\rHi Tom Z;
No the OVC-100 will not work with the BTP650. The OVC-100 outdoor volume control is a passive device that has to connect to the right and left speaker level wires between the amplifier and speaker. The OVC-100 does not add any gain but takes what ever volume level you have and turns decreases the volume (attenuates the level). You only have access to the wire connecting to the satellite speaker but not the speaker in the Master. So no this would not work with any of our current Bluetooth speakers.
TL/4421\r