Marshall amplification is a british company that designs and manufactures music amplifiers, speaker cabinets, brands personal headphones and earphones, and, having acquired natal drums, drums and bongos. If theres a different problem, the amp could conceivably eat the new tubes, so its a bit of a crapshoot. For ov er three decades my company has been dedicated to the design and manufacture of the finest amplification systems in the world. You can also combine the raw switch with the raw control pot next mod below so you can fine tune the. Scott todd demoing the marshall jcm900 12 stack with a string of classic rock riffs. Marshall has now become a household name throughout the world as a symbol of precision acoustic engineering, to be relied on, not only for superlative sound quality, but for high performance night after night. Incidentally, this amp was built with el34as the wiring looks as straight from factory, pin 18 are joined on the tube the serial number also starts with z which i am led to believe is when marshall jcm900 4100 used the el34a. Marshall jcm 900 2501 50w hi gain master volume mkiii. Set of 4 screws, stainless steel, 1 12 long, phillips, oval head, with matching cup washers. Jcm 900 valve 4100 dual reverb, jcm 900, 4100 dual reverb. For the past two decades, one name has been synonymous with the best in rock amplification. The nineties 1990 1999 was the era of the jcm900s and the reissues.
I believe its a 1992 era i bought it about 78 years ago just had the pots cleaned and tubes checked by local amp tech ec83s and el34ssolid amp great marshall tone comes with footswitch very good condition almost no were on tolex small separation underneath but still glued in place if you were looking at this amp please do your research before buying on what it sounds like before you. This two channel dual reverb 100w powerhouse will make you stand out on stage. Unfollow marshall jcm 900 to stop getting updates on your ebay feed. Marshall diagrams, schematics and service manuals download for free. Code 25 owners manual contains full information on using your code 25 amplifier, as well as details of the specifications. Statistically the newer jcm900 version, the less liked it is as it started to deviate from the jcm 800 models more and more along the timeline. Because for me, theres no real marshall, or a marshall with a better sound than another marshall. Download handbooks and quickstart guides in pdf format below. Manuel utilisateur en avis dutilisateurs donner mon avis 21 02 2019 wood38 sur marshall jcm900 4100. Ive got a jcm 900 and have also used a jcm 2000 extensively tsl model. I was trying to look into more information on this online but could not find any so here i am, the marshall jcm 900 mkiii higain 2500 has a footswitc.
I looked through previous post but couldnt find anything on the matter. After some enquiries from retailers i found a seller that i think gave me some good advice but just wanted to get a few more opinions before i fork out the cash on new valves. Does marshall even makes a 1x12 combo, of any kind, anymore. Marshall jcm900 21xx 25xx 100w schematic marshall jcm900 25xx 45xx 50w schematic.
I have an electronic background so i know just enough to be dangerous. A stylish reissue, the jcm900 4100 tm is the evolution of the jcm800 adding another channel, two reverb options and two gain features. Marshall jcm900 4100 hi gain dual reverb september, 2012 november 30, 2017 steve 2 comments. Marshall jcm 900 mkiii 2500 tube guitar amp head amazing sounding amp with high gain. Jcm 900s, while more versatile in features then ever before, have been stigmatized by being the dogs of the marshall lot and are typically held in low esteem. The jcm 900 models split into two distinct product ranges, the master volume slx and the dual reverb. Shame on me, but have been taking my amp to technicians to replace the tubes and bias it all these years but have never found one that i could trust knew what he was doing. Marshall jcm900 slx 100w 2100 schematic the tube store. Modern vintage 1994 marshall jcm 900 model 4500 50 watt amplifier head.
We have a huge schematics inventory, projects section and forum. View and download marshall amplification jcm 900 valve series handbook online. This was the combo version of the 2098 master lead head. Marshall amp schematics to assist you with your amplifier repairs and modifications. They nail the acdc tone easily, but for heavier stuff, they need a little bit of help. To open downloaded files you need acrobat reader or similar pdf reader program. Hey guys my friend is letting me borrow is jcm 900. There are dozens of models and each has its own sound.
The jcm 900 is, at its core, a typical marshall, i can assert that without hesitation. Jcm 900 valve 2100, jcm 900 valve 2500, jcm 900 valve 4100, jcm 900 valve 4101, jcm 900. I was expecting it to be fun, and i hoped it would be better than the ordinary jcm900 which i think is the worst amp marshall. Special selection set, selected for best crunchy clean channel and hand selected punchy high gain power tubes set. Its the rarer el34 version of the already hard to find slx model so i couldnt resist it. Posted on april 29, 2015 june 2, 2015 by don stick guitar. After a few minutes of playing, it fades out then fades back in. Jcm 900 50w bias question issue musicians roadhouse. It was founded by drum shop owner and drummer jim marshall, and is now based in bletchley, milton keynes, buckinghamshire. Works perfect the pots could use a lil spray but guarantee this is a solid working amp.
Jcm 900 valve series musical instrument amplifier pdf manual download. View and download marshall amplification 4100 jcm900 h handbook online. Unfollow marshall jcm 900 4101 to stop getting updates on your ebay feed. Marshall jcm 900 model 2100 100watt hi gain master volume. By listening to guitarists from all over the world we know that their needs are constantly changing, demanding more. Marshall jcm 900 model 4500 50watt hi gain dual reverb head.
I like the jcm 900s tone a lot when turned up classic 80s hard rock tone, but the jcm 2000 has better cleans and is much more versatile. Hi, i have a jcm900 4100 and i have recently decided to revalve it. Marshall amp heaven schematics jtm45 jcm50 jcm600 jcm900 jcm 2000. Although not quite the same tone, the amp was just as good for stage use without mods. If i were to choose between these two id go for the 2000 unless i was going for an 80s specific tone and the 900 was a lot cheaper. Asked by mteutsch 177 june 26th, 2008 over the past few months, my 50 watt jcm900 tube amp has started fine. Call us about the marshall amps or guitar lessons at 2567663012. Here you will find our collection of marshall schematics. Theres no denying how great these old tube combos are. An amp built to go on the road and be on the stage with a sound loud enough to fill stadiums. The jcm800 series models 2203, 2204, 2205 and 2210 is a line of guitar amplifiers made by marshall amplification. Marshall jcm900 dualrev 100w 4100 service manual download. Although models 1959 and 1987 had been in production since 1965 and the 2203 and 2204 had been in production since 1975, they were redesigned and introduced as jcm800 amplifiers in 81.
With hindsight, the jcm 900 4102 has its own personality. What is the difference between the marshall jcm 800 and the jcm 900 with 100w higain dual reverb. The only user service possible for most people is to replace all the tubes. Instead of having made one giant pdf out of these scans, ive decided to put the individual schematics and spec sheets online in the sections where.
See the marshall jcm900 schematic for a schematic view of this circuit. Though they share common ancestry and have similar rear panel functions their. I can use the tester efficiently, and can follow the schematic easily. All of these pdf files are available for free download. Marshall schematics tube amp schematics el34 world. This site helps you to save the earth from electronic waste. Marshall tube amp schematics, hoffman amps tube amp schematic library.
There are at least three versions of jcm900s, so if you specify which one you most likely get positive as well as negative postings. When the jcm 900s were introduced, they offered more features and corrected channelswitching capabilities. Legendary tones the marshall shoppers guide part 2. Sovtek replacement tubes kit for the marshall 900 series all models that shipped with el34 tubes.