Master Volume Question.

[Sean B]

I currently play live with a small 1x12 combo (always with my band's pa support). I use an svt type clone pedal straight into the 1x12 power in, using the 1x12 combo's master dial to control volume. For bigger gigs or more stage volume, I'm dragging out a heavy head and silly heavy 1x15 cab, and using both rigs (bypassing their preamps). Long story short, I'm looking at cheap used 1x15 combos. Found a couple, but one (Peavey TKO 75) appears to have no master. Am I right in assuming that my signal (via Peavey's power in) will be wide open or at full volume? Not really an issue I suppose as I can control the volume being sent from the pedal, but just curious. I should mention I'm intending on running both combos together.

 

[beans-on-toast]

Normally a master volume is an attenuator at the end of the preamp. If you are plugging into a power amp in, the amp’s volume will be controlled by the level that your are sending it.

The power amp sensitivity spec for the TKO 75 is 1 Vrms (see the manual). That is the voltage required to drive the power amp to full power at the power amp in jack.

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[Sean B]

Normally a master volume is an attenuator at the end of the preamp. If you are plugging into a power amp in, the amp’s volume will be controlled by the level that your are sending it.

The power amp sensitivity spec for the TKO 75 is 1 Vrms (see the manual). That is the voltage required to drive the power amp to full power at the power amp in jack.

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Thanks. Will probably try and pickup a used Tech 21 VT unit at some point and ABY it into both small combo's power amp in jacks.

 

[basscooker]

Yeah as far as I know most "power amp in" are wide open. It's effect returns that can sometimes be controlled from the amp. Just like an amp with no master is the same as if it had a master and it is all the way open.

 

[beans-on-toast]

Thanks. Will probably try and pickup a used Tech 21 VT unit at some point and ABY it into both small combo's power amp in jacks.

I use a VT in that way, also into the input jack. I find it a good low cost option for driving a power amp.