if you bridge, then there are only two channels for the stereo, and the subwoofer (SW) needs
to have its own amp and the ability to pass high freq or treble signals back out.
so, the preamp outputs go to the SW and the treble gets fed back to the to remaining channels
but you'll have a problem if the two power amps are not identical - the volume setting may be
tricky if one amp is more powerful and/or different sensitivity than the other.
your better bet is to get a crossover, use it to feed treble signals to one of the power amps,
then feed the bass signals to the other amp which then has the SW hooked up.
or simply with one pair of speakers use only one power amp and decide how the SW is
hooked up (this depends on whether the SW has an amp and how it filters the signal)
What Bob is talking about is bi-amping, not bridging, but it will work, You won't gain power but it does have it's benefits. But, he is right that it does help if both amps are the same
I don't have those particular units but, from my NAD 214 manual it says:
0) Turn the power off.
1) Flipping a switch on the back to put it into the bridge mode.
2) You feed the mono signal into the left input.
3) You connect the speaker to the right and left "+" terminals.
Repeat the process for the other amp.
It helps if the amps are the same,
Be aware that a bridged amp will see the speakers impedance as one half it's rated impedance. That's to say it'll see an 8 ohm speaker as four ohms and a four ohm speaker as two ohms. Keep that in mind. I was advised by the people that sold me the 214 to not use my four four ohm Maggies with these amps in bridge mode.
Assuming your Velodyne sub is a powered sub, you would connect it to the pre-amp's output. You do NOT want to use that "Y" connector to combine the right and left channels. Feed the two pre-amp outputs to the two line level inputs on the sub.
Thanks Skipper.Since my pre-amp does not have a dedicated SW hook-up what about that ?Remember, we can't see what you have so drawing a picture is out of the question. That, plus my skills in that area suck,.
I tried to simplify the steps involved as simply as possible in post five. If that doesn't help you, well, then I have nothing more I can offer. ...sorry.
You're of course correct.Thank you for your help.I've already covered this twice. Once in each of my two posts,
Reread post five, paragraph 10 and for a bit more detail, reread post seven, paragraph three
You've really got to put a little effort into reading and trying to understand the answers you've been given,