Mesa/Boogie 55 Stereo Amplifier User Manual


 
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OUTPUT CONTROL :
This control determines the overall output volume level of the amplifier. After the GAIN Controls have been set
for the desired sound style and the three channels levels have been balanced with their respective channel MASTER Controls, the
OUTPUT Control allows you to change the playing volume level of the entire amp by adjust-
ing a single control. The OUTPUT Control is also wired as the Effects Loop Return Level
Control. Should you ever use your Nomad as a power amp alone by inserting a signal into
the RETURN jack, the OUTPUT Control will serve as the master level control.
NOTE: When using the EFFECTS RETURN as an input - to use the Nomad as a power
amp - the SOLO Control can be used to attain a footswitchable boost if the Footcontroller is
connected. It is wired in parallel to the OUTPUT Control and therefore also controls the vol-
ume of the power section.
NOTE: The Effects Loop RETURN jack can serve as a power amp input so that you may use
your Nomad as a power amplifier for either stereo reproduction or to incorporate additional
pre-amps. While the possibilities for this type of application are virtually limitless, there are a
few things to remember that will help you when interfacing to the Nomad for use as a power amp only;
1.) Connect “Dummy” plug or loose cable to SEND jack. ( This prevents any possible loading that could result in diminished RETURN
sensitivity.)
2.) The OUTPUT Level Control will be the only active control on the Front Panel.
3.) The SOLO Control may be used to footswitch in a pre-determined amount of boost when the footcontroller is connected.
SOLO CONTROL :
This control can only be activated if the correct Footcontroller is connected to the Footswitch DIN jack.
SOLO is an additional final output level control wired in parallel with the OUTPUT Control. It is capable of a setting above that of the
OUTPUT Control and can not be set below. The amount of apparent boost also depends on that of the OUTPUT Control - in that if the
amplifier is at either the extreme low or extreme high levels of the OUTPUT, its effectiveness is
minimized. Its been optimized for live performance medium range volume levels.
If the power section is either not a part of the sound (super quiet), or producing all its rated
wattage ( super loud), there is very little signal for the SOLO Control to work with. By using the
Footswitch and selecting SOLO, a pre-settable boost in overall level is possible on the fly...giving
you some control over your levels when it’s time to step out. Engineers may give you a bit of a
frown the first time you use it...but isn’t it time you heard yourself. It might even prevent them from
punishing you with the dreaded monitor or sidefill version of your tone.
HI VOLTS :
Perfect for set breaks... this toggle switch also serves an even more important purpose. When the toggle is in the down
position the tubes are at idle so that during power up they may warm up before being put to use. Before
A.C. Mains is switched on, make sure the switch labeled “HI VOLTS” is in the down position. Wait at
least 30 seconds and then flip this switch to its ON position. This helps in preventing tube problems and
increases their toneful life substantially.
FRONT PANEL CONTROLS: (Continued)
HI VOLTS
ON
AC MAINS
ON
OUTPUT
SOLO
HI VOLTS
ON
AC MAINS
ON
OUTPUT
SOLO
HI VOLTS
ON
AC MAINS
ON