Seeking suggestions for multi channel amps <$750 US.

Discussion in 'Archived Threads 2001-2004' started by jack x, May 22, 2002.

  1. jack x

    jack x Stunt Coordinator

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    HI All,


    I am a March reservationist for the Outlaw 950 pre/pro. As are many other HTF’ers, I am also in need of a multi-channel amp. I am seeking suggestions for multi channel amps less than $750 US. I am currently looking to get a 5 channel amp and these are on my list as of now:

    ROTEL RMB 1075
    ACURUS A125x5
    ADCOM GFA-7400 5-Channel 100-wpc
    Parasound 5x 85 wpc.

    I have listed these in descending order of typical prices that I have seen for these units.

    I have seen the Parasounds going for
     
  2. GordonL

    GordonL Supporting Actor

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    Marantz MM9000 5 channel 150wpc THX Ultra certified

    I don't own one but mentioned it because it is in your price range.
     
  3. Wayne McRae

    Wayne McRae Stunt Coordinator

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    Jack,I bought the GFA-7400 at my dealer who was getting out of seperates.I got it for $560 inc. a 6 year warranty.Made a good Denon receiver sound a lot better.I'm very happy with it,especially for the $.
     
  4. Brian Treinen

    Brian Treinen Stunt Coordinator

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    Great deals going now on those Parasound amps at ubid! I've not heard any of the three but did just buy a Sherwood AM9080 that I really like, and also easily fits your budget. I scanned audiogon for a couple weeks looking for the right amp and am very happy with the Sherwood. Others on my short list were Rotel and Adcom. The acurus was a little more than I wanted to spend and the Parasound was a little underpowered for me.
     
  5. John A. Casler

    John A. Casler Second Unit

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  6. jack x

    jack x Stunt Coordinator

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    Gordon, Wayne, Brian, John:

    Thank you all for your suggestions.

    I will look into the Marantz unit.

    Glad to hear the positive ADCOM feedback.

    I'll have to research the AMC amp that is for sale.
    ------
     
  7. jack x

    jack x Stunt Coordinator

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    Hi All,

    Further to my request for recommendations for 5 channel amps, can anyone explain what the importance of the "dampening factor" and "S/N ratio" mean in relation to multi-channel power amplifiers? I have seen "dampening factors" ranging from 100 to 400. I have seen S/N ratios from 90db to >115db.

    Also, what about the input sensitivity?

    I am wondering how important when comparing the specifications of amplifiers.

    Lastly, I haven't seen many amps that have double the RMS output at 4ohms as at 8 ohms. typical seems to be about 50% more watts output at 4ohms. eg. 100 watts rms @ 8 ohms; 150 watts @ 4 ohms.


    Thanks again!
    Jack
     
  8. Ricky T

    Ricky T Supporting Actor

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    Jack,

    Doubling into 4 ohms is just marketing BS. 90% of amps (monos to 5 channel) will exhibit ~ 1.55 - 1.75 ratios in LAB TESTS (ie, same distortion into 8 and 4 ohms); I don't really care about mfg specs.

    I think a damping factor over 100-200 is fine for most speakers and systems.

    I have a MINT parasound 1205a for sale (email me if interested).

    Ricky
     
  9. Tung Enkhych

    Tung Enkhych Extra

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    do all of the above amps use Torroidal transformers or do some use E-core(etc.)??????
    I seem to remember that some flagship rcvrs use toroids and some do not(Elite 49?)....
    Given that the pre-pro part of a rcvr doesn't take much current ,I would like to see current draw specs on some of these amps vs that of flagship rcvrs...anyone have this info?
     
  10. jack x

    jack x Stunt Coordinator

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    Thanks Ricky T and Tung for your replies!

    RickyT or anyone else- can you explain what the dampening factor means with regard to amp specs? I have seen some 2-channel Rotel amps with dampening factors from 500-1000.

    Also, can anyone explain what the S/N ratio actually means in regards to an amplifier? Again the Rotel amps seem to have some of the higher ratios I've seen.

    Thanks!
    Jack
     

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