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In Reply to: NAD T751 and Subwoofer Integration posted by Mick on March 02, 2001 at 14:05:07:
No, there are no main power amp inputs on the T751. I can't think of any easy way to accomplish what you want to do. Some alternatives:- Some subs use a high-level crossover. Probably your crossover could be adapted to do the same thing.
- Change out your crossover for one that allows high-level connection. Energy and Mirage make them for around $300. Paradigm makes a cheaper one (X-30), but it is reputedly less transparent.
- Sell your sub and bass amps and buy a powered sub that allows high level crossover.
- Add a "main in" to the T751. I don't know how feasible this is, and it would void your warranty.Good luck. I'm interested to hear if anyone has another idea.
There's a T751 review online if you're interested.
Dan Bonhomme
Follow Ups:
Else, it sounds like I have two options:(1) Go sub-out, bridge my amp, and run the subs in mono. Two questions:
(a) Is it better if the sub-out sees a 4 ohm or 16 ohm load?
(b) Will I lose the subs in two-channel audio (digital bypass) mode?(2) Buy a separate amp for my mains.
R/ Mick
1. If you want to run the subs from the receiver, I recommend you use a Y-connector on the "sub out", with separate interconnects to the left and right channel of your sub amp (one sub per channel). Dual mono subs seems like overkill, but I don't know the specifics of your situation.Bridging is usually a compromise, but it can work in some instances. If you bridge, series connection would be far better than parallel, because bridged operation with parallel amps and 8 ohm speakers will create a punishing 2-ohm load.
I've heard people say the "sub out" works in stereo on the T751, but it doesn't in my system. I don't use the receiver for stereo anyway, and I don't like a HT sub for music.
2. A separate power amp for the main channels is an obvious solution but I didn't mention it because it's expensive.
As much as I like the NAD receiver, it may be simplest to go with another brand. I doubt if anything in its price range will touch it for music though, if that matters to you.
Dan Bonhomme
I read on the NAD site that the sub-out does work with this amp when playing music. It's in the FAQ.
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