Owner`s manual

PAGE 2
FRONT VIEW:
2:50
ON
POWER
ON
STANDBY
PRESENCE A
PRESENCE B
CHANNEL A
CHANNEL B
VOLUME CONTROLS: Channel A & B
Each channel of the 2:50 has its own VOLUME Control. If the amplifier is being fed by sig-
nals from a typical preamp, try a setting of 2 as a starting point. If the amp is being fed by lower-level signals such as those from minus
20db - type effects units, etc..., you may need to raise the Levels
as high as 8.
Remember to turn the VOLUME Control to zero on any channel
not connected to a speaker or load resistor! A Load must be
present at all times when either channels’ VOLUME Control is
dialed to anything other than zero. Failure to comply with this
procedure can cause serious damage to your 2:50’s power
section.
PRESENCE CONTROLS:
Each channel on the 2:50 has its own “active” PRESENCE Control. These controls provide a boost in the
upper mid-range zone, which are the frequencies that tend to
get obscured in the energy of live performance; use them when
you need to cut through a “loud mix.” Use these PRESENCE
Controls with discretion as they can make for some ear damag-
ing, almost harsh sounds if set too high - especially if the Treble
control on your pre-amp is dialed way high.
POWER ON:
First remove the protective covers from the tubes (plastic webbing) before connecting the A.C. cord to a power
receptacle. Make all necessary connections including pre-amp, effects, speakers and instrument before you
flip the STANDBY switch to its ON position.
AC power is turned on via the POWER switch and indicated by the pilot lamp. Before switching on the power,
place the STANDBY switch into its Standby position and allow at least 30 seconds of warm-up time before
switching the STANDBY switch to the ON position. This helps extend tube life by preventing a high voltage turn-
on surge. (However, all of our amplifiers are tested to withstand this extra stress, just in case this procedure is
neglected by the user.)
FrONT PANeL CONTrOLS
ON
POWER
ON
STANDBY
PRESENCE A
PRESENCE B
CHANNEL A
CHANNEL B
ON
POWER
ON
STANDBY
PRESENCE A
PRESENCE B
CHANNEL A
CHANNEL B
ON
POWER
ON
STANDBY
PRESENCE A
PRESENCE B
CHANNEL A
CHANNEL B