#1
I just moved from a head to a pre/power amp set up and I cannot wrap my head around it. Here is the back of the pre and power amps

Pre: http://medias.audiofanzine.com/images/normal/engl-e530-tube-preamp-modern-rock-420684.jpg

Power: http://www.chrisguitars.com/rocktron-velocity100.jpg


I am running a 4x12 cab and I used to run my head on mono (16->16ohm connection). I have some questions:

1) What is with the 4 outputs on the power amp? I assume I just need one if I run mono?
2) Any benefit to run stereo instead of mono?
3) I see a ch1 and ch2 on the power amp.. and I have a left and right out on the pre amp. Should I hook one to each channel and run stereo cab, 1 output from each ch to the amp?
4) If I run 8 ohm out, to a 16 ohm cab (mono), that is OK right?


How would you hook this up?
#2
Quote by hxcmetal724
I just moved from a head to a pre/power amp set up and I cannot wrap my head around it. Here is the back of the pre and power amps

Pre: http://medias.audiofanzine.com/images/normal/engl-e530-tube-preamp-modern-rock-420684.jpg

Power: http://www.chrisguitars.com/rocktron-velocity100.jpg

I am running a 4x12 cab and I used to run my head on mono (16->16ohm connection). I have some questions:

1) What is with the 4 outputs on the power amp? I assume I just need one if I run mono?


it is designed as a 'stereo' amp, meaning it has two independent power amps in there. each power amp (channel) has it's own input level knob on the front, it's own input jack in the back and it's own set of speaker outputs (two per channel).

so each channel has two outputs, the reason each has two is because those two are wired together in parallel and it allows each channel to facilitate two cabinets. so technically your power amp can run 4 cabinets.

Quote by hxcmetal724
2) Any benefit to run stereo instead of mono?


well it looks like you don't have a choice in the matter, your amp is exclusively a stereo amp, it has no mono (bridged) operation unless you just wanna use one channel and not use the other one.

stereo would allow you to create a controllable stereo audio field, which you can use to give spatial depth to your tone. it also would allow you to mix different tones but using different pedals/equipment for each channel

Quote by hxcmetal724
3) I see a ch1 and ch2 on the power amp.. and I have a left and right out on the pre amp. Should I hook one to each channel and run stereo cab, 1 output from each ch to the amp?


yes. something like:

preamp left output -> power amp channel 1 input
preamp right output -> power amp channel 2 input

i don't know what you cabinet situation is. if you cabinet only has a mono setting then you need another cab to plug channel 2 into a cab as well.

if you 4x12 is stereo then you just run the power amp outputs the L/R inputs on the 4x12.

Quote by hxcmetal724
4) If I run 8 ohm out, to a 16 ohm cab (mono), that is OK right?


your power amp is solid state, this means the '8 ohm' rating on the back mean the amp requires a minimum of 8 ohms, so any load 8 ohms or larger should be fine. so yes, you can plug the power amp up to a 16 ohm cabinet. you'll lose a bit of volume from this, but i wouldn't worry too much about it.
punk isn't dead, it's always smelled that way.

"A perfection of means, and confusion of aims, seems to be our main problem."
-ae
Last edited by gumbilicious at Jul 31, 2013,
#3
Thank you very much. That does clear really clear it up about the number on the speaker output being the minimum. I plan on running it stereo now once I get more cables (oh yay...). Using this diagram, I should be good to go right? (Marshall 1960AV cab so it runs 4/16 mono and 8/8 stereo)

#4
yup, that would work
punk isn't dead, it's always smelled that way.

"A perfection of means, and confusion of aims, seems to be our main problem."
-ae