O . A/C POWER OUTLET—(120V models only) This outlet
is convenient for plugging in a rack mounted device
that you may have installed in the Redhead Rack Space
{W}. The power requirement for this outlet must not
exceed 3A, 360W. NOTE: Power is always ON at this
outlet whenever the Redhead is plugged in even if the
Redhead is switched OFF.
P .
IEC POWER CORD SOCKET—Connect the included
power cord to a grounded AC electrical outlet in
accordance with the voltage and frequency ratings
specified on the rear panel of your amplifier.
Q . INTERNAL SPEAKER—Connection for the internal
speaker. This output is controlled by the Internal Speaker
Switch {M} on the front panel. Read Speaker Guidelines
on page 10 before changing speaker connections.
R . EXTERNAL SPEAKER—Connect an external speaker
cabinet here using either the Speakon® or 1/4" phone
jacks. The speaker must be 4Ω minimum and capable of
handling 350 watts. Read Speaker Guidelines on page 10
before making speaker connections.
S . TUNER OUTPUT*—Plug your tuner in here for convenient
instrument tune-ups. Use the Mute {A/J} switches to
disable audio output while tuning.
* NOTE: The rear panel 1/4" jacks {S, T and U} are balanced TRS (Tip/Ring/Sleeve) types:
Tip=positive (+)
Ring=negative (–)
Sleeve=ground.
While standard shielded TS (Tip/Sleeve) "mono" guitar cables may certainly be used, the use of "stereo" TRS cables may improve
signal-to-noise ratio and/or reduce hum, especially when longer connections are required.
Rear Panel
T . EFFECTS LOOP*—Connect Send to your effects device
U . TUBE DI*—Tube driven, transformer coupled outputs
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input and Return to the effects output. NOTE: Any
effects device with a "WET/DRY" control should be set
to the fully WET position to prevent phasing problems
and any "INPUT LEVEL" should be set as close to 0dB as
possible.
The Send output includes onboard tone shaping. Send
level is primarily controlled by Gain {C}. The Return input
is a line level signal that can be blended in any ratio with
the onboard preamp signal using Effects Blend {L}.
The Effects Loop circuit is on a "side chain" of the main
circuit (as in studio recording consoles) to provide the
full sound of your instrument AND the diversity of your
effects units. This also reduces noise from effects units
by being located after gain in the signal path.
suitable for connection to studio and "front-of-house"
(live) mixing consoles. These true electronically balanced
jacks are line level outputs in order to maximize the
signal to noise ratio. To avoid clipping (especially with
the XLR output) make sure to set the console input level
to "LINE LEVEL" or reduce the Tube DI output level using
the Pad {J} control.
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