AMP Suggestions

derouyag
derouyag Posts: 28
edited December 2010 in Electronics
Hello,

I have an Onkyo TX-NR808 Receiver. I am looking for a #? channel amp that does not require special power requirements. What suggestions do you guys have?

I am going to dump the bi-amping of the TSI400s and add about 6 OWM-5 speakers for the Back, Surrroud, and Front Highs.

This is what I am thinking, but I don't know how the amp thing will work with it.

Front: TSI400
Front Wide: TSI200
Center: CS20
Back: OWM-5
Surround: OWM-5
Front High: OWM-5
Sub: Cerwin-Vega CX12S
Main Home Theater
Receiver: Onkyo TX-NR1008
Fronts: TSI400 (bi-amp)
Rears: TSI200
Center: CS20
Sub: Cerwin-Vega CX12S
Monitor: Samsung UN55C6300 LED
Post edited by derouyag on
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  • ken brydson
    ken brydson Posts: 9,022
    edited November 2010
    derouyag wrote: »
    Hello,

    I have an Onkyo TX-NR808 Receiver. I am looking for a #? channel amp that does not require special power requirements. What suggestions do you guys have?

    I am going to dump the bi-amping of the TSI400s and add about 6 OWM-5 speakers for the Back, Surrroud, and Front Highs.

    This is what I am thinking, but I don't know how the amp thing will work with it.

    Front: TSI400
    Front Wide: TSI200
    Center: CS20
    Back: OWM-5
    Surround: OWM-5
    Front High: OWM-5
    Sub: Cerwin-Vega CX12S

    Budget? New vs used?
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  • derouyag
    derouyag Posts: 28
    edited November 2010
    Budget <$2,000
    New.

    Can I power the Back, Front Wide, Front High from the Receiver without any issues? These are separate choices for the Onkyo TX-NR808 anyway; only two of these six speakers can run at any one time.

    Would this mean I could get away with a 5 channel amp, which would include the 2 channels from the receiver?
    Main Home Theater
    Receiver: Onkyo TX-NR1008
    Fronts: TSI400 (bi-amp)
    Rears: TSI200
    Center: CS20
    Sub: Cerwin-Vega CX12S
    Monitor: Samsung UN55C6300 LED
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  • rdb2001
    rdb2001 Posts: 791
    edited November 2010
    I dont really think you need an amp with the speakers you have. Personally, if that was my budget for an amp, I would sell those speakers and work on better speakers plus an amp. Thats just my humble opinion, others with chime in.
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  • derouyag
    derouyag Posts: 28
    edited November 2010
    Based on my understanding of the amp, it basically has two channels of 135w each shared out to the 7 channels. So if I am right the max power would be 270w.

    Each of the speakers in my array, will handle 150w. If I wanted to deliver REALLY CLEAN power to each speaker, I would power each with 300w of dedicated power to a max of 50% amp power. But that won't happen and is really over kill. So it would be nice if I could at least give each speaker a dedicated 125 to 175 watts of power.

    So if my understanding of my receiver is correct, I could supply 135w of power to two of those six speakers; which are not really important channels anyway.

    Now if I could supply 125 to 175 dedicated watts to the fronts, center and surrounds, then the system could have a realistic total wattage of about 850 watts w/o sub power instead of the 270 watts from the receiver. I get the impression that the receiver is really not powering my current speakers all that hard, but may be pushing them into distortion only because it is drawing from the upper portions of the receivers amplifier.

    I would like to see the speakers pushed to their limits using only half of the power of the amplifier.
    Main Home Theater
    Receiver: Onkyo TX-NR1008
    Fronts: TSI400 (bi-amp)
    Rears: TSI200
    Center: CS20
    Sub: Cerwin-Vega CX12S
    Monitor: Samsung UN55C6300 LED
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  • ben62670
    ben62670 Posts: 15,969
    edited November 2010
    You can drive 5 channels via an amp and run the surrounds on the receiver. When amp shopping don't get too hung up on watts. A good amp with 100-200wpc will pleasently surprise you.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • txcoastal1
    txcoastal1 Posts: 13,519
    edited November 2010
    I shopped and love my Sunfire for HT 200watts@8ohm, 400@4ohm just a little over 2g's...This will give you the head room to better your speakers...IMO
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • derouyag
    derouyag Posts: 28
    edited November 2010
    ben62670 wrote: »
    You can drive 5 channels via an amp and run the surrounds on the receiver. When amp shopping don't get too hung up on watts. A good amp with 100-200wpc will pleasently surprise you.
    Ben

    I was looking at the Adcom GFS-7607 or 7605. If I got the 7605, I would probably push the front, center, and surround; 7607 add the back or front wide speakers. Would the 7607 be too much?
    Main Home Theater
    Receiver: Onkyo TX-NR1008
    Fronts: TSI400 (bi-amp)
    Rears: TSI200
    Center: CS20
    Sub: Cerwin-Vega CX12S
    Monitor: Samsung UN55C6300 LED
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  • derouyag
    derouyag Posts: 28
    edited November 2010
    txcoastal1 wrote: »
    I shopped and love my Sunfire for HT 200watts@8ohm, 400@4ohm just a little over 2g's...This will give you the head room to better your speakers...IMO

    Does this amp require a 20amp electrical source or 15amp? I don't want to do a dedicated 20amp wire to my stereo. I want to stick to the normal limits of a house... 15 amp. Even if I need to power it from a different room to get it on its own circuit is fine; but not 20amp.
    Main Home Theater
    Receiver: Onkyo TX-NR1008
    Fronts: TSI400 (bi-amp)
    Rears: TSI200
    Center: CS20
    Sub: Cerwin-Vega CX12S
    Monitor: Samsung UN55C6300 LED
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  • txcoastal1
    txcoastal1 Posts: 13,519
    edited November 2010
    15 amp is fine...its also on a Furman elite-15 PFi conditioner.
    2-channel: Modwright KWI-200 Integrated, Dynaudio C1-II Signatures
    Desktop rig: LSi7, Polk 110sub, Dayens Ampino amp, W4S DAC/pre, Sonos, JRiver
    Gear on standby: Melody 101 tube pre, Unison Research Simply Italy Integrated
    Gone to new homes: (Matt Polk's)Threshold Stasis SA12e monoblocks, Pass XA30.5 amp, Usher MD2 speakers, Dynaudio C4 platinum speakers, Modwright LS100 (voltz), Simaudio 780D DAC

    erat interfectorem cesar et **** dictatorem dicere a
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  • cfrizz
    cfrizz Posts: 13,415
    edited November 2010
    You will be fine running it off of the 15amp. I have a Sunfire 405wpc 5 channel amp running all of my speakers and it sounds great. Get a 200wpc @8ohms amp and you are good to go for years to come.
    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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  • ben62670
    ben62670 Posts: 15,969
    edited November 2010
    derouyag wrote: »
    I was looking at the Adcom GFS-7607 or 7605. If I got the 7605, I would probably push the front, center, and surround; 7607 add the back or front wide speakers. Would the 7607 be too much?

    The older 75xx series is much better and cheaper.
    Buy used. If you don't like the sound sell it without a loss or even a profit. I had a GFA7500 and at 150wpc with 5 channels it was more than enough.
    Ben
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • HTguru1982
    HTguru1982 Posts: 1,066
    edited November 2010
    I agree - get used if you can. Use the money you'd save and upgrade your speakers. The TSi's are good for their price but you can get better results with the RTi series. You can even opt for the LSi's if you want the best Polk has to offer.

    I have the Adcom GFA7000, 135wpc and it does a great job powering my RTi's. When I using just my Yamaha receiver, I had to turn the volume up to about -35db to get good volume. When I added the Adcom, I can only turn it up to about -47 before it becomes ear deafening. Adding that amp was the best thing I've done to enhance my system. And I only paid $150 for it too.
    Display: Sony 42" LCD
    Sources: Harman Kardon DVD-27,
    Panasonic DMP-BDT110 blu ray player
    AVR: Sony STR-DA2400ES
    Amps: Sonance Sonamp 260(fronts),
    Kenwood KM-894(surrounds)
    Fronts: NHT 2.5
    Center: NHT VS-1.2A
    Surrounds: NHT Super One
    Subwoofer: SVS PB10-ISD
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  • ben62670
    ben62670 Posts: 15,969
    edited November 2010
    150wpc 5 channel Adcom GFA-7500 around $350. Better than Emo.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • derouyag
    derouyag Posts: 28
    edited November 2010
    ben62670 wrote: »
    150wpc 5 channel Adcom GFA-7500 around $350. Better than Emo.

    Now where can I find one of those for $350.00?
    Main Home Theater
    Receiver: Onkyo TX-NR1008
    Fronts: TSI400 (bi-amp)
    Rears: TSI200
    Center: CS20
    Sub: Cerwin-Vega CX12S
    Monitor: Samsung UN55C6300 LED
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  • ben62670
    ben62670 Posts: 15,969
    edited November 2010
    Keep searching. Ebay and Audiogon.com
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben
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  • derouyag
    derouyag Posts: 28
    edited December 2010
    Has anyone looked at the Onkyo PA-MC5500 amp for their Onkyo Receiver?

    I noticed that the specs say:

    150 watts minimum continuous
    power per channel, 8 ohm loads, 2
    channels driven from 20 Hz to
    20 kHz, with a maximum total
    harmonic distortion of 0.05% (FTC)

    I am confused about this spec "2 channels driven..." stuff when the amp is a 9 channel amp.

    My 1008 Receiver says 135 watts "2 channel driven..." then goes on to show 135 watts for each separate channel.

    Both say s/n 110db so would that mean the amplifier would only give an additional 15 watts per channel?
    Main Home Theater
    Receiver: Onkyo TX-NR1008
    Fronts: TSI400 (bi-amp)
    Rears: TSI200
    Center: CS20
    Sub: Cerwin-Vega CX12S
    Monitor: Samsung UN55C6300 LED
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