the pre-amplifier has 2 sets of output terminals, use one set to connect
it to the power
amplifier for the front speakers using
the usual RCA phono inter-connects. Then use the second set of
output terminals with similar inter-connects to connect the pre-amp
to the Line Input terminal of the ADP-3.
Where the pre-amplifier has only one set of outputs, connect the
output to the Line Input Terminal of the ADP-3 and the Line Input
Terminal to the power amplifier to provide the signal for the
speaker cable, connect the sub-speakers to the ADP-3 Sub-Speaker Terminals
observing the correct polarities.
greater power is required for the sub-speakers.
In this case you should use an extra power amplifier to drive the sub-speakers
which has sufficient power to give the volume required in a large room,
or for entertainment functions and similar events.
the usual RCA phono equipped inter-connects, connect the input of the
extra power amplifier to the Line Output terminals of the ADP-3.
speaker cable, connect the sub-speakers to the speaker terminals of
extra power amplifier.