The Series EFFECTS LOOP handles outboard signal processing aboard the RA-100 and provides a seamless

The Series EFFECTS LOOP handles outboard signal processing aboard the RA-100 and provides a seamless inter
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face for units that don’t want to be “in front of the preamp˝ such as Delay, Chorus, Flange and Pitch based effects. The Loop SEND is derived
from a source at the end of the preamp and the RETURN is inserted back into the signal path near the input to
the power section. The Loop is basically a patch point at the junction of preamp and power amp and this scheme
delivers the best signal to noise ratio and the least degradation of signal for most outboard devices. The SEND
signal level is determined by the setting of the MASTER volume controls in the Channels and at “normal˝ volume
levels the signal should be appropriate for most processor’s input stage. At extreme levels of the RA-100 - either
very high or very low - it may be necessary to adjust the Input of your processor to avoid distortion (set too high)
or excessive noise (set too low).
Some rack processors have an Input pad that allows selection of both Line (+4db) or Instrument (-20db) level signals and the RA-100 EFFECTS
LOOP SEND signal can fall - depending on MASTER settings - between these two regions. Experiment with your device(s) and use the
Input meter (if available) and the Input attenuator to adjust Input levels until unity gain is reached. If you are unsure, simply yank the SEND and
RETURN cables from the EFFECTS LOOP and if the signal gets louder - you’ll need to increase either Input or Output or both at the processor
and repeat until the level stays relatively the same as you remove and re-insert the processor cables in the Effects Loop.
Overdrive pedals or Gain Boosting devices will usually want to see the guitar’s output signal as a “Send˝ and the front (Front Panel Input) of the
RA-100 as the “Return˝ as using them in the EFFECTS LOOP may cause noise problems, a “mushy˝ attack or even feedback. Wah pedals
also tend to work best in front of the amp.
The RA-100 incorporates switching-type jacks and therefore, when there are no patch cords and/or devices connected to the SEND and
RETURN jacks, the LOOP is BYPASSED.