Recommendation for an AVR that can handle 4ohm 3.1 setup - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 10 Old 07-16-2019, 06:17 PM - Thread Starter
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Recommendation for an AVR that can handle 4ohm 3.1 setup

Here is my setup:
L&R Martin Logan Motion 4i 4ohm speakers
Center channel: Sony A9G Tv. (Has center channel input and acoustic surface can be used as the center)
Sub Definitive Technologies supercube 2000.

I need a recommendation for a new receiver, since my Sony dn1080 won’t handle 4ohm speakers. eARC support is a must. I need a receiver that will get me the most out of this setup. Any suggestions?
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post #2 of 10 Old 07-16-2019, 08:42 PM
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@sd13 you have a lot of good options from new to refurbished.

Budget?
You expanding past 3.1?
You don't need atmos but do you want uhd, 4k passthrough?
this for HT or music?
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post #3 of 10 Old 07-16-2019, 08:46 PM - Thread Starter
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Quote:
Originally Posted by eriksells916 View Post
@sd13 you have a lot of good options from new to refurbished.



Budget?

You expanding past 3.1?

You don't need atmos but do you want uhd, 4k passthrough?

this for HT or music?


It’s for both HT and music. I’m sticking to 3.1. Budget hoping to be under $1000 and 4K Pass-Through and earc is a must have.
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post #4 of 10 Old 07-16-2019, 10:00 PM
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DENON AVR-X3500H From an authorized dealer



Use code PRIME to save 20%


I just got it. Supports eARC with a firmware update.
4k passthrough
Audyssey MultiEQ XT32


Otherwise Marantz SR6013 can be had for around your budget and has better DACs for music. 9.2 built in channels with 11.2 processing


Marantz SR6013 from crutchfield


The marantz would have been my top pick if it was slightly cheaper.
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post #5 of 10 Old 07-17-2019, 11:10 AM - Thread Starter
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Quote:
Originally Posted by sherman9800 View Post
DENON AVR-X3500H From an authorized dealer



Use code PRIME to save 20%


I just got it. Supports eARC with a firmware update.
4k passthrough
Audyssey MultiEQ XT32


Otherwise Marantz SR6013 can be had for around your budget and has better DACs for music. 9.2 built in channels with 11.2 processing


Marantz SR6013 from crutchfield


The marantz would have been my top pick if it was slightly cheaper.


Do i need the extra power that the marantz offers for my 3.1 setup?
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post #6 of 10 Old 07-18-2019, 10:52 PM
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Do i need the extra power that the marantz offers for my 3.1 setup?

You would not notice a small approximate 20 watt difference in power. The power gets lower every time you add more speakers to your receiver. And you only need 32 watts to reach reference 105 db peaks on your speakers.


Your listed speakers are 90db sensitivity @ approximately 1 watt. Which is good efficiency.


They are a little small to really go crazy with and you would need much more power than even 125 watts in order to drive them to obscene levels, which would probably result in them actually breaking up and causing distortion because the speakers are not that large.
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post #7 of 10 Old 07-18-2019, 11:16 PM - Thread Starter
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Quote:
Originally Posted by sherman9800 View Post
You would not notice a small approximate 20 watt difference in power. The power gets lower every time you add more speakers to your receiver. And you only need 32 watts to reach reference 105 db peaks on your speakers.


Your listed speakers are 90db sensitivity @ approximately 1 watt. Which is good efficiency.


They are a little small to really go crazy with and you would need much more power than even 125 watts in order to drive them to obscene levels, which would probably result in them actually breaking up and causing distortion because the speakers are not that large.


That was very informative. Thanks! If you were in my shoes, and need something with earc and can handle 4ohm speakers, which receivers would be on your list? Not concerned right now about future proofing.
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post #8 of 10 Old 07-20-2019, 04:03 PM
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Talking

@sd13 most receivers will play 4ohm speakers fine. However, if you crank it, play for extended periods of time or like to play movies at reference levels, then you will need something with some nuts!

If you are not worried about future proof then most of the top of line models from a few years ago will have plenty of power. The Denon x5200, Yammy a3050, Onkyo rz920/rz1100 or Pioneer sc-lx701 are on sale refurbished.

Otherwise here are some newer models, kinda in order from good to bad assness

Pioneer vsx-lx503
Onkyo rz730/rz830
Yamaha rx-a2070/rx-v2085
Denon x4400/x4500
Marantz sr6012/6013/7012/7013
NAD
Anthem
Arcam
Mcintosh
Lexicon
Storm Audio
Monolith
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Last edited by eriksells916; 07-20-2019 at 04:09 PM.
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post #9 of 10 Old 07-20-2019, 07:12 PM - Thread Starter
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I’ve narrowed it down to Denon x3500h, Marantz sr6013, and Denon x4500h. Can you tell me if with my current speaker setup will i notice significant differences between the three? Will all 3 work much better than my current Sony dn1080 which doesn’t have 4ohm support?
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post #10 of 10 Old 07-20-2019, 07:25 PM
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Quote:
Originally Posted by sherman9800 View Post
You would not notice a small approximate 20 watt difference in power. The power gets lower every time you add more speakers to your receiver. And you only need 32 watts to reach reference 105 db peaks on your speakers.


Your listed speakers are 90db sensitivity @ approximately 1 watt. Which is good efficiency.


They are a little small to really go crazy with and you would need much more power than even 125 watts in order to drive them to obscene levels, which would probably result in them actually breaking up and causing distortion because the speakers are not that large.
The 4i is listed at 90dB at 2.83V RMS. For 4 ohm speakers, that would be 87 dB/W, which is still good.

Ignoring any room gain, you'd need 63W to get 105 dB at a 1m listening distance, rather than 32W. (105 dB peak is the THX recommendation for home theater. It's really loud; 85 dB continuous, another spec, is supposed to cause hearing damage with prolonged exposure.) At 3m (10 feet), you'd need 568W for 105 dB! The max power suggested for the 4i is 150W. If you really want loud, medium to small bookshelf speakers may not be the best solution.

This is naïve arithmetic, I admit.

If I a) owned 4 ohm speakers and b) tended to worry, I might consider an AVR with Class D amplifiers, like the Pioneer SC-LX models. The VSX-LX503 is not class D, unlike the older SC-LX501. Unfortunately, the surviving class D models tend to be expensive.
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Last edited by bobknavs; 07-20-2019 at 07:29 PM.
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