Using spare AVR as poweramp?

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k_vijay12

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I am planning to upgrade my AVR from Yamaha rx-v471 to Denon 3700( mostly) or 4700.

Before planning to invest in Poweramp, plan to use my yamaha avr in stereo mode and power anh 2 channels. Output would be about 85wpc at 8 ohm.


Anybody tried this way and what's your experience like ? I guess regular stereo amps giv much better sound. But still want to hear your views.

Also any of you using D class power amps for fronts / LCR? Reviews/ feedback please
 

thedude

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I use my AVR as pre and Nuprime monoblocks as power amps to drive front towers.

nuprimes have XLR/RCA switch that helps me go from stereo to HT in a jiffy and vice versa.

PS: my cousin upgraded from a very old Yamaha to Denon 2400h and he’s not liking it. He prefers fidelity from the Yamaha. Make your choice carefully.
 

Dwaipayan

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I am planning to upgrade my AVR from Yamaha rx-v471 to Denon 3700( mostly) or 4700.

Before planning to invest in Poweramp, plan to use my yamaha avr in stereo mode and power anh 2 channels. Output would be about 85wpc at 8 ohm.


Anybody tried this way and what's your experience like ? I guess regular stereo amps giv much better sound. But still want to hear your views.

Also any of you using D class power amps for fronts / LCR? Reviews/ feedback please
I have a RXV475 and was also looking for a similar implementation. However, it looks like we will have to physically mod the AVR and disconnect the pre-amp power amp sections and then solder some RCA inputs to the power amp to avoid making the signal pass through both pre-amps. It looks pretty complicated and the risk of destroying the circuit is quite high for which I finally abandoned the idea.

Also, when comparing my PM5005 (40Wpc) to my AVR(80Wpc in stereo mode), I feel that the amp gives a much fuller output and the volume is pretty loud even at 25%-30%.
 

rpmahale

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No need to modify old AVR . Just connect Pre-out of new AVR to one on the line input of old AVR . Adjust or calibrate the input signal level on new AVR and output gain on old AVR Step by step. You may check my post on Marantz owners section where I have sucess connected Denon AVR 2113 as a power amplifier for Marantz NR1608 AVR. Its difficult if you don’t have Per-out on new AVR and still wish to use old AVR as PA.
 

fLUX

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I am planning to upgrade my AVR from Yamaha rx-v471 to Denon 3700( mostly) or 4700.

Before planning to invest in Poweramp, plan to use my yamaha avr in stereo mode and power anh 2 channels. Output would be about 85wpc at 8 ohm.


Anybody tried this way and what's your experience like ? I guess regular stereo amps giv much better sound. But still want to hear your views.

Also any of you using D class power amps for fronts / LCR? Reviews/ feedback please

Why do you want to do this, rather sell the AVR and get a good power amp. The X3700H/4700h already provide more than 100 watts @ 2 ch @ 8ohms and adding a lower range AVR as PA might not really be beneficial to your experience
 

k_vijay12

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Why do you want to do this, rather sell the AVR and get a good power amp. The X3700H/4700h already provide more than 100 watts @ 2 ch @ 8ohms and adding a lower range AVR as PA might not really be beneficial to your experience
Not for LCR, may be surround or Atmos
 

k_vijay12

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I have a RXV475 and was also looking for a similar implementation. However, it looks like we will have to physically mod the AVR and disconnect the pre-amp power amp sections and then solder some RCA inputs to the power amp to avoid making the signal pass through both pre-amps. It looks pretty complicated and the risk of destroying the circuit is quite high for which I finally abandoned the idea.

Also, when comparing my PM5005 (40Wpc) to my AVR(80Wpc in stereo mode), I feel that the amp gives a much fuller output and the volume is pretty loud even at 25%-30%.
No need of such complex stuff, use ur old avr in stereo mode and use the new avr preouts to connect with component-in of this old avr. This should work.
 

ssf

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Not for LCR, may be surround or Atmos
As @fLUX remarked, adding a lower powered receiver to a higher powered receiver (even for surround or Atmos) isn't going to get you many benefits. It might even degrade the sound.

Further, I am using 2 Crown XLS 2502s (Class D) power amp that puts out around 450 watts per channel to power the LCR of my Marantz 7010. I am only using this setup as I already have these amps with me and I want to reduce the load on my AVR so that it won't heat up as much. For all other purposes, the AVR is good enough on it's own in my room (26 by 10 / open dining and kitchen) for my listening levels.
 

k_vijay12

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Why do you want to do this, rather sell the AVR and get a good power amp. The X3700H/4700h already provide more than 100 watts @ 2 ch @ 8ohms and adding a lower range AVR as PA might not really be beneficial to your experience
Denon 3700/4700 give about 90wpc in 5 channel bench test and 70-75 WPC in 7 channel mode.

Assuming I use 7 channels from avr ... I can use yamaha avr in stereo mode which give 85wpc in stereo mode.. I can add this to Atmos...the quality of the yamaha avr may not be on par with denon, but I think it gives enough power to drive 2 Atmos I think. Please correct me if my understanding is wrong on this.
 

fLUX

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If taking the load of your AVR is the primary reason then theoretically yes it helps to some extent, but at anytime not all your 7 channels are engaged in your AVR and its the front 3 (LCR) which are mostly engaged, followed by surrounds and very rarely the atmos, so adding a power amp in the front stage benefits the AVR load immensely as against adding for atmos/surrounds . I would suggest get away with the VX471 and purchase a PA like Crown XLS for front LR or LCR (2 Crowns) if its purely to do away with the load.

Also the Polk TL1500/1600 are not power hungry speakers, I would suggest to first upgrade speakers then think of getting a PA.
 
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