Question about Yamaha RX-V490 Receiver

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Yamaha RX-V490 Amp

Can I use a seperate amp and use this unit as a pre-amp?

Posted by carton on

  • carton Nov 11, 2007

    Thank you for your reply and explanation. The reason I was asking is because I think that the new RX-V659 model will except a seperate amp (If I understand it correctly). I am not for sure though. I want to buy a GAS Son of Ampzilla amp and be able to use the RX-V659 as a pre-amp. Is it possible to do this or is it the same as my RX-V490?

  • carton Nov 11, 2007

    Thanks for the quick response. I will post what I find out when the time comes!!



1 Answer

Cory Kielion

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The easy answer...

Absolutely NOT.

This is by all means a standard receiver. It in itself is an amplified unit. You would have to run the speaker ports to the input ports on the second unit.

If you do that, you'd have all kinds of problems. The most likely one being that you'd simply overload the input ports on the other unit.

It is never a wise idea to amplify an output signal into another unit that is just going to amplify it again anyway.

The bigger thing to keep in mind is that the input ports on the second unit just are not designed to take that kind of wattage. They're designed to take a few mW to a few W at most. Y'know?

I realize it's called an "amplifier" and all, but it's only meant to amplify the source signal to a level where it's audible through speakers.

A 'true' amplifier is meant to amplify a signal into a high-power monitor; such as a guitar amp, etc.

Please don't try to do this. I'd hate to see you lose a perfectly good receiver to something like that! :P

Good thinking, though. At least you're thinkin' up ideas on how to improve something. :)


Posted on Nov 10, 2007

  • Cory Kielion
    Cory Kielion Nov 11, 2007

    Ah. You had not mentioned another model number before...

    Also, we get confused on the terminology. You see... There are "amplifiers" and then there are "receivers".

    Both of these systems are technically "receivers".

    But looking at the manual for the RX-V659, I now see what you are intending to do.

    You're intending to use the Ampzilla to power the speakers. But you're going to use the RX-V659 as the pre-amp.

    It could honestly work. I was under the impression that you were wanting to link two RECEIVERS together; using one of them as the pre-amp into the other.

    Oddly enough, I looked at the manual for the RX-V659 and found that it has pre-amp inputs for each channel. But it looks like they use specialized amps for each channel. The RX-V659 must be one mean machine to be using pre-amp inputs.

    But you want to link the RX-V659 to the Ampzilla from what I am now interpreting.

    I don't see why you couldn't. You'd just run the speaker outputs from the RX-V659 to the inputs on the back of the Ampzilla. I'm not sure how many channels the Ampzilla is capable of using. I would assume only two, of course. But it's doable.

    You'd just have to be sure to moderate and balance the two systems. Don't put too much current from the speaker outputs of the RX-V659 to the inputs on the Ampzilla. The problem with running a setup like that is that the RX-V659 is not designed to operate like that. There could be frequency or resistance differentials that you may or may not be able to balance properly or compensate for. You may wind up with distortions, etc with the end result.

    Hard to say. But if you do try it, post your results. I'd be interested to see how it works.

    Hell... I can't honestly say that I've never done what you're talking about doing before. I used a basic 1,000-watt guitar amp system to increase the output from a receiver...which had a Nintendo 64 connected to it. We used it to amplify Goldeneye 64 to a bass amp and about 6 monitors. *laughs*

    Man... THOSE were the days!

    Anyway... Yeah. Let me know what you come up with. :)

    Good luck.


    The best I can tell you is you're going to have to experiment. If it sounds good and you don't get any interference or crosstalk, etc... Then it's probably a workable setup.

  • Cory Kielion
    Cory Kielion Nov 12, 2007

    By the way...

    If we are done here for the time being, how about a rating for me? :)

    Either way, just post your results. *nods*

    Hope the rating is good. (If I've sufficiently answered your questions, go ahead and give a "Solved" rating to indicate that we have arrived at a solution.)




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