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Seeking suggestions for multi channel amps <$750 US. (1 Viewer)

jack x

Stunt Coordinator
Joined
Feb 27, 2002
Messages
56
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
 

GordonL

Supporting Actor
Joined
Feb 14, 2000
Messages
771
Marantz MM9000 5 channel 150wpc THX Ultra certified

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

Wayne McRae

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Joined
Dec 28, 2000
Messages
234
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 $.
 

Brian Treinen

Stunt Coordinator
Joined
Aug 10, 1999
Messages
135
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.
 

jack x

Stunt Coordinator
Joined
Feb 27, 2002
Messages
56
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.
------
 

jack x

Stunt Coordinator
Joined
Feb 27, 2002
Messages
56
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
 

Ricky T

Supporting Actor
Joined
Oct 28, 1999
Messages
921
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
 
Joined
May 22, 2002
Messages
18
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?
 

jack x

Stunt Coordinator
Joined
Feb 27, 2002
Messages
56
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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