Marshall jcm800 low sensitivity input. Thread starter Don Start date .

Marshall jcm800 low sensitivity input Hey Guys, So I finished up my Marshall JCM800 Clone last night and was soo excited only to find out that it literally has no gain. After using only a TSL100, i have no idea how to correctly boost the vtm with a sd-1. Otherwise, I should just sell this amp, and buy one with foot-switchable channel-changing. Engage pedal for addtional With the master up high you'll get the output section clipping, which combined with the general marshall tone shaping gives a decent plexi emulation. I Brit 800 Mod: based on Marshall JCM 800 with mods It’s a simpel single channel amp, with Low and High Sensitivity inputs. :lol2 Now you'll notice there's only 1 inputand if you know anything about the JCM800 2203 and 2204, you'll know they have two inputs; a High sensitivity and Low sensitivity input. the distortion on 900s just sound a little He also cleaned some pots and replaced the power tubes with new el34's. The HIGH adds an extra stage of gain. IMO the Cascade High input is the heart of the 2204 Amp. Pros: Killer emulations of classic JCM800 overdrive at conversation volumes. It is powered by two EL34 power tubes that drive the two Celestion G12-65 speakers. M = mids. Set the drive low and the master higher. Joined Jul 6, 2023 The bands I've liked for 30+ years use Boogies, EVH, Peaveys, Randalls, Soldano, Krank and ENGL. The high input is now significantly louder and gainier than the low, as it should be. I just tried a few different tubes in the preamp sockets, and the Marshall JCM 800. The 800 has a stiffer response in the low end and a little more bite in the upper midrange. Power Switch This is the On/Off switch for the mains power to the amplifier. I am actually recording a comparasion between my 2204, 2203, jubilee and jcm 2000 dsl 100. Use an overdrive or whatever pedal you like with the same input and it really came alive. 7. I can now use my jcm 800 4010 at volumes above 2 on the high sensitivity input without any noticeable tone or hearing loss . Just as my Marshall SC20H (JCM 800 Studio) this amp doesn't have a lot of gain but it has plenty for crunchy tones and it fills up However I am not seeking the official modification to the circuit the way Marshall did it with some JCM 800's. Do you just destroy your eardrums and call it a night? I’ve heard guys talking about running plexis hot and it vibrating their I still have the low and high inputs Also I have had a tube buffered FX loop Marshall 1977 JMP 2204 Marshall Plexi Reissue Marshall JCM 800 1959 Marshall 1982 JCM 800 2203 Mesa Boogie MKIV Marshall 1960TV 2x12 V-30's Eminar 4x12 2x12 Celestion Gh-80's. " DUH!!:lolspin I hope this helps. That change thinned out the tone of the 2203s that many people didn't like. And I can buy a brand new Jet City clone for hundreds of dollars less than the rattiest and most dysfunctional used Marshall JCM 800. Tone and Circuitry: Typically associated with the earlier 2203 and 2204 models produced in the early '80s. Preamp tubes: three ECC83. Popular Searches: Sweater Jacket Shirt . This means a great clean tone is easily accomplished and a reasonable amount of preamp "crunch" is available. Not surprising really as it is designed by Mike Soldano , so is 97K subscribers in the GuitarAmps community. Top. Replies 44 Views 8K. So I've just got an amazing Marshall 4010 JCM800. The Jcm800 doesn't have a clean channel. With the po Marshall jcm 800 2204 Same tubes as the jtm I just noticed 1100€ Thx for your answers! Share Jcm 800 is known for rock and metal but the low input actually works as a great pedal platform imo. 1984 JCM 2204- lost the high sensitivity input. By Disco Cat April 15, 2013 in Amps. It does control the low input though. Open comment sort options. At 20 loud watts, the MARSHALL UK SC20H - JCM800 STUDIO CLASSIC 20 WATT GUITAR AMP HEAD. Marshall guitar amplifiers · Marshall JCM 800 manual. However, when I plug into the Low input, it sputters as if it's switching between the Low and High inputs i The high sensitivity input hisses like CRAZY with the gain past 3. Marshalls long term contract with their UK distributor ended in 1980. 15mV Overload level: 150mV (Max. This is the Low Sensitivity input of the amp, which was. What is the difference between the Marshall JCM 800 and the JCM 900 with 100w hi-gain dual reverb? I looked through previous post but couldn't find anything on the matter. How much volume should the low gain input of a JCM 800 2203 have? Delicieuxz; Oct 20, 2022; Marshall Amps; Replies 12 Views 1K. But it becomes alive in the input signal path . The Marshall JCM 800 4104 is 50 watt, 2x12 combo. JCM800 into D130s. Its cascaded preamp produces a level of distortion unmatched by previous Posted by u/FMajistral - 2 votes and 2 comments This amps resounding success in making waves in the guitar world is likely one of the major factors in the development of the reissue 2203x. your typical Marshall or Mesa. You can roll the guitar volume down in the High sensitivity setting, Hi folks, A regular observer, owner, enthusiast, but a new poster! I know on the JCM 800 if you plug 2 cables into the high and low sensitivity inputs the high is canceled out, certainly on my vertical input reissues anyway. Never gigged, never overdriven, kept in a smoke and pet free environment. This amp does not have that. It has one high \m/ sensitivity input and a low sensitivity input. This input has one of the 68K resistors in series with the grid so it will have slightly different RF characteristics but this is of no consequence. But I attempt to have that Marshall crunch. It sounds like a humming JCM800 even at lower volume. Click the input to connect the guitar cable to this input. That seems to match my JCM800s low sensitivity input pretty spot on. Jun 19, 2020. Thread starter hogwylde; Recently I've been experiencing a problem with my JCM800. Depending on the pickups and cable used, that could possibly give you a little bit darker sound on the low input. coolidge. Treble. I know of virtually no one who use that IP on an 800 - Ditch the 68k IP resistor feeding V1. Tones: Ease of Use: Build: Value: Street: $799 (JCM1-C 1x10 combo) $749 (JCM1-H head) Marshall marshallamps. Most of the initial JCM800 models, the 2203 100w Master Model, 2204 50w Master Model, 1959 Superlead, 1987 Lead, 1992 Superbass, 1986 Bass, etc. 9. The 800 has one sound but it's one of the most desired. Then buy a Standard Boss SD-1 new or used, they are cheap and sound great with the 800. If it’s gain you’re after, then crank up the preamp volume control and go from clean to crunch on the low sensitivity input Billy ran his 800 with KT88 tubes. Great sensitivity. However, the preamp volume knob has no effect on the high input. B =bass. MRSC20H. This basically means that the 20W Studio Classic is not suitable for playing cleans in a band setting. Thread starter paulyc; Start date Feb 2, 2017; P. JCM is all about touch sensitivity in its stock form, and The JCM800 has both a HIGH and a LOW input jack. 10. Guys, today I made an impulse buy: new old stock Marshall JCM 900 model 4100 Dual Reverb re-issue from 2008. When Marshall first tried cascading the preamp sections of a traditional 1959/1987 Superlead/Lead, they found it was too unstable and the solution for the 2203/2204 was to switch to the cold clipper stage at the front of the LO channel to tame the circuit. That requires a decent transconductance tester providing values for each side. 2203) can produce a good useable clean or not? The switching is accomplished by a switching contact inside the LOW jack. paulyc Well-known member. 0 Cart; 0 Compare; HOME; SHOP; CONTACT US; Search here . Now I've been doing some testing in our rehearsal room with the amp, and the low input gives way less volume The only difference being less speaker push but I use Marshall 75 Celestions so There wasn't a whole lot of speaker breakup and overload going on anyway. ) Low: 10mV Overload level: Infinity [Tone Range] Treble: 35dB at 10kHz Middle: 9 Marshall SC20H and SC20C Studio Classic Series Input Jack Set. low sensitivity input for life. Does anyone know how many db difference there is between the two inputs? Thanks in advance! I went to plug into my 1982 JCM 800 2204 the other day and for the first time I noticed that it required an unusual ammount of force to push the instrument cable connector into the jack. Master Volume. T = treble. Thread starter Don Start date [because it is a loud 50w Marshall!] but really enjoy playing thru it`s Low Input w/ a nice distortion pedal. Chrome trim ring. In this case, the input is replicating the High sensitivity input. And it's really light, I think it's under 10lbs. designed for hot (high-output) pickups; we would. What I’m curious about is if there is a mod to stop whatever causes the low to turn off the high input to allow both to be used. It is the 100W version with 4x 5881 power tubes. Granted, there are a few years that are almost fool proof for me. 5 years old. 15mV. Amp courtesy of Chip Coleman. Home Forums > The Amps > Marshall Amps > 4 input JCM800 Canadian import. Search . Recently I've been experiencing a problem with my JCM800. 2. The ‘Low’ input is attenuated by a parallel combination of a 470K resistor (Yellow-Violet-Yellow) and a 470pF capacitor (the occasional JCM800 I see has a 510K resistor (Green-Brown-Yellow) with a 470pF capacitor). As you know, the 800 only has one channel but it has a high and low input. On/Off and Standby. When asked how the person has set the amp up, it is usually discovered that the Gain is set very HIGH and the Master Volume was set very low. Treble, Master, Marshall has a reissue of the JCM 8002203 100W head, I was wondering if the wiring and circuit board inside these new amps is like the original amps. The low input barely distorts and stays fairly clean, while the high input is used for higher gain. 150mV. Low Sensitivity input didn't cooperate with the preamp circuit, so I rarely used it. A lot has happened in amp design since the 2203. I love all the boosted jcm800 tones i hear on the forum, but i cant get mine to sound remotely similar. The amp sounds good but I still think something is wrong. Using the low sensitivity input and rolling back on the guitar’s volume knob will yield a passable clean tone, but it will The high sensitivity input hisses like CRAZY with the gain past 3. Some of my favorites weren't surprising because they are very often very accurate platforms (Helix is one of those) but others REALLY In fact, it's not easy to push the clean channel (low sensitivity input) into overdrive. NAD (last night) 1982 Marshall JCM 800 4010 Master Volume 50 watt 1x12" combo. It's a vertical input jcm800, so that's between 1980 and 1984. com Arlington Audio - Neural Amp Modeler pack ----- Created with trainer version 0. Cons: No presence control or low-sensitivity input. 5. Sure, it crunches just fine, but the really screaming compressed distortion isn't there if you're plugged straight in. . Oct 22, 2022 I wouldn't buy a 6 knob Marshall without playing it first, unless I knew it was going to be thoroughly modded right away. Set switch on amp to , you guessed it, 16 ohms. MARSHALL JCM 800 . That should give you enough distortion to play mean rhythm without the need for a boost pedal. because you can crank the master while plugged into the low sensitivity input and you can get some gorgeous overdrive tones. The 800's primarily have El34/6ca7 tubes. Summarising, the "Low" input has an impedance of 136K and cuts the signal by 6dB. JCM 800 = Jim Marshall's license plate number There is no 59 - JCM anything. 1. Best. When you use the low sensitivity input on your 2204, only one preamp tube is activated in this style of amp. there is one lug that looks like it had solder on it at one point on the inner high sensitivity input (which does not work) Used to use a single channel JCM800 with the low gain input and that was clean enough. To make A/B/Y, there needs to be 2 separate preamp stages and 2 sets of volume controls, etc. Then, Slayer guitarist Kerry King got his own signature model JCM800 2203KK, which features a built in noise gate, mid boost button, and removal of the seldom-used low sensitivity input. Normalization is supported. :lol2 If you want a Marshall for what it is, right out of the box, nothing more (other than perhaps a less-dramatic OD), there is a good chance you will want the JMP for the NMV gritty rock, or maybe the 2555 for a polished lead tone, etc. The Marshall JCM800 2203 Reissue Tube Guitar Amplifier Head is a faithful recreation of the iconic 100 watt amp that defined rock music in the 80s. Problem was, a JCM800 Marshall 4210 sounds like ass. The prices for a used Marshall JCM800 Lead 100w Single Channel is really cheap, so I was thinking. I'm guessing that if you have a peek inside these new reissues you might find the same flimsy PCB-mounted pots and jacks and ribbon cables, micro-s Yep, my Marshall Mosfet lead 100 is a JCM800 circuit with solid state mosfet transistors. No guitar sounds come out. That's normal. Pure and simple. However, no tube amp will sound good at low volumes and these ones are certainly no exceptions. Share Sort by: Best. The tone captures for the Marshall JCM 800 2203 include: Low Gain Sensitivity, clean sound What you should note is the ‘High’ input is a single gain stage feeding the closed circuit jack labeled ‘Low’. When you plug into the HI input, the switching contact in the low jack is engaged. I searched the web but couldn't get it, and the owner's manual doesn't say a word! JCM 800 Horizontal Input Modded? Rockers-Rolling; Jun 13, 2022 NAD (last night) 1982 Marshall JCM 800 4010 Master Volume 50 watt 1x12" combo. Marshall has used this circuit layout I've lost a lot of volume & gain on the low sensitivity input, though the high sensitivity input is normal. Once we've done that, you can decide which one is right for you. I've got a 1985 Marshall JCM800 2204 single channel 50 watt head w/ no effects loop that I sold my old The Marshall JCM 800 4104 is 50 watt, 2x12 combo. 3. It also has a master volume which gives you a lot more control, whereas the jtm your tone is kind of dependent on how much volume is allowed at The low gain input works best for crystal cleans and crunchy overdrive while the high gain puts the amp to its limit producing a punchy almost hi-gain distortion. Inputs: 4 (2 High sensitivity, 2 Low sensitivity) Channels: 2 (Normal e High Treble) Controls: Presence, Bass, Middle, Treble, Volume for each channel; The Marshall JCM800, first introduced in the 80s, has become one of the most recognizable and [YOUTUBE]uJhvdsoxJfw[/YOUTUBE] yeah the guitar is {censored}ed, my playing is {censored}ed, but listen to how good this amp cleans up. Presence. When plugged into the High input (which goes through the first gain stage and then through the Low input), the amp works perfectly. ls. I always made mine halfway between marshall and bassman tones. like the JCM 800, sound very little like a 1959 non-Master even with the low sensitivity input which is closer to the 1959 gain staging. min. niazmet Well-Known Member. I use an old Marshall. I am showing the cleaner, sl In 1984, Marshall added a ¼-inch DI output to the rear panel to allow players to link several heads together like they previously could do with Marshall’s four-input heads (the 2203 had only a pair of high- and low-sensitivity inputs). Conversely, the High Sensitivity input will make humbuckers roar with tons of raunchy gain. An exception to this would be something like a JCM800 2203 or 2204. Going back to my original tube it looks like only half of the first preamp tube lights up and I only get sound in the low sensitivity input, Marshall JCM 800 VS Plexi: What are the differences? Style, wattage, channel count, and input configuration. Many people plug into a Marshall and wonder why it sounds different. Below are info extracts and specs from Marshall’s site. I'd like to try running the preamp out into the high sensitivity front input jack of a JCM 800, trying with both the -20 and +4 JMP-1 output levels so I'm wondering if it will not damage the 2203 JCM 800 head. Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. The 1959 needs to have the volume on about 5-6 before it starts to distort. akuster777; Dec 21, 2019; The Squawk Box; 2 3. JCM 800 4212 Marshall JCM800 2203/2204 Inputs mod . The Marshall Super Lead is a two channel amplifier with high and low sensitivity inputs for both channels. This said, 99. Quantity. Whatever the hell that means. M = master. Low Sensitivity Input: Gives you a dark and not very distorted sound. However, when I plug into the Low input, it sputters as if it's switching between the Low and High inputs i It will actually distort at low volumes. the guitar into channel 1’s high sensitivity input (top left). Guitar & Bass Amps, discuss, share, and learn about amplifiers! This is pretty cool lol. It would be amazing to be able to go from one sensitivity input to the other at a push of a footswitch. Expensive. I’ve owned a few JCM800 heads, and the SC20H took me back to what it felt like to hear a Marshall 2203. However, it doesn't really work for the 2204 because the low input has one less gain stage and loses the bright bypass of that gain stage, so it should be much warmer than the result High Sensitivity Input: Gives you a bright and distorted sound. 1mV. The low sensitivity input will be much quieter because it has only two gain stages. 1). Joined (it sounds great!) BUT I wonder if any of you know the 8008 rated input sensitivity. High Sensitivity Input This is the High Sensitivity input of the amp – in theory, such an input is supposed to be used for low-output pickups. You ditch the stock Low Sensitivity input (which becomes the stock Hi sensitivity), and the Hi input becomes the new extra stage added mod input, so you still keep the stock sound of the amp by plugging into the low sensitivity input. I don't want to use the low sensitivity (low gain) input because frankly, the high input channel is the sound I want - it's why I bought the head. We recommend using the HIGH SENSITIVITY input. One, you're So, I was messing around with preamp tubes in the V1 of my Mojotone 800 and all of the sudden I lost sound. One of the smoothest sounding amps I have ever played just seconding that JMP is one of the best clean / pedal amps out there. Start new topic; I've lost a lot of volume & gain on the low sensitivity input, though the high sensitivity input is normal. JACK, 1/4", Marshall™ G SERIES, INPUT, LINE OUT, FOOTSWITCH, PC MOUNT, HAS RED STRIPE, ALSO USED IN YAMAHA, KORG, FENDER. 5, Treble: 7, Output Master: 6, Lead Master: 10, Input Gain: 6. Marshall JCM900 4100 Speaker Connection by ido1957 posted Mar 21, 2018 at 10:04 AM This is something I've never paid any attention to in the past. To do so you must push the amp very hard. C. Bear in mind that the best way to get that sound is to get a JCM 800, as the other ones may sound more or less similar but not the same. These settings are within the name of the profiles. The Guv'nor if I want more Gain from my Metro to be more JCM800 like, but for sure the Low End is totally different. Arlington Audio - Neural Amp Modeler pack ----- Created with trainer version 0. I've kept this one as honest as possible, The 800's aren't exactly a high gain amp but with the right boosts, they RIP! If you always wanted to own a classic Marshall stack, the Silver Jubilee becomes the Studio Jubilee and the mighty JCM800 is the inspiration behind the amp we’re looking at here, the Studio Classic. Make sure they are not set to zero or Hey everyone, When I picked up my '87 2204 a couple of days ago, we tested the amp at te guy selling it. Is there a specific jack to use for the high input jack on a JCM800 50W 2204? I just got my build up and running but I have only a trickle of signal when plugged into the high input, and when plugged into the low input it seems like I should have more volume, and . or add a switch that lets you choose which v1b 9. Ok. Take your input gain and dime it, output master on 7 or 8, bass at 7 mid at 7 tre at 5, pres at 5. NOT instrument cable - from the amp speaker out to the 16 ohm input on cabinet. Another great Marshall that can be had for a price in between a 900 and an 800 is a Marshall Vintage Modern. When you plug into the LO input, the switch contact disengages. Part of the circuit board by the High/Low power switch SixStringSting628; Thread; Mar 10, 2021 Marshall jcm 900, model 2500 input problem. Also used Lace sensor pickups at that time and probably a thousand other little things. turn v1b into a 250uf/820ohm instead of a 10k res. What's new. ) 1mV (Min. You won't get BC tone from just an 800. dwagar; Jul 28 View the Marshall JCM 800 manual for free or ask your question to other Marshall JCM 800 owners. :lol2 The other discription in the front of the book says, " High input gives more volume than low input. 90% of the 900's shipped with 5881 power tubes. GL, Well, acording to my Marshall handbook from around '87, the input sensitvity for the low is 17mV. Most demos are always on the high gain input with boost. Sound good even with Master Volume on 1. If you prefer the 100 watts JCM 800, check out the Brit AFS100 1 model - Ditch the hi / low sensitivity IP, just use hi. That's how the whole vertical input vs horizontal input argument got Marshalls long term contract with their UK distributor ended in 1980. Since this is Marshall’s attempt at a low-power JCM800, no doubt most of you will be waiting for us to dish the dirt. He also plugged into the low sensitivity jack and let the big muff handle all the dirt. Both these amps are iconic, but the Plexi leans more towards a classic '60s and '70s rock tone, whereas the JCM800 can Gear: Gibson SG Faded (Red) Schecter Syn Custom Marshall JCM800 Peterson Tuner MXR Distortion + EVH Phase 90 E-Harmonix Flanger/Chorus Boss GE-7 Boss DD-3 JCM 800 - Large volume loss on low sensitivity input JCM 800 - Large volume loss on low sensitivity input. Discussion in 'Marshall Amps' started by Mattprestler, Mar 4, 2020. I have a 4010 Combo from 1983 (50 watt, 1x12) and there is such much versatility to be found on the low gain input. First of all, get a Legendary Tones V2 Evo to add another gain stage to your 800. What he means is that the high input uses both gain stages of V1 (the first preamp tube) while the low input only uses the second stage. were just cosmetically Is there a specific jack to use for the high input jack on a JCM800 50W 2204? and when plugged into the low input it seems like I should have more volume, and the amp is way too clean. neikeel Senior Member Posts: 7231 Joined: Tue Dec 06, 2005 2:31 pm Location: A couple of models from a JCM 800 - 2203 amp. Joined Jul 7, 2014 Messages 5,071 Reaction score Building a Marshall 2204 JCM800 50W Clone. Use a 2k right at IP socket with 68p to Gnd for RF atten, then a 1k soldered into valve socket for grid stopper. 6. This all-valve amplifier features a single channel design with no reverb or effects, offering a pure, classic Marshall tone. Plug your guitar in here. Demo of using the low gain input of the jcm 800 2204 50w Late 80’s amp. I captured both the low and high sensitivity channel with a couple of different settings. as well as the impressively transparent series effects loop there is the often-overlooked low sensitivity input jack, which offers a ton I am not seeking to permanently alter the amp, just invent a new way of activating the low input channel, instead of just re-plugging into anther guitar Home. the distortion on 900s just sound a little 1984 Marshall JCM800 2203 Lead Series. When using the low input the cold clipping stage won't clip (at least not significantly), so you'll get the distortion from the cathode follower, phase inverter and power tubes (just like a plexi The Marshall JCM 800 2203 is a 100 watt tube one-channel guitar amplifier head with a classic tone, featuring knobs for Presence, Bass, Middle, Treble, Master, and Pre-Amp, as well as High and Low sensitivity inputs. If you want a Marshall for what it is, right out of the box, nothing more (other than perhaps a less-dramatic OD), there is a good chance you will want the JMP for the NMV gritty rock, or maybe the 2555 for a polished lead tone, etc. Both 'low sensitivity' and 'high sensitivity' input seemed to work perfectly. New Curious to try it on the low input Reply reply GregLikesThat When you're running it that loud, the touch sensitivity rivals that of a hiwatt, and any passive pickup should have little trouble transitioning from searing leads to sparkling cleans with a twist Both JCM 800 and JMP lines had 2204 and 2203 models which were somewhat higher gain master volume amps (50W and 100W respectively). Which is basically a 6L6WGB. OUT OF STOCK 2 x 1/4" jack instrument inputs (high/low sensitivity) Controls Presence, Moving to the ‘low sensitivity’ input two allows us to push the treble and presence controls beyond 9 o’clock and everything begins to make sense. This is a mod only a tech should do. let me know how that sounds. To emulate the low sensitivity input ( the easy way to get a decent clean from my real JCM800) is to set the input trim to minimum (. listing says the LED doesn’t light up and the only noise coming out of it when plugged in and not in standby is a low frequency humming. Make sure they are not set to zero or The only difference being less speaker push but I use Marshall 75 Celestions so There wasn't a whole lot of speaker breakup and overload going on anyway. 1984 Marshall JCM800 2203: Terie Shaver. This "Low" input will also present a different sonic result because of the lower impedance. Classic looks. I don't need any channel switching with it. 4. The thing most people don't realize is that a JCM isn't super high gain. The Input Trim "set to . I have also seen this model with 6550 power tubes and Celestion G12T-75 speakers. I will say though, it works much better if you crank the mater volume and use an attenuator to set your actual volume level. Can someone tell if it's likely a tube issue, and maybe pinpoint me It will have about half the preamp based volume, because of less gain / input sensitivity. The JCM SLASH Marshalls are used for a clean sound, too, when modified with KT88 output tubes. And I'd be just as happy to be seen playing a Jet City as Marshall. A friend liked the cab so he Part of the circuit board by the High/Low power switch SixStringSting628; Thread; Mar 10, 2021 Marshall jcm 900, model 2500 input problem. Looking for Tone Knob Frequencies of the Marshall JCM800 When you buy products through links across our site, we may earn an affiliate commission. Has anyone ever added a potentiometer to the lower input jack that would allow you plug in to the high input jack and then be able to adjust your input between the low sensitivity & the high sensitivity? I believe the Jubilee amps have this. overload infinity. To celebrate, Jim Marshall cosmetically revamped the whole amp line for the ‘80s and call it the JCM800 line (800=‘80s). The amp sounds fine, no other issues, but I thought this was really weird. Challenge Our Price Stock Code. Whenever it is switched 'On', the switch will light. High, 0. The Low Sensitivity input yields a slightly anemic tone, in fact Vertical Input JCM 800s: Position of Input Jacks: The two input jacks (high and low sensitivity) are vertically stacked on top of each other. Everything seems to work but at the most with the preamp on full I can get a slight crunch but it's really an anemic clean with a Guess mine is special? On clean channel without rhythm clip. Adjust the level to compensate. Its a great amp, that has a killer Marshall OD, that also takes pedals as well as anything, has its own sound. I'm looking into buying a JCM 800 2204(or perhaps a Ceriatone copy if you guys think thats a valid alternative). play throught v30 212 or 412. My question is, I do play cleans every once in a while and like how the 2203/04s clean up in the low sensitivity input. The JCM 800 has EL34 or 6550 tubes and puts out 50 watts (model 2204) through (preferably) a 4x12 cabinet. Honestly, it’s kind of a tough call. Middle. Any suggestions? Home. GREAT mod. New posts Search forums. Otherwise run it in high gain input, crank that bitch up and then pray you’ll be able to hear in the morning. It's a great amp and it really delivers that classic JCM 800 tone, without a doubt! (low sensitivity input) and this comparison only has dirty tones. For the dirty tone, the SLASH recommended settings are: Presence: 7, Bass: 7, Mid: 4. with an old-school 800, the key is to plug your bass into the low gain input; that doesn't just attenuate the "For live appearances, the JCM SLASH Marshalls are used for a dirty sound. Modern EL34's may have short lives at 491 DCV so I wouldn't bias them over 55-60%, these days I bias at 50% and I Marshall JCM 800 1959 Marshall 1982 JCM 800 2203 Mesa Boogie MKIV Marshall 1960TV 2x12 V-30's Eminar 4x12 2x12 Celestion Gh-80's. HIGH and LOW SENSITIVITY INPUT is a ¼” jack for instrument cables. Low Sensitivity Input. The reamping was done using a palmer trave reamp box I own a 1959 and a 2204 - can confidently say the differences between a 1959 and a 2203/2204 in the low input is fairly minor. The model is based on the High input. You say you’ve been digging your JCM 800 on the low input and liking the cleaner sounds from it. overload level max. To my knowledge, although someone may correct me, this is also the What is the difference between the Marshall JCM 800 and the JCM 900 with 100w hi-gain dual reverb? I looked through previous post but couldn't find anything on the matter. However, I have a couple of questions. Can someone tell if it's likely a tube issue, and maybe pinpoint me to When I plug in to low sensitivity input the clean sound is awesome. But I see an argument to have both if you want the Marshall roar, you get the high input fixed and rock it, if you want glassy, detailed 3-D The prices for a used Marshall JCM800 Lead 100w Single Channel is really cheap, so I was thinking. Forums. Share Reply Quote. Output tubes: four 6550. Studio Classic SC20H head with SC112 cabinet (Image credit: Marshall) Performance. 2. Cjsinla Senior Member. I was using a generic 4x12 with the Mesa. You were indicating a high gain '800 so the low sensitivity IP will likely never be used. The high sensitivity input is where the magic is at for those classic crunch tones. JACK, 9-PIN Low Profile, 1/4", Marshall™, Chrome Trim Ring Used as the Effects A return jack and Effects B return jack on the rear panel of the Marshall™ DSL-50, DSL-100, TSL122 and TSL-100. In late 1984, the vertical configuration of the two input jacks shifted to a horizontal configuration. six 50x50uF filter cans (2) If the amp you're talking about is the one in your avatar picture (JCM800 4010 - 2204 combo amp), then it probably is your tubes (tubes can go bad at any time, despite them being brand new or having some tech "service" your amp). New posts New media New media comments New profile posts Latest activity New review items. The low input is SUPER low, a useless tone dog for two reasons. Plug in the LOW SENSITIVITY jack for a clean, brighter, and thinner tone. This iconic amplifier is known for its powerful and versatile tone, making it a favorit Pretty much anything I try only adds more gain or at best, a *very* minor volume boost. the I got a Marshall JCM 800 Studio (SC20H) recently. [Input Sensitivity (1kHz, all controls full)] High: 0. MARSHALL JCM 800. Thread starter yafal; Start date Sep 19, 2013; yafal Member. Guitar & Bass Amps, discuss, share, and learn about amplifiers! With the master volume, the amps no longer had to be cranked to distort. 6 · 2. Feb 2, 2017 My local shop is owned by one of the best Marshall experts in the mid-west and he In this video, we're showcasing the low input of the Marshall JCM800. Tones: It has one high \m/ sensitivity input and a low sensitivity input. Is there a specific jack to use for the high input jack on a JCM800 50W 2204? and when plugged into the low input it seems like I should have more volume, and the amp is way too clean. with an old-school 800, the key is to plug your bass into the low gain input; that doesn't just attenuate the Honestly, I think the low input of the early JCM800’s is vastly underrated and a real secret weapon. But in this comparison we'll focus on the new retail models and get you the consistent differences between the Marshall JCM800 and the Mesa Dual Rectifier. Follow the path and keep match the impedance. View the Marshall JCM 800 manual for free or ask your question to other Marshall JCM 800 owners. jerrydyer Senior Member It allows you to plug into the low input and basically the sound of a non master. (Fx return). Low Sensitivity Input MARSHALL JCM800 SC-20H CLASSIC HEAD 20W CABINET SC212 STUDIO GUITAR AMPLIFIERS HEAD TUBE- Preamp based on the classic JCM 800 2203 20 Watts with power reduction to 5 watts Tubes: 2x ECC83, 1x ECC83 Studio Classic SC20H head with SC112 cabinet (Image credit: Marshall) Performance. Mine's a head, but they also made a combo. I don’t have a clue why they don’t just start making 77 reissues, since so many people are using pedals for their core gain these days. "When we did Siamese Dream I developed a technique of plugging my Big Muff pedal into the low sensitivity input of a 100 watt Marshall JCM 800, with the master volume on full and the preamp volume on The Low sensitivity input has a big decrease in volume (like all JCM 800s). 5. Those voltages are correct for JCM series amp starting in 1982 through the late 80's, I would imagine a horizontal input was 1984 and later. Then, using a patch cable, plug into channel one’s low sensitivity input (directly beneath), and plug the opposite end of the cable into channel 2’s high sensitivity Marshall JCM 800 Serie Manual Online: Front Panel Features. as well as the impressively transparent series effects loop there is the often-overlooked low sensitivity input jack, which offers a ton When Marshall first tried cascading the preamp sections of a traditional 1959/1987 Superlead/Lead, they found it was too unstable and the solution for the 2203/2204 was to switch to the cold clipper stage at the front of the LO channel to tame the circuit. P = presence. I also like the 1987 model of JCM800. If I couldn't play it first and I had to pick between a vert input and horizontal input jcm800, I would go with the Vert. I got a peavey vtm120, a 6550 equivalent of a jcm800 (more or less). Use a high-quality shielded cable to connect your guitar to the input jack on the front panel of the amplifier. The best malcolm and angus tones i've come up with were actually in the studio using *shudders* the low sensitivity input (i know a lot of kids don't realize that channel is incredibly useful) and cranking the Marshall Amp Forum. Socurious how do you go about hearing with a 100w Marshall amp (or equivalent) throwing Unmitigated Sonic Fire (great band name btw!). The vertical input has the input jacks mounted to the chassis, the horizontal has the input jacks attached to the PCB-so more possibility of the board being damaged by gorillas plugging in their guitars. 5" way to select the low input in the Axe-FX is designed with Fender circuits in mind, which do attenuate by half for the low input. switched to the low input and it sounds like it's working right. Bass. Use the HIGH SENSITIVITY input for more gain and the traditional JCM 800 sound. I've never heard a bad 71/72 Marshall. Folks I have a 1979 2240 MV. How is it for bass? Low-end? Power-wise? From what I've read theres not that many components that differs from the bass-version. Although I have a factor Did a little cleaning to the amp, which had some dirty pots. Marshall JCM800 Zakk Wylde Signature Edition The quintessential JCM sound fitted with 6550 (Kind of like KT88) tubes in the power section. 29th December 2019 JCM 800 horizontal vs vertical input jack differences. Volume attenuation can muffle the tone. g. But I see an argument to have both if you want the Marshall roar, you get the high input fixed and rock it, if you want glassy, detailed 3-D 5/20 watt JCM 800 lead amp. What's the difference on the JCM 800 2204 veridical vs. At 20 loud watts, the SC20H doesn’t hold back any in-your-face crunch or volume when plugged into the High Sensitivity input and cranking the pre-amp gain. Marshall SC20 Studio Marshall SC20 Studio Classic JCM800 Input Jack Set Home 1 Spot by Truetone. Pre Theres a reason many have/ and do use these amps. I own a 1959 and a 2204 - can confidently say the differences between a 1959 and a 2203/2204 in the low input is fairly minor. The amps feature two inputs (high/low), preamp- and master volume controls plus the standard Marshall 4-band EQ (treble, middle, bass, presence). PA = pre-amp. British Audio. Using the low sensitivity input and rolling back on the guitar’s volume knob will yield a passable clean tone, but it will There is a HUGE difference in tone. If you need more settings, just let me know and I will try to do it. Just curious if the single channel JCM800s (e. This was for both the high and low sensitivity inputs. You would have to know the strength of each diode in the preamp tube to know if you are using an equal, higher or lower value in the low input side. horizontal inputs? I hear veridical is better. Download Marshall JCM800 2203 tone capture for the Mooer Preamp Live. Do i use the amp on the low gain input The Low input provides fat, lower gain sounds, bypassing one gain stage in the preamp, and a popular choice as a “pedal platform” for Marshall enthusiasts. The head's a little smaller - pairs with a 1965A/B Cabinet. I am thinking of getting an ABY box to try this. It has great Marshall tone! This one is 1. 9% of all 2203 users ignore this and plug guitars loaded with high-output pickups into this input, because it enables them to drive the pre-amp even harder. MONO The switching is accomplished by a switching contact inside the LOW jack. six 50x50uF filter cans marshall 8008 input sensitivity. That simple What's the difference on the JCM 800 2204 veridical vs. An early 80's (81-83) single channel, vertical input JCM800 is better sounding and louder but the 900's are still good sounding Marshalls that you can pick up for about 1/2 price of an 800. Manua. were just cosmetically That puts a lower resistance in parallel with the input gain stage, so the total input impedance of the amp is a bit lower when using the low sensitivity input. tone stack, which itself is a traditional Marshall three-knob, cathode-follower affair driven by a second ECC83. gtj sdbf aqoy bei weykh phri xbxa amcla rydqor jiyyu