Nace PRO-18 User Manual - page 10
10
PRO-18 USER MANUAL
REV A
CHAPTER 6 NOTES ON THE V-POWER* CONTROL
A common problem with practice vs. stage playing is to get the same
tonal characteristics at practice that you get on stage. Consider that on
stage you set the gain control to get the pre-amp distortion that you desire
and then set the master volume to get just the right amount of power amp
distortion. Now, take these same settings home to practice, and your wife,
kids, and/or neighbors will run you out of the house. So now you have to
reduce the master volume to reasonable levels in order to keep peace in
the neighborhood but your tone is now messed up.
Another scenario is, while on stage, the audio engineer wants you to
reduce output level. Here, again, you must compromise between tone and
proper stage setup.
Nace Amps has invented a solution to this problem. The V-POWER*
front panel control. This control allows you to set the output power level
without affecting the master volume and gain control settings thus keeping
the tone you want but at lower output levels. Typically from 1 Watt peak
(464 milli watts average) with the V_POWER* control fully counter
clockwise to 27 Watts peak (18 Watts average) with the control fully
clockwise and all power levels in-between. This is not a half power switch
that eats power or removing tubes form the power amp section but an
electronic circuit that controls the actual gain of the power tubes (EL84s) to
control the output power without changing the tone of the amp.
Now you have it all. A practice amp and a stage amp all in one
amplifier.
*The V-power circuitry is Pat. Pending