Wiring a subwoofer to monoblocks

Thanks all,
I do not believe the Audiopax are balanced.
As the spec it's two 15 watt amps wired in series to give 30
so I should be ok.
I've seen the resistor idea before.
I'll not be rushing into this in any case, says he feeling
impatience gnawing at his leg:_)
Has brought about some polarisation of ideas on one of the uk sites as some people reckon valve amps (some anyway) can't drive subwoofers/or do bass so the low level input to the sub is the way to go?
I was hoping that the 100 watt amp in the sub would take a bit of a load of the 30 watt amps trying to drive 4 Ohm speakers.
My only experince of subs was a large REL Stentor when I was using a Passlabs X-250. I loved it finding it hard to beleive how much it helped across the spectrum.
Then the wife kicked me out of the lounge into my wee cave
and the Pass and the REL were serious overkill:_(

With my Monoblocks and one REL subwoofer, I have one hot wire (red) to the + speaker post of one amp. The other hot wire(Yellow) to the + speaker post of the other amp. And the ground (black) to the - speaker post of one of the amps (either will do) Sounds great!

I do not believe the Audiopax are balanced.
As the spec it's two 15 watt amps wired in series to give 30
so I should be ok.

I suspect that is not correct, Simon. It may or may not be balanced in the sense of processing out-of-phase differential signals through its internal signal path, but the fact that the secondaries of its two output transformers are apparently wired in series tells me that the two output terminals are most likely balanced (with neither being at ground potential).

In any event, as I indicated above, no harm can come from trying it with sub black connected to amp chassis (or to preamp chassis, as Hevac suggested). Just don't connect sub black to amp black unless you are totally certain that amp black does not have a signal on it.

Regards,
-- Al

'
Simon74 said, "Where's Jim Smith when you need him :_)))"

LOL!!!

Send me an e-mail - jim@getbettersound.com - I can help.
'

Thanks Al,
I really don't want to do harm to the Audiopax as I called in every favour I was ever owed to get them (a nice man on here who will remain nameless).

I hasten to add the reference to Jim was only because I know people who know him and I knew he'd know cause people I know that know,well when it comes to pax or avant garde - he's da man! so I said his name and crossed my fingers:-)
Email on it's way Jim

Rgds to all Simon