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NAD T751 and Subwoofer Integration

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Mick

Will be buying an A/V Receiver soon and have a question:
I have two subs I used in stereo in my audio setup. Off of the preamp stage of my home-brew integrated tube amp the signal goes to an active xover. Lo-pass out goes to a Perreaux stereo amp and then to subs. Hi-pass out goes back to the tube amp power section to drive mains. I am going HT so wish to replace the tube amp (it will be used elsewhere, audio only) but want to have similar setup as described above with the A/V Receiver I purchase.
Since audio AND cost is important it looks like the NAD T751 is best bang for the buck. I like the fact that the audio signal remains analog, especially through volume control. But can I hook up my subs as described above? Does the T751 have Main preamp out and amp in? If not, how would you recommend I hook my subs up for best possible audio?
Thanks!!
R/ Mick

Follow Ups:

Re: NAD T751 and Subwoofer Integration Audio Fan 16:01:56 03/02/01 (3)
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
- T751 Review
- Is there an A/V Receiver with Amp-Ins? Mick 17:04:10 03/02/01 (2)
  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
  - Re: Is there an A/V Receiver with Amp-Ins? Audio Fan 00:01:34 03/03/01 (1)
    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
    - Re: Is there an A/V Receiver with Amp-Ins? Pogo 17:21:43 03/08/01 (0)
      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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