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How should I hook up my amplifier to my receiver?

post #1 of 7
Thread Starter 
I am currently running a Marantz SR7400 receiver. I have in my garage a Niles SL-275 amplifier:
http://www.nilesaudio.com/product.php?prodID=SI-275&recordID=Stereo+Power+Amplifiers&categoryID=System+Integration+Amplifiers&catcdID=4&prdcdID=FG00770 EDIT: Link fixed
My Marantz SR7400 does have pre-outs for all channels, although I am planning to run the Niles amp only for the front L/R as it is a stereo amp.

My questions are as follows,

1. How do I connect the SR7400 to the amp? From what I have read I connect the pre-out L/R channels to the inputs on my Niles SL-275. Is that correct?

2. How is volume controlled? Do I still control the volume with the Marantz SR7400?

3. I see on the back of the Niles unit that it can either be always on or use "voltage trigger". My Marantz has a "DC Out" on the back that seems to take the same 3.5mm connector. Do I connect the two and that turns the amp on when it is needed?

I would consider my audio knowledge to be "intermediate" so to speak, I know a good amount about basic home audio but many of the complexities I still need to learn. So any help OCN's audio experts can provide me is greatly appreciated!
Edited by Mygaffer - 10/28/11 at 10:35pm
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post #2 of 7
Youre link isnt working but thats ok,

1. Yes that is correct.
2. The volume will still be controlled via your receiver, it will just adjust the level of the preout to your amplifer.
3. Yes that is correct. Your receiver just sends a signal to your amp to turn on when it does.

Seems like you have everything under control smile.gif
post #3 of 7
Thread Starter 
Quote:
Originally Posted by Bouf0010;15490522 
Youre link isnt working but thats ok,

1. Yes that is correct.
2. The volume will still be controlled via your receiver, it will just adjust the level of the preout to your amplifer.
3. Yes that is correct. Your receiver just sends a signal to your amp to turn on when it does.

Seems like you have everything under control smile.gif

Thanks for the info. I hooked it up tonight and it sounds great, I am the definition of someone on a budget so I have been putting together my setup over the last few years with whatever deals I came across.

Here is a pic of the unit all hooked up:
11m43s0.jpg

The only problem I have now is that the 12v isn't working. I plugged it in from the 12v out on my Marantz and plugged it into the 3-30v input on the Niles unit, then moved the switch to the voltage control, it didn't start playback. Maybe I have to enable it on the Marantz unit?Yes I do, enabled it and now it works fine.

Anyway, I am almost content with my setup now. I have a pair of CSW Tower II speakers that are too large for my room, so they act as speaker stands until I get a bigger place. I was using Boston CR9's but one of them just starting cutting out. If I could score some really nice stereo speakers I think I would be all set.
Edited by Mygaffer - 11/25/11 at 8:42pm
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post #4 of 7
Thats awesome! im happy that it all worked out.

Im in the same boat when it comes to getting everything to work on a budget, i have 2 12" subs running off an old car amp i had which is powered by my HTPCs power supply lol works great and sounds awesome too!

I would try and use the towers anyways. How big is your room?

As for the 12V signal, it could be a setting on the receiver itself, i have mine set up so that they turn on when the computer does.
post #5 of 7
Take care that your receiver doesn't overheat.
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post #6 of 7
Yeah, I wouldn't put an anything directly on top of a receiver, especially not another heat source.

It's possible the trigger is simply broken. Just deal with turning it on/off manually. That's what I do with mine smile.gif
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post #7 of 7
Thread Starter 
Quote:
Originally Posted by gorb View Post

Yeah, I wouldn't put an anything directly on top of a receiver, especially not another heat source.
It's possible the trigger is simply broken. Just deal with turning it on/off manually. That's what I do with mine smile.gif

I had to turn on the trigger in the Marantz unit, now it works. The Marantz is actually kind of a hot unit but since it isn't actually driving the speakers it doesn't seem to get too hot. I've attached rubber feet to the Niles amp and I have an active fan I was using but at this point neither gets too hot so I've stopped using it.

Really happy with my setup. I've yet to really come across the perfect front pair speakers but that day will come. Of course now I have the itch to buy some monoblocks but talk about expensive!

Oh yeah, the person who asked about my room size, we are talking ~8'x10', that may be a foot or so short on either end though, I'd have to measure.
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