Balanced power amp and subwoofer connection.

So is it a MJ acoustics sub? What model? Also which Pass?

no, it a BK electronics, UK made, sub and XA30.5 power amp.

The MJ one was damaged and disposed of. Their quote for repair was too high and when I declined to have it repaired, they refused to send it back to me unrepaired and threatened legal action claiming I would try to sell it on an auction site as new which of cause is crazy. One call from my legal adviser had the dead unit back in two days. A very nasty company ! The unit was personally disposed of at a recycling centre.

Thanks.

Connect the red Speakon wire to the red output terminal of the right channel on the amplifier.

Connect the yellow Speakon wire to the red output terminal of the left channel of the amplifier.

Connect the black Speakon wire to the binding post on the rear of the amplifier that is labelled "ground" or "signal ground" or something similar. DO NOT connect the black wire to either of the black speaker output terminals of the amplifier.

This assumes that you are using just one sub, rather than a separate sub for the left channel and for the right channel.

Can an av and hifi amp be connected to one sub designed for Hifi and home cinema amp connections at the same time.

Looking at the manuals for a couple of the BK subs, it appears that some or all of them are designed to accept high level (Speakon) and low level (RCA or XLR) connections at the same time, with independent gain controls being provided for the high level and low level inputs.

You should not, of course, connect the high level outputs of two amplifiers at the same time, or damage will result.

If the sub provides both RCA and XLR low level inputs, I would also avoid using both of those low level inputs at the same time. I doubt that damage would occur, but depending on the specific design sonics may be adversely affected.

Regards,
-- Al

Hi. Thanks for that, much appreciated.
Regards.