Marshall JCM 2000 DSL 100 Head

toneseekr

New member
if i put the volume on 2 would that be 25 watts cuz ima play a show on the 16th and i have a celestion greenback thats 25 watts and dont wanna blow it out. i dont care for anyother speakers and dont wanna know about anyother speakers. thanks
 
Re: Marshall JCM 2000 DSL 100 Head

I don't think that's a good idea. It might be putting out more than 25W at 2 on the volume, especially if you hit it hard.
If you blow your speaker it will probably seriously damage the rest of your amp. Not worth the risk.

I hear even the chinese celestions can take a little more than what they're rated for, and who knows you might get away with it for an hour. You could try mismatching the impedance to get less power from the amp to drive the speaker less, or remove 2 power tubes and run 50 W, and try it that way. But be warned and try not to blow your amp!
 
Re: Marshall JCM 2000 DSL 100 Head

I don't know if you are being serious or not, but that will not play out well... The appropriate way to use a Celestion Greenback with a hundred watt head is to use a 4x12 loaded with them. Otherwise you will more than likely blow that speaker.

Cole
 
Re: Marshall JCM 2000 DSL 100 Head

question # 1. if i remove the two power tubes to make it a 50 watter will i need to get professional help to take them off and put them back after the show? and yea ima try and run them in a 4x12 cab that is 16ohms and disconnect the bottom crappy speakers and only use the celestions like this, with a vintage 30(16ohms) on the left and a celestion greenback(16ohms) on the right. its a little store ima play at. question #2. what do you guys think if i run the volume at 1 3/4?
 
Re: Marshall JCM 2000 DSL 100 Head

I always go by the lowest watt speaker, so I still wouldn't use the DSL [even at 50 watts by pulling 2 power tubes] with that setup... how many different speakers are in that cab? It sounds like you need one those 15 watt DSL heads that just came out.

Cole
 
Re: Marshall JCM 2000 DSL 100 Head

Is this guy serious!

Rent or borrow a cab.

For my mere amusement, what's you speaker rated?

Also, why would you want to run your DSL on 1 for a live show!!!!!!!
 
Re: Marshall JCM 2000 DSL 100 Head

if i put the volume on 2 would that be 25 watts cuz ima play a show on the 16th and i have a celestion greenback thats 25 watts and dont wanna blow it out. i dont care for anyother speakers and dont wanna know about anyother speakers. thanks

My hero!
 
Re: Marshall JCM 2000 DSL 100 Head

yea the show is gonna be great forsure, but would i need professional help to reinstall the tubes or take them off? cuz i have no idea what is up with rebiasing this is my first tube amp, help please
 
Re: Marshall JCM 2000 DSL 100 Head

I really would not attempt to use that combo of amp and speaker man.... You could possibly wreck your amp.
 
Re: Marshall JCM 2000 DSL 100 Head

Yep a singe 25 watt greenback might get through 2 songs if you are lucky. You need at least a pair of 50 watt rated speakers if you want to make it through a set bro! If you are lucky you will just nuke the speaker if you are not so lucky be prepared to buy an output trans for that DSL. DON'T DO IT!
 
Re: Marshall JCM 2000 DSL 100 Head

Ill give you a few hints 100 watts is a average rating. During loud peaks and transients it will actually put out more than 100 also it is a "clean" rating. Its taken at a low level of total harmonic distortion its easy to push them past this. When I was in university for giggles we benched my 50 watt JMP using a test signal and the amps master on about 8 it was putting out 90 watts! Trying to just arbitarily guess which number on the knob your speaker will be safe at is just plain silly. You risk damage to your amp and your speaker. If you really want to use greenbacks use at least 2 and keep the volume very low. If you pull 2 tubes (which is a horrible idea it sounds like dog pewp at best) you have to cut the impedance in half. This might create a mismatched load that is an even worse idea for your head.

If you do what your planning and you hit the strings hard you risk causing spikes more than the speakers rating and killing it. That simple and you cant guess on a knob where a certain wattage is. Now dont be silly just man up and do things right you say this is your first tube amp so im not sure why your in such a hurry to ruin it.
 
Re: Marshall JCM 2000 DSL 100 Head

So the sweep is on.....how many song do we think the speaker will last??

We need some odds for each option
 
Re: Marshall JCM 2000 DSL 100 Head

ok for the most part, i REALLY appreciate the people that try to help. i played my Marshall with the od 1 channel, gain at 9 and a ibanez ts9 (overdrive at 1 to get more of the marshall, tone at at the center which is at 5 and the volume at 9 to push the amp) and the 25 watt greenback last night to see how it will sound at the show and the volume of the amp was at 2 and i played it for like 3 hours (i only need 30 mins for the show by the way) and the speaker didnt pop, the amp was ok. AND i was picking hard as f*ck the whole time and using a dunlop purple, thick as **** pick. i suspect that the Marshall od 1 channel and the ibanez ts9 together was compressing it. thoughts and suggestions?
 
Re: Marshall JCM 2000 DSL 100 Head

Thoughts and suggestions seem to be pretty consistent here. Get a cab that can handle the power of the amp properly. You're doing yourself a disservice by doing anything but that. Use the right tools for the job. I mean, you wouldn't play baseball in a pair of golf shoes simply because they have spikes, would you?
 
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