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Old 17th December 2007, 06:37 PM   #1
Sin Bin
Join Date: Aug 2007
Default Bi-Amping.....Which one where?

Hello all. I am running a Bi-Amp system and not sure what amp to use for what app. The 2 amps that I have are a NAD2100 and a Kenwood Basic M2A. It is a simple single 4 ohm 10" sub with 4 ohm 2-way bookshelf speakers. I have been running the NAD on the 2-ways and the Kenwood on the sub (just using one channel). Heres the thing ( isn't there ALWAYS a "thing?) I have found out that the NAD IS stable down to 4 ohms bridged. The Kenwood isn't bridgable at all to the best of my knowledge.

Any thoughts on what should be used where?

Thanks for the help, Ken
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Old 17th December 2007, 07:54 PM   #2
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Join Date: Jan 2006
Location: Avalon Island
Can you share a little more about the amp specs?
I don't have them all memorised.
[Grasshopper]:Old man, how is it that you hear these things?
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Old 17th December 2007, 08:19 PM   #3
Bigred is offline Bigred  Canada
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Join Date: Jul 2007
I really wouldn't called that bi-amping or running a bi-amp setup in the purest sense. Anyways why not experiment with both arrangements? Its the best way really. With bookshelf speakers as your mains I seriously doubt you need gobs of power for the sub. I'd say the the NAD on the sub with the Kenny for the mains would be the best configuration.
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Old 17th December 2007, 09:24 PM   #4
Sin Bin
Join Date: Aug 2007
I don't have much for specs for the Kenwood except it is rated at 220 watts per channel into 8-ohm loads and over 300 watts per channel into 4-ohm loads with dynamic range over 300 watts per channel into 8 ohm and over 500 watts per channel into 4 ohm loads.

On the NAD I have a bit more.

Continuous output power into 8ohm * 60W (17dBW)

Rated distortion (THD 20Hz - 20kHz) 0.03%

Clipping power (maximum continuous power per channel) 70W

IHF Dynamic headroom at 8ohm +6dB

IHF dynamic power (maximum short term power per channel)
8ohm------ 200W (23dBW)
4ohm------ 250W (24dBW)
2ohm------ 330W (25dBW)

Damping factor (ref. 8ohm, 50Hz) >100

Input impedance 10kohm / 600pF

Input sensitivity (for rated power into 8ohm) 0.85V

Frequency response 3Hz - 100kHz / +0, -3dBdB

Signal/noise ratio ref. 1W 100dB

ref. rated power 117dB

THD (20Hz - 20kHz) <0.03%

------------Bridged Mode----------------

Continuous output power into 8ohm * 100W (20dBW)

IHF Dynamic headroom at 8ohm +7dB

IHF dynamic power (maximum short term power per channel)
8ohm--------- 500W (27dBW)
4ohm--------- 660W (28dBW)

The NAD specs are from their own spec sheet. I am thinking that it would be better to bridge the NAD for the sub and run the Kenwood stereo for the 2-way's. But I also know that alot of other things come into play other than just power ratings. Slew rates, damping factor, etc. I wish I had more on the Kenwood but info on that old amp is hard to find. Power ratings are it.

Again, thanks for the input

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