skullduggery Posted January 20, 2006 Share Posted January 20, 2006 First off Hello everyone.I'm usually hanging out on the bass forum.Today a friend gave me a Marshall combo amp.It's a jcm900 master gain mkill,50 watt 2x12 combo.I really know nothing about this amp.Is it a good amp?Does anyone know where I could get a manual for it with a scematic possibly?It has an ohm selector on the back that I don't understand.One side is 8 ohms and the other says 4(16) ohms.What would my options be if I wanted to run an extension cab with or without the 2x12's that it has in it.Also it has hi/lo mode switch.Any info would be much appreciated.Thanks~~Jay "Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything. Plato Link to comment Share on other sites More sharing options...
s mel gibson1642606968 Posted January 21, 2006 Share Posted January 21, 2006 Marshall has a website. Just google for it. I have a JCM 900/100w Hi Gain Dual Reverb 2x12 combo and it works real good. Nobody can tell you it isn't any good when they can't hear their own amp over yours. Link to comment Share on other sites More sharing options...
EmptinesOf Youth Posted January 21, 2006 Share Posted January 21, 2006 Hey there. i wish my friends just gave me amps. I think this is the model- http://www.harmony-central.com/Guitar/Data/Marshall/JCM_900_4502_Dual_Reverb-1.html theres some customer reviews about it. GOt a pretty good score and people seem to be happy with it so it cant be too bad. I was thinkin that maybe the ohm switch IS for an extension, and you can select the correct output for the Ohms of the cab. For the hi/lo...a boost maybe? i have no idea... Link to comment Share on other sites More sharing options...
Rhino Madness Posted January 21, 2006 Share Posted January 21, 2006 Welcome to the guitar side! Here is a link to the manual of the JCM900 Dual Reverb amp . Even if it's not exactly the same model as yours, it should provide you with most of the info you need. Good luck with that amp! Link to comment Share on other sites More sharing options...
rw2003 Posted January 21, 2006 Share Posted January 21, 2006 A JCM900 50 Watt 2x12 combo for FREE??? Very nice. The JCM900 series appeared in 1990. The hi/lo switch will switch the amp into 25 watt mode. Here are some links to the Marshall website and others... http://www.marshallamps.com/heritage/jcm900/jcm900_01.asp http://www.drtube.com/marshall.htm#JCM900 http://www.kbapps.com/audio/schematics/tubeamps/marshall/JCM900-50W.html http://www.freeinfosociety.com/electronics/schemview.php?id=490 http://www.legendarytones.com/ask_us_10.htm "Spend all day doing nothing But we sure do it well" - Huck Johns from 'Oh Yeah' Click to Listen to Oh yeah Link to comment Share on other sites More sharing options...
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