Biamping Receivers - AVS Forum
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post #1 of 15 Old 05-30-2005, 02:21 PM - Thread Starter
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Has anyone had any experience with biamping a 7.1 A/V receiver by redirecting 2 of the surround channels to the front speakers? Does it make any real difference to sound quality when listening to stereo music? Also, can all 7.1 receivers be biamped in this way or are only certain receivers set up to do this? I believe the following have manufacturers' instructions for biamping:
Arcam AVR-250 and AVR-300
Marantz SR-7500 and SR-8500
The new Pioneer Elite line.
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post #2 of 15 Old 05-30-2005, 02:51 PM
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Audioholics had a good write up of using the "other" channels to biamp a denon 3805

http://www.audioholics.com/productre...5_review04.php

--nw
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post #3 of 15 Old 05-31-2005, 05:04 PM
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you can bi amp or bridge the integra 10.5 i bridged it only noticed improvement at insane volume levels.
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post #4 of 15 Old 06-01-2005, 11:28 AM
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Just found out today that you can use the back L/R channels on a NAD T773 to biamp your fronts. If you have a couple splitters and interconnects and the extra wire, give it a wirl. I know I'll be doing it with my 773.

Kevin
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post #5 of 15 Old 09-15-2005, 02:52 PM
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I looked in the online manual and couldn't figure out a way to do this. Can you tell me how you did it with the splitters and interconnects?

Thanks

Toshiba 57HDX82, Hughes E86, Pio Elite 56TXi/59AVi, NHT 2.5i, Marantz 4000 OSE, Silver Audio Hyacinth, Tributaries SP4, Sennheiser 580, Headroom TA Amp
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post #6 of 15 Old 09-15-2005, 03:50 PM
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Any one know if this can be done with the HK635 ?

Steve
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post #7 of 15 Old 09-15-2005, 05:31 PM
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Quote:
Originally Posted by youngjun91
I looked in the online manual and couldn't figure out a way to do this. Can you tell me how you did it with the splitters and interconnects?

Thanks
I think I figured it out for the T773. There are basically jacks for pre amp outs and power amp ins (pretty unique feature!), so by replacing the stock "jumpers?" with some splitters and interconnects you can connect the fronts to BOTH the fronts and unused rears on the amp section.

Toshiba 57HDX82, Hughes E86, Pio Elite 56TXi/59AVi, NHT 2.5i, Marantz 4000 OSE, Silver Audio Hyacinth, Tributaries SP4, Sennheiser 580, Headroom TA Amp
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post #8 of 15 Old 09-15-2005, 07:18 PM
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I'm not convinced this will have any noticeable benefit, but my Pioneer 1015 supports bi-amping.. so a couple of banana plugs and some speaker wire and I'll have it done. My Klipsch F-3s are set up for bi-amping too.

Odd to bluejeans to order the plugs.

Anyone else do this and hear a difference, or does it just make you feel better?
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post #9 of 15 Old 09-16-2005, 08:41 AM
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The latter, although some people have a real problem with the distinction. ;)

No matter where you go. ... There you are.
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post #10 of 15 Old 01-02-2006, 04:53 AM
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I have compared different scenes filled with sound effects, both with and without bi-amping in VSX-1015, but I can't notice any difference.

In which way is the sound supposed to be improved using the bi-amping mode in VSX-1015?

Does the receiver deliver more power the front channels in that mode?
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post #11 of 15 Old 07-09-2006, 04:56 PM
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I've tried biamping my NAD 773 and have noticed a significant improvement in the dynamics and low end grunt. I've even experimented with the biamp configurations:

1. Mains amp for left speaker and back surround for right speaker
2. Mains amp for mid/woofer and surround back for tweeters

I have noticed a difference in overall balance, but am not sure why given that both the amps should be identical. If anyone can shed any light on this I'd appreciate it.
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post #12 of 15 Old 07-09-2006, 05:38 PM
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I have recently done this with a Yamaha 5990 and a pair of Polk Monitor 70's. The resulting performance change is so noticeable that it sounds like a completely different pair of speakers.

I know lots of folks won't believe me. I have the option of going back to the 7.1 and putting the bridge bars back in place if I want, but no way. The low end and the "punchiness" of the speakers was completely lacking beforehand, something I had no idea of, until I bi-amped them.

I'm now considering purchasing separate amps so I can get the 7.1 back, but no way I'm going back to a single amp connection for those towers.

I was honestly shocked at the improvement. I had read lots of people say that with my type of equipment I wouldn't see any real difference, but they were wrong.

The Yammy has a switch that will turn the surround back amp into the mains amp.
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post #13 of 15 Old 07-09-2006, 07:44 PM
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Quote:
Originally Posted by Schwingding
I know lots of folks won't believe me. I had read lots of people say that with my type of equipment I wouldn't see any real difference, but they were wrong.
people, here on this forum, get very negative and angry at the mention of bi-amping. Don't know why? So I don't mention the term anymore (even though I just did).
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post #14 of 15 Old 07-10-2006, 06:04 AM
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Quote:
Originally Posted by WestCoastD
people, here on this forum, get very negative and angry at the mention of bi-amping. Don't know why? So I don't mention the term anymore (even though I just did).
Passive bi-amping may make a moderate difference if the speakers that are being driven are difficult loads and/or the amps being used are not as powerful as they should be - so whether people hear a difference or not very much depends on the equipment being used.

And you know this audio game - it's like religion when it comes to opinions so it's not surprising that arguments ensue when people make generalizations about what others should hear without taking into account the type of equipment that's being used.

An interesting and informative article on passive and active bi-amping can be found here.

I refuse to prove that I exist," says God, "for proof denies faith, and without faith, I am nothing." ~ D.Adams
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post #15 of 15 Old 07-10-2006, 08:36 AM
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Quote:
Originally Posted by AdrianMills
Passive bi-amping may make a moderate difference if the speakers that are being driven are difficult loads and/or the amps being used are not as powerful as they should be - so whether people hear a difference or not very much depends on the equipment being used.
Yes, the benefits of passive bi-amping are marginal. Mainly, you get the unproven (and even mystical) benefits of bi-wiring as well as increased headroom.

However, bear in mind that the amps in most AV receivers do not have separate power supplies and do not really deliver their "rated" power per channel when more than 2 channels are driven. Many deliver FAR below their "rated" 2-channel power and the THD goes up as well when multiple channels are driven.

So you're sorta "shooting yourself in the foot" if you passively bi-amp with most mid-fi AV receivers.

"All men are frauds. The only difference between them is that some admit it. I myself deny it."
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