What amp for Monitor 70's - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 17 Old 02-03-2014, 07:24 AM - Thread Starter
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So I've got a Monitor 5.1 setup-25c (center), Monitor 70's (mains), 35 b's (surrounds). I feel that my Denon AVR 1613 is a little lacking for the Monitor 70's especially for music. What stereo power amplifier would you recommend for them or would you recommend a more powerful receiver? Keep in mind I am on a fairly tight budget hence the monitor series and not the rti series. Thanks!

Specs for Monitor 70
http://www.polkaudio.com/products/monitor70II

Specs for Denon Avr 1613
http://usa.denon.com/us/product/pages/productdetail.aspx?catid=avreceivers(denonna)&pid=avr1613(denonna)
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post #2 of 17 Old 02-03-2014, 07:25 AM - Thread Starter
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Sorry these are all Polk speakers. I thought I posted this in the Polk forum
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post #3 of 17 Old 02-03-2014, 07:27 AM
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Are you finding they don't get loud enough for you? How far away do you sit? A stronger amp isn't going to make them sound better when driven at the same volume, and assuming that volume is within the capabilities of the 1613.

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post #4 of 17 Old 02-03-2014, 08:06 AM - Thread Starter
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I sit around 15-17 ft away. The sound is good and clear but I often have the receiver pushed almost max on movies or while listening to music. I'd like a little more power/volume. I called Polk a while back and told him my setup and he recommended a separate amp for the fronts.
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post #5 of 17 Old 02-03-2014, 08:19 AM
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That is pretty far away, I can see how you would be really pushing the 1613 if you listen at high volumes. Unfortunately, just adding an amp is not so easy. You need a receiver with pre-outs so that you can connect a discrete amp and let the receiver act as a processor for some or all of the channels. With Denon, you don't get these until way up the line, other brands offer pre-outs in some of their more modest receivers.

For you this means getting a new receiver, and a discrete amp, which is not going to be cheap. If you can still return the AVR-1613, then you could go with something that has pre-outs, and then save for an amp. I would look for a 3-channel amp to power your front sound stage, the receiver will do a fine job for just surrounds.

www.accessories4less.com is a good place to get refurbished receivers, and you can save yourself quite a bit of money. Just for reference, the Marantz SR5006 was the cheapest I saw with pre-outs for the main L and R, and the SR5007 is the cheapest with full pre-outs. Both are in the $500 range...
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post #6 of 17 Old 02-03-2014, 08:56 AM
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Do you own a subwoofer?

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post #7 of 17 Old 02-03-2014, 09:21 AM
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Quote:
Originally Posted by repickrel View Post

I sit around 15-17 ft away. The sound is good and clear but I often have the receiver pushed almost max on movies or while listening to music. I'd like a little more power/volume. I called Polk a while back and told him my setup and he recommended a separate amp for the fronts.

Yeah, Trans is right, you'd have to upgrade your AVR in order to accommodate an amp. And with you being on a budget, you'd need to start saving. The link Trans gave is a great one, refurbs is an awesome way to go, in most cases, you can't even tell the product isn't brand new.

You could consider Onkyo's, and extend your savings even greater.

I used to have the M70's, in a med to lg room, the extra power from an amp helps tons. I ran mine off an Emotiva XPA-3, a 3ch 200wpc amp so the center got some amp loving too.

I went to sell my M70's after an upgrade to the RTiA's, at that time, I had the XPA-2, a stereo amp with 300wpc, so the M70's got demoed on that amp, wow, when I cranked it for some music demos, I had second thoughts about selling them, that extra power really sounded good.

So, what am I running now????? A pair of XPA-2's in bridged mode (mono blocks), my A9's are getting 860w of pure loving biggrin.gif

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post #8 of 17 Old 02-03-2014, 12:11 PM
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IMO spending a lot of money for $275 speakers does not make a lot sense. To get more power= new receiver with pre outs, an amp with a lot of power. probably looking at $800 or more.


And remember to gain 3dB requires double the power, so if you have 125 watt amp, a 250 watt amp will only give you 3dB more volume in theory.
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post #9 of 17 Old 02-03-2014, 12:32 PM
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simple question, have you run an Audyssey calibration with your current amp/speakers?
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post #10 of 17 Old 02-03-2014, 12:35 PM
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Quote:
Originally Posted by olletsoc View Post

simple question, have you run an Audyssey calibration with your current amp/speakers?

Is that going to make a difference?
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post #11 of 17 Old 02-03-2014, 09:27 PM - Thread Starter
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I do own a subwoofer. It's a jbl es250pbk. Also I have done an audyssey calibration other than I prefer some of my own eq settings. Why can I not just run the front outputs on my receiver to an amp? Why does it have to be through a pre-out
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post #12 of 17 Old 02-03-2014, 09:54 PM
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Quote:
Originally Posted by repickrel View Post

Why can I not just run the front outputs on my receiver to an amp?

What front outputs? All you have is a headphone jack on the front of the receiver? confused.gif

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post #13 of 17 Old 02-03-2014, 09:56 PM - Thread Starter
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Sorry the outputs for the front L & R. Why can't I run those to an amp
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post #14 of 17 Old 02-03-2014, 09:58 PM
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Quote:
Originally Posted by repickrel View Post

I do own a subwoofer. It's a jbl es250pbk. Also I have done an audyssey calibration other than I prefer some of my own eq settings. Why can I not just run the front outputs on my receiver to an amp? Why does it have to be through a pre-out
you will have to find an amp with high level inputs
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post #15 of 17 Old 02-03-2014, 10:00 PM
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Quote:
Originally Posted by repickrel View Post

Sorry the outputs for the front L & R. Why can't I run those to an amp

Because the audio signal has already been amplified. You would fry some electronics doing that.

Sorry. But there's no cheap way to accomplish your goals. It's going to be pricey.

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post #16 of 17 Old 02-04-2014, 05:23 AM
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Quote:
Originally Posted by repickrel View Post

I do own a subwoofer. It's a jbl es250pbk. Also I have done an audyssey calibration other than I prefer some of my own eq settings. Why can I not just run the front outputs on my receiver to an amp? Why does it have to be through a pre-out

Make sure your speakers are all set to "small" and 80Hz is a good place to start with your crossover. Letting the sub handle all the bass means the receiver doesn't have to work as hard and you can get some extra headroom.

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post #17 of 17 Old 02-04-2014, 07:42 AM - Thread Starter
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Ok well thanks for the help everyone. Looks like I'll be stuck as is for a while. As mark62 said it wouldn't really be worth $800+ for my cheaper setup.
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Polk Audio Monitor 70 Am7025 B 3 Way Floorstanding Speaker Single Black , Denon Avr 1613 Receiver

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