Markbass Studio Pre - Manual (Page 18)

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effeCT seND AND ReTURN
If you use effect pedals or rack gear, you can route them through the SEND EFFECT (32) and RETURN EFFECT (34) jacks on the rear panel of the amp. The effects loop is wired in parallel with the CLEAN CHANNEL—this
means that if something happens to your effects chain (a battery dies or a cable gives out, for example) while you’re playing, you will not lose your main signal.
fOOTsWITCH
The STUDIO PRE’s optional footswitch has two on/off switches. One bypasses the AMP CHANNEL, removing any distortion you have added to your signal, as well as any equalization and filtering dialed on this channel.
The other switches the PURE PARAMETRIC FILTER in the CLEAN CHANNEL on and off. Red LED (6) on the front panel illuminate when the footswitch (PPF) is activated.
mIX lINe OUT
The balanced XLR (36) output allows you to send the blend of the CLEAN and AMP channels directly to a mixing console (either in live or studio situations) without the need of a DI box. Simply connect a standard
XLR cable from this output to the soundboard/mixing console, or a snake connected to the board/console, or a soundcard with XLR inputs.
The unbalanced 1/4” jack (35) output allows you to connect the preamp to an amplifier, soundcard or any recording hardware that accepts unbalanced signals.
These two OUTS have a fixed level that depends only from the GAIN level.
gROUND lIfT OUT
Occasionally when using the MIX LINE OUT (36), the engineer will detect a hum from your amp’s signal. This is almost always due to a grounding problem related to your power source; you will likely eliminate this
hum simply by flipping the GROUND LIFT OUT (37) switch.