FUNCTION SWITCHES (Reverb, EQ & REV, EQ): These 1/4" jacks are used to control the Reverb
and/or the EQ functions using the optional footswitches.
For controlling the Reverb alone or the EQ alone, connect our Single Footswitch to the appropriate
jack using a 2-conductor unshielded cable. If you’re using the Dual Footswitch to control both
reverb and EQ, plug it into the center (EQ & REV) jack using a 3-conductor (stereo) cable.
The function jacks can also be used to control the reverb and EQ from an external switching system
such as the MIDI Matrix.
EFFECTS LOOP: The Effects Loop in the Preamp has a mono (single) send and stereo (dual)
returns. This means you can incorporate stereo effects devices in the loop and the signal will be
maintained in full stereo all the way through to the outputs. The Effects Loop Level switch should
be set according to the type of effects you are using. For floor pedals (and some "inexpensive" rack
effects) select the "LOW" position. When "studio-quality" or line0level effects are in use, select the
"LINE" position. If your effects device also has a switch of this kind, make sure the settings of both
switches coincide.
MAIN OUTPUTS: This pair of 1/4" jacks is intended primarily for connecting the Preamp to a
power amp. Its output level is determined by the OUTPUT LEVEL controls on the front panel. If
you are using some type of stereo effect in the Preamp’s Effects Loop, then the Main Outs function
as a stereo pair. If you’re not using a stereo effect, they function simply as two mono outs (in other
words, the content of Main Output A will be the same as the content of Main Output B). If you’re
operating the Preamp in mono and you are feeding into a mono or single power amp input you can
use either Output A or Output B - it makes no difference.
RECORDING OUTPUTS: This pair of outputs (also 1/4" jacks) has been specially EQ’d and
buffered to simulate the sound of a power amp loaded by speakers, for use in "direct inject" record-
ing situations when the Preamp is plugged directly into a mixing console. Like the Main Outs, the
Recording Outs function as either a stereo pair or as two mono outputs (depending on whether
you’ve got a "stereo-izing" device in the Effects Loop or not) at levels determined by the front panel
OUTPUT LEVEL controls.
USING THE PREAMP AS AN "EFFECT BOX": Another excellent use for the Recording Outputs is
for connecting the Preamp to the input of a normal guitar amplifier such as a Fender, Marshall, etc.
The Preamp then becomes a super "effect box", adding Tone, Gain, Footswitching, Distortion, EQ,
Reverb, and en Effects Loop to the normal capabilities of your amplifier! The Recording Outs can be
connected straight into the front panel input of the amp (there’s no need to attempt to bypass the
amp’s preamp section) and should not require any radical alteration of your normal amp settings.
LINE FUSE: A 1 1/4 amp fuse protects The Studio Preamp when operating on 100-120 V. AC.
Should the fuse blow, replace it with a Slo-Blo fuse of the same amperage.
LINE CORD: This is a standard 3-pin AC line cord. A ground-lifting (3 to 2) adapter may be found
useful in eliminating hum cased by grounds loops when the Preamp is connected to a power amp.
(This problem would not tend to arise when running into a mixing console).
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