Surrounds from amp or receiver?
luxun54
Posts: 9
I have just upgraded my 5.1 system to LSi15 fronts and LSiC center; the 3 LSis are powered by a NAD T-955 5-channel amp. My surrounds are FXi30s, which I have left connected to my Yamaha RX-A810 Receiver. Is there any reason I would be better off with the surrounds also coming off the NAD amp, or am I better off letting the amp just run the 3 LSis and continuing to let the receiver run the surrounds? Thanks for your thoughts!
Main HT/Music Room: Polk LSi15 front, LSiC center, FXi30 surround speakers, HSU Research VTF-3 MK3 Subwoofer
Yamaha Aventage RX-A810 A/V Receiver, NAD T-955 power amp
Nakamichi MB-8 CD Player, JVC XV-S500 DVD Player
Weekend Home: Polk RT1000i front, CS3 center, OWM3 surround speakers, PSW505 subwoofer
Pioneer VSX-1017 AV Receiver
Yamaha Aventage RX-A810 A/V Receiver, NAD T-955 power amp
Nakamichi MB-8 CD Player, JVC XV-S500 DVD Player
Weekend Home: Polk RT1000i front, CS3 center, OWM3 surround speakers, PSW505 subwoofer
Pioneer VSX-1017 AV Receiver
Post edited by luxun54 on
Comments
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You have a five channel amp, why not use all five. The surrounds will benefit just as much from the dedicated power supply as the 3 front speakers are.Marantz AV-7705 PrePro, Classé 5 channel 200wpc Amp, Oppo 103 BluRay, Rotel RCD-1072 CDP, Sony XBR-49X800E TV, Polk S60 Main Speakers, Polk ES30 Center Channel, Polk S15 Surround Speakers SVS SB12-NSD x2
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Thanks for the help, trying to learn and understand, but still a little fuzzy, so:
NAD amp specs are:
• 5 x 100W Minimum Continuous Power (8 / 4 Ohms); all channels driven simultaneously
• 150W, 200W and 260W IHF Power into 8, 4 and 2 ohms, respectively
Yamaha Receiver power specs are:
• Rated Output Power (1kHz, 2ch driven) 110W (8ohms, 0.9% THD)
• Rated Output Power (20Hz-20kHz, 2ch driven) 100W (8ohms, 0.09% THD)
• Dynamic Power per Channel (8/6/4/2 ohms) 140/180/210/250W
Front and center speakers are 4 ohm, rear surrounds are 8 ohm.
Given all that, is there much extra power going into the 8 ohm surrounds if I connect them off the amp rather than off receiver? And alternatively, does the NAD amp have more “dynamic” power available for front and center LSi's if only 3 channels are in use (vs. 5), or does that not matter?Main HT/Music Room: Polk LSi15 front, LSiC center, FXi30 surround speakers, HSU Research VTF-3 MK3 Subwoofer
Yamaha Aventage RX-A810 A/V Receiver, NAD T-955 power amp
Nakamichi MB-8 CD Player, JVC XV-S500 DVD Player
Weekend Home: Polk RT1000i front, CS3 center, OWM3 surround speakers, PSW505 subwoofer
Pioneer VSX-1017 AV Receiver -
I would agree with cfrizz, if you got a 5ch amp might as well use it. Im pretty sure the NAD produces alot cleaner power than your receiver. It might not be a huge difference but you probably will get more detail and clarity from your surrounds from the NAD.You have a five channel amp, why not use all five. The surrounds will benefit just as much from the dedicated power supply as the 3 front speakers are.Music doesn't lie. If there is something to be changed in this world, then it can only happen through music.
-Jimi Hendrix -
Thank you to both cfrizz and djperez. I did rewire the surround speakers to the amp as suggested, and agree that there is now more detail and clarity than before, and the sound seems better balanced with the front 3. Thanks for the advice and explanations.Main HT/Music Room: Polk LSi15 front, LSiC center, FXi30 surround speakers, HSU Research VTF-3 MK3 Subwoofer
Yamaha Aventage RX-A810 A/V Receiver, NAD T-955 power amp
Nakamichi MB-8 CD Player, JVC XV-S500 DVD Player
Weekend Home: Polk RT1000i front, CS3 center, OWM3 surround speakers, PSW505 subwoofer
Pioneer VSX-1017 AV Receiver
