Effects Loop
The RD1 has an effects loop, which is a simple, low impedance, series loop.
The SEND socket is for connection to the input of effects units. On the RD1 it is a lower impedance
version of the signal that appears at the INPUT. Use the send to connect to floor pedals or rack effects
such as Delay, Chorus and Reverb etc. Effects such as Overdrive, Fuzz, Wah Wah and Tuners often give
better results plugged into the Instrument Input on the front panel. The Send socket can also be used on
its own to send a signal to another amplifier.
The FX Loop also incorporates a Mix control which allows you to vary the amount of effects signal that is
returned to the amplifier from any external pedals or effects processors plugged into the FX Loop. This
can be varied between ‘Dry’ (no effects in the signal) and ‘Wet’ (fully effected signal).
The RETURN socket is for connection to the output of effects units. When not used it is internally
connected to the SEND, therefore the EFFECTS LOOP can be ignored if not in use. It can also be used as a
small signal ‘Slave’ input from another amplifier but DO NOT plug an amplifier’s speaker output into the
Return socket or very bad things will happen.
The RETURN socket is also very useful for fault diagnosis. If your RD1 doesn’t produce any sound, (or
makes some weird noises) when played, plug the guitar directly into the RETURN socket and play. This
bypasses the entire pre-amplifier section and sends the guitar signal through just the output stage. If
sound is now heard then the problem is in the pre-amp section and is likely to be a faulty pre-amp valve.
