AV receiver and amp selection

raraavis

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Oct 27, 2014
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Hello,
Please help a newbie to build a combined hifi system for home theater (5.0) and stereo music (2.0).
I have the following speakers:
- Front Morel Sopran, 4 ohm, sensitivity 91.5dB, nominal power 250W.
- Rear Dali Rubicon LCR, 4 ohm, sensitivity 89dB.
- Center - don't have it yet, looking at Dali EPICON Vocal / KEF Q/R or similar.
The speakers will be place in medium size room around 25 m2, and the main purpose is listening to instrumental / vocal music in low volume.

There are several inputs, all should pass through AV processor / receiver.
Can see two conceptual setups:
1) Use A/V receiver with strong built-in amp. The main concern is whether a top model as Marantz SR7009 with 100-150W RMS per channel will be sufficient to drive such front speakers? The only criteria is quality in low/med volumes, not power.

2) Put a separate A/V receiver/processor, and amp(-s).
a. Take an amp with 5 channels, then the problem is that the channel require very different power...
b. Take 2 amps - one good with 2 channels for the front, and another smaller with 3 channels for rear and center. That's logical, but requires an additional box.
c. Put a good amp for the front, while the rear and center will be connected to the built-in internal amp in the AV receiver. That's a preferred option, but not sure it's possible and it's a common practice...

Requirements for the AV receiver/processor: audiophile-grade, "deep and warm" sound, support for 4K and 3D video, AirPlay, min 5-6 HDMI and 2 optical inputs, premium quality DAC (with jitter suppression).

If putting amps - please explain whether it should be integrated (then need synced sound control, such as unity gain) or power amp?

Which configuration and components would you recommend?

Thanks!
 
4ohm speakers do require a strong high current amp. There are many multichannel power amps that will drive 4 ohm speakers even with all channels driven.

This is one example (just something that came to mind first)

Product Lines > Halo > A 51 Five Channel Power Amplifier

There's also stuff like Bryston which might be a better price match for your speakers.

To be honest, I am only focusing on impedance matching and adequate power delivery.. Not on true speaker/amp matching. I personally believe that power matchup is of primary importance but that is only an opinion.
 
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