Will this amp work for these speakers? (1 Viewer)

[Tubby]

This is the amp im looking at:
Buy Nady XA-900 Pro Stereo Power Amp online at Musician's Friend

Is this amp 200watts per ch in 8 ohm mode? Making it 400 watts total? I am looking to power these speakers:
Polk Audio RTi A7 Floor-standing speaker at Crutchfield.com

Or could i bridge it at 8 ohms and run these?:
Polk Audio RTi A9 Floor-standing speaker at Crutchfield.com

 

[Tubby]

Or could i just bi amp the rti a7's with my onkyo tx-sr606?

 

[Tubby]

Or could i just bi amp the rti a7's with my onkyo tx-sr606?

 

[Tubby]

Or could i just bi amp the rti a7's with my onkyo tx-sr606?

 

[Mark Sherman]

200 wats on a pair of Plks Should be fine. what are you goiung to use as a pre amp?

 

[Tubby]

Not sure i didn't know i needed a preamp. Can i just bi amp from the onkyo receiver? that would give it 180watts to each right? Because im only doing a 2.1 setup.

 

[Mark Sherman]

If your Onkyo has a preamp out you can use that. I world Just use the amp and Bypass the onkyo's amp section.

 

[JohnRice]

I sense a power outage coming on.

 

[Robert_J]

Is the amp going to be in the listening room or an equipment closet? Like most of the cheaper pro amps, the fan will sound like a small airplane. I had to swap the fan out on my Behringer EP-2500 for an ultra quiet model. Also that Nady is designed for live concerts.

I suggest that you go for a studio amp like the Behringer A-500. Check out the 4th review that compares it to the Nady.

-Robert

 

[Tubby]

The behringer looks good. One thing though.... would i be able to just bi amp the polk rti10's with my onkyo tx-sr606? Its 90x7 so they would get 180 each. Would that work? Im only doing 2.1, not 5.1 or 7.1

 

[Robert_J]

Read your instructions and see if your receiver is able to biamp. But really, to me this level of equipment won't show enough improvement to justify the extra work or money put into biamping. Maybe if you were running Eggleston and Krell gear it would.

I'll try to answer your PM here if you post it. By keeping it private, it is a disservice to the community. This is a knowledge base. If someone is searching for a similar question, they will never see it or the answer because it was conducted over PM.

-Robert

 

[Tubby]

Sorry about the pm Robert. Yes my receiver is able to bi-amp. Its 90x7 Wouldn't that double the power giving it 180 watts? Will this be sufficient power or do i need a separate amp? It won't be much of a problem.... all i have to do is run wire from the second surround speaker outs to the polks.

 

[Robert_J]

No, it will not give you 180w. That would be bridging the amp which receivers can't do. It will give you 4x90w. You would connect 1 channel to the woofer input of the speakers and 1 channel to the tweeter input of the speaker. Repeat for the other speaker. In a perfect world, doubling the power will get you 3db more output but we hardly ever max out our systems anyway. That is extremely loud. In the real world, power compression robs you of some output so you are looking at about 2db or less. You may get lower distortion but can you really hear the difference between .5% and .25% THD? Differences that small are difficult to measure let alone hear.

As a disclaimer, I have never done this. I run a Pioneer VSX-1014 and DIY speakers that I invested less than $100 each in parts. It sounds great to me but I think I have pushed everything to the limits in quality. I can get more return on my money with proper calibration, subwoofer equalization and room treatments to quiet down some nasty echoes.

-Robert

 

[JohnRice]

To elaborate on what Robert said. The benefits of bi-amping are typically minimal, particularly when doing it with this type of equipment. Basically what you are doing is peeling off the high frequencies and powering them separately. The problem is, the high frequencies require very little power, so there is, in most cases, no measurable or audible benefit. You get infinitely more benefit from using a properly set up subwoofer. If you already have that, you are pretty much good to go.

Also, even if you did bridge (which you can't) you wouldn't get double the power. Most amps (and most definitely not amps in receivers) don't double when bridged.

 

[Tubby]

Thanks for the replies guys. If I go with some floorstanding speakers I will buy an amp.