Low residual noise class a- ab amplifier suggestions

[Chrise36]

As i am in search for a class a or ab amplifier with low residual noise to bi amp my speakers i would like some suggestions for amps that have residual noise under 50μV. Integrateds receivers poweramps everything is welcome. I have only found specs and measurements for yamaha as301 to 801 until now. Any other suggestions?

 

[dualazmak]

Hello,

I hope my multichannel multi-driver multi-way multi-amplifier stereo audio project and my rather intensive amplifier exploration journey would be some reference for you.

My recent decision on selection of amplifiers can be found in my post #311 on the thread.

Please find my latest system configuration in my post #416 on that thread.

 

[pjug]

A weighted? Soundstage gives this in their measurements. For example the Anthem P2 and PVA2 are below 50uV, A-weighted.

SoundStageNetwork.com | SoundStage.com - Amplifier Measurements

www.soundstagenetwork.com

 

[NTK]

50 μV is -95 dB down from 2.83 V. That is below 0 dBSPL at 1 m for most speakers. Do you really need that low residual electrical noise?

 

[Chrise36]

50 μV is -95 dB down from 2.83 V. That is below 0 dBSPL at 1 m for most speakers. Do you really need that low residual electrical noise?

I want to match my ncores as far as noise goes else i would be downgrading

 

[pma]

I want to match my ncores as far as noise goes else i would be downgrading

Remember you MUST count with output noise of the sound source, DAC or preamp. This will be multiplied by the gain of the power amplifier (your NCore) and there is no way how to avoid it, regardless power amplifier lowest noise. You need to know level diagram and noise of all the components in the audio chain, otherwise the considerations are pointless. In a real chain, it is the preamp or DAC that almost always determines the resulting noise.

 

[DVDdoug]

I want to match my ncores as far as noise goes else i would be downgrading

You're not downgrading the sound if you can't hear the noise. Would you consider it "downgrading" switching from an amplifier that goes to 100kHz to one that "only" goes to 30kHz?

I have only found specs and measurements for yamaha as301 to 801 until now. Any other suggestions?

You're more likely to find a S/N spec. You'd have to know the reference (signal) level and with some math (and maybe a spreadsheet) you could convert to volts.

 

[Chrise36]

You're not downgrading the sound if you can't hear the noise. Would you consider it "downgrading" switching from an amplifier that goes to 100kHz to one that "only" goes to 30kHz?

You're more likely to find a S/N spec. You'd have to know the reference (signal) level and with some math (and maybe a spreadsheet) you could convert to volts.

The s/n is often misleading i started to give more attention to residual noise that gives an immediate impression about how noisy the amp should be besides it is not practical to find what you describe for every amp i would be interested.

 

[Chrise36]

Remember you MUST count with output noise of the sound source, DAC or preamp. This will be multiplied by the gain of the power amplifier (your NCore) and there is no way how to avoid it, regardless power amplifier lowest noise. You need to know level diagram and noise of all the components in the audio chain, otherwise the considerations are pointless. In a real chain, it is the preamp or DAC that almost always determines the resulting noise.

For the time the dac (D50S) is driving the amp that is a quiet dac. What do you think of the Yamaha AS 301? It has good specs although the older AS700 seems to be much better amp.

 

[pjug]

If these will be tweeter amps, maybe neurochrome is a good option:

Modulus-286

DIY and OEM 125W composite amplifier based on the LM3886 providing better than -120 dBc THD through the use of error correction. The Modulus-286 has no sonic signature so you can hear the music and not the amplifier.

neurochrome.com

 

[groovybassist]

If you can DIY, Neurochrome is a great option. I run a Modulus-286 built by @tomchr as my DIY chops are nil.

 

[Chrise36]

If you can DIY, Neurochrome is a great option. I run a Modulus-286 built by @tomchr as my DIY chops are nil.

The 286 would be perfect but it would cost too much for a complete dual mono amp.