Audiophonics MPA-S250 NC

[campaz]

I'm thinking of purchasing an Audiophonics MPA-S250 NC amplifier to pair with my Wiim Ultra (the system also includes Indiana Line Diva 262 speakers). Has anyone tried this combination yet? Does anyone know how the triggering between the two works? Thanks

 

[huw]

NC252MP is pretty old now and as @F1 Fan says there have been some reliability issues. Probably better to look for an amp using the newly released NCx252MP (NCOREx version of the same module). I believe it's a drop-in replacement for the NC252MP so many assemblers should start shipping these soon.

AUDIOPHONICS AP300-S250NCX Power Amplifier NcoreX NCx252MP

The Audiophonics AP300-S250NCX is a stereo amplifier based on a Hypex NcoreX NCx252MP amplifier module. It is ideal for providing a significant power reserve (2x250W @ 4Ω) without sacrificing sound reproduction quality.

www.audiophonics.fr

 

[slartibartfast]

NC252MP is pretty old now and as @F1 Fan says there have been some reliability issues. Probably better to look for an amp using the newly released NCx252MP (NCOREx version of the same module). I believe it's a drop-in replacement for the NC252MP so many assemblers should start shipping these soon.

AUDIOPHONICS AP300-S250NCX Power Amplifier NcoreX NCx252MP

The Audiophonics AP300-S250NCX is a stereo amplifier based on a Hypex NcoreX NCx252MP amplifier module. It is ideal for providing a significant power reserve (2x250W @ 4Ω) without sacrificing sound reproduction quality.

www.audiophonics.fr

I wonder why the power output into 4 ohms isn't double the power into 8 ohms. They quote
250W / 4
150W / 8

 

[Aquaman]

I wonder why the power output into 4 ohms isn't double the power into 8 ohms. They quote
250W / 4
150W / 8

A PSU limitation?

 

[slartibartfast]

A PSU limitation?

It has a regulated SMPS though.

 

[Aquaman]

It has a regulated SMPS though.

Hmm, what‘s even more baffling is the power rating into 2 ohms. Only 180 watts! (A typo?)

I‘m lacking the technical background to evaluate this.
I have to revert to common sense. This tells me that the PSU, even though it may be of high quality, only has limited capacity and that the 2 ohms power is really 280 watts instead of the stated 180.

 

[slartibartfast]

Hmm, what‘s even more baffling is the power rating into 2 ohms. Only 180 watts! (A typo?)

I‘m lacking the technical background to evaluate this.
I have to revert to common sense. This tells me that the PSU, even though it may be of high quality, only has limited capacity and that the 2 ohms power is really 280 watts instead of the stated 180.

The power supply could be current limited but why do that for a state of the art amp. Maybe the current limit folds back

 

[Aquaman]

The power supply could be current limited but why do that for a state of the art amp. Maybe the current limit folds back

Or maybe a.limitation of heat on the NCore modules? Those thingys are really high-bread beasts pushed to the limits. This basically applies to all of the current ‚state of the art‘ D-class modules. So it‘s up to the designers to implement them with a bit of common sense.

 

[slartibartfast]

Or maybe a.limitation of heat on the NCore modules? Those thingys are really high-bread beasts pushed to the limits. This basically applies to all of the current ‚state of the art‘ D-class modules. So it‘s up to the designers to implement them with a bit of common sense.

I reckon that's it.

 

[huw]

The datasheet is available - see the notes for power into 2Ω and 8Ω. These are designed to be a compact all-in-one solution for active speakers and suchlike. The NCOREx 500 modules with external power supplies are the state-of-the art modules for those requiring much more power.

 

[slartibartfast]

The datasheet is available - see the notes for power into 2Ω and 8Ω. These are designed to be a compact all-in-one solution for active speakers and suchlike. The NCOREx 500 modules with external power supplies are the state-of-the art modules for those requiring much more power.

The continuous power is 50W at 25C ambient. Presumably that is for a 4 ohm load since it says typically 1/5th of the peak power so only 30W at 8 ohms. I don't suppose the WiiM Amps can sustain the rated power continuously either.

 

[huw]

This might be going off topic (or is it on topic for here ) but yes looks like nowadays TPA3255 based amps like the WiiM products are tough competition to the NCxXXXMP based amps. Need to go to Purifi or NCOREx (or Nilai - are these DIY only?) for state-of-the-art (better measuring but no audible difference) or masses of power for hard to drive loudspeakers at deafness inducing volumes...