Crazy idea, surround receiver for bi amping.

gasolin

Member
Im looking to optimize my power,sound from my B&W 607 (stereo)

Thinking of a power amp of 150-200 watt pr channel in 8 ohm when it occured to me , why not use a surround reciever for bi amping ?

Many surround receivers can be used for bi amping, using more of the max power the power supply has compared to only using it in stereo.

Im thinking of a nad surround receiver.

For not alot of money, 100 euros theres a huge selection of surround receivers from brands like nad and all the other brands, denon, pioneer,sony,yamaha,onkyo,marantz, you name it

Addition to be able to bi amp speakers and use more of the power the amp has compared to only stereo, theres 2 interesting advantage of using a surround receiver, often the receiver can make aut adjustments improving the sound,frequency response,delay using a microphone and the last, a high pass filter so small front speakers can be cut at 80 hz or lower to improve dynamic power and midrange clarity.

Now comes the question, which surround receivers can be used for bi amping that doesn't cost to much (the value decrease very fast from surround receivers)
 
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dante01

Distinguished Member
An AV receiver shares one PSU between all of its power amp stages. If one requires more power then it diverts that power away from the other amplification stages. There are also other reasons not to utilise an AV receiver for the purpose you propose. AV receivers tend to digitise all inputs regardless of source and the signals are always going to be influenced by the additional circuitry you get within an AV receiver. The AV receiver will in fact be compromising a stereo setup so I'd not suggest you'd be benefitting by using one.

Passive bi=amping isn't really going to be of much benefit anyway, even if using 2 seperate power amps per speaker. Both channels will still be full range. True bi-amping (active) requires that the channels are filtered prior to amplification and this requires some rather specialised speakers and other hardware.

If you need more power then buy a more powerful amp as opposed to passive bi=amping.



You may find this article of interest:
 
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gibbsy

Moderator
If you are thinking of using an AV amp for bi-amping to use for music then better stick with a stereo amp singled amped. AV amps, unless you go to the high end of Arcam, NAD or Anthem, are quite poor at portraying stereo music. I've got a high end Denon that's capable of bi-amping and it cannot complete anywhere near my stereo amp.

The 607s are just a two way speaker and there would be very little to be gained from passive bi-amping for an inferior AV amp.
 

gasolin

Member
I thought that it could be fun to try a surround reciever since many don't cost much

Bi amping, aut adjustment (microphone) and high cut filter around 30-35 hz, additional - 6/12 db .

I can get something like a nad T770 that cost back in 98 over £1000, nad T761 2001 for £61, nad t737 from 2009 under £100

Yamaha, DSP-A2070 for £73 it's 21 kg heavy almost £1800 in 95 try to find Yamhah DSP-A1000 (£1300-1350 when it was new) for £73

You actually can find some pretty heavy, beefy older surround receivers for not alot of money
 

dante01

Distinguished Member
THe treasons why it wouldn't be ideal to use a multichannel AV receiver are already stated above.

To put this into context. You don't ordinaeilly get the same stereo performance from an AV receiver as you;d ezpect to get deom a dedicated stereo inegrated amp costing less if not half as much.

Any AV receiver you buy in order to facilitate stereo performances will automatically be compromised simply due to the fact it is a multicannel AV receiver as opposed to being a dedicated stereo amp. The additional power is neither here nor there if the output has less impressive THD and greater distortion.

Many AV receiver owners use external amplification to improve their multichannel AV receiver's stereo performance.

Do you actually need more power?
 

gasolin

Member
Well, more power in this case would be the power when bi amping, not necessarily more wattage, i guess even a 5x50 watt or 7x50 watt nad reciever would have much bigger power supply than my nad c352

Aut adjustmens and high pass filter also makes me interested in a surround receiver
 

gibbsy

Moderator
A NAD AV amp might sound better than a Denon but will still be way behind a stereo amp. I think you are going up a blind alley looking for improvements by using passive bi-amping from any AV amp. You may also be asking too much of the 607s.

Speakers and the room that they are in are the two most important aspects of any set up. Have you thought of upgrading your speakers?
 

dante01

Distinguished Member
Why do you think you need more power?

I've owned a NAD stereo integrated amp a lot less powerful than any of the AV receivers I've owned The NAD sounded better for very different reasons other than its rated power and neither do the more powerful AV receivers sound better than the less powerful NAD when portraying stereo audio.

Do you actually need more power? Even if you do, simply buy a more powerful stereo integrated or a dedicated 2 channel power amp. You are not gaining anything by using a multichannel AV receiver and by then using it to bi-amp your speakers.
 
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gasolin

Member
My speakes are upgraded

I don't think i need more but want's more for the added control, more clean,dynamic headroom (power).

bi amp more control than power,spl
 
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