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post #1 of 7 Old 08-14-2014, 02:05 PM - Thread Starter
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what should i do?

I have an onkyo tx-nr809 which is 130W per channel at 0.08% distortion. then i have an Adcom GFA-545II which is 100wpc at 0.02% distortion. my question is would i get better sound if i use the Adcom as my power amp, or should i just leave them connected to the onkyo? My speakers are bi-amplified currently to the onkyo. thanks
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post #2 of 7 Old 08-14-2014, 02:09 PM
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Originally Posted by aeliayousaf View Post
I have an onkyo tx-nr809 which is 130W per channel at 0.08% distortion. then i have an Adcom GFA-545II which is 100wpc at 0.02% distortion. my question is would i get better sound if i use the Adcom as my power amp, or should i just leave them connected to the onkyo? My speakers are bi-amplified currently to the onkyo. thanks
You should try both ways and see which sounds best! You may find it sounds better with the Adcom powering your fronts, especially if you're also running a center and surrounds.
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post #3 of 7 Old 08-14-2014, 02:16 PM - Thread Starter
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Originally Posted by djp2k7 View Post
You should try both ways and see which sounds best! You may find it sounds better with the Adcom powering your fronts, especially if you're also running a center and surrounds.
hmm yes, i might just have to experiment. i was just concerned about the wattage. 130w over 100w.
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post #4 of 7 Old 08-14-2014, 05:21 PM
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There is so little difference in wattage and distortion that it could well end up being a wash sound wise. I would try both ways and see what you like best. That is the fun of this hobby.

Alan in Boise

103 inch AT screen with 9.x playback. IB sub woofer system. Two manifolds with 2 15s and 2 12s. Line array with 2 15s. Running main channels with Minimus 7s. Have front wide and front hight and rear surrounds. Room is perfect size for smaller speakers like the Minimus speakers. Approx. 17x13x8. Tower speakers were taking up to much room.
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post #5 of 7 Old 08-14-2014, 11:38 PM
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No real difference in power if that's the whole story.

There is possibility the Adcom works better into lower impedance loads which could be of help ( even 8 ohm speakers dip down to lower impedances potentially.)

Yeah, I would say experimentation is your best option

That Adcom must almost be a classic by now

"But this one goes up to 11"
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post #6 of 7 Old 08-15-2014, 10:50 AM - Thread Starter
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No real difference in power if that's the whole story.

There is possibility the Adcom works better into lower impedance loads which could be of help ( even 8 ohm speakers dip down to lower impedances potentially.)

Yeah, I would say experimentation is your best option

That Adcom must almost be a classic by now
Yes its a classic now

So I tried both, and there was minimum difference. The Onkyo sounded a little louder, maybe by 2-5%. but overall hardly any difference. Only advantage at this point in using the Adcom would be less stress on the Onkyo front channel.
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post #7 of 7 Old 08-19-2014, 01:31 PM - Thread Starter
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I ended up going with the Onkyo amp. I also experimented with the bi-amping (which i had setup initially), and I noticed no difference there too (bi-amping vs. regular). I ended up using the 7 channels and added surround rears and front high speakers, and what a big difference that makes. Adding more speakers IMO was a better way to go.
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