AUDIOPHONICS MPA-S250NC Amp Review

[testp]

hey, i just got and hooked up audiophonics mpa-s250ncx mp, i opened it up as well, but even before, i noticed that if i attach the power cord, it is making a slight "switching noise" is the best i can think it is, even when hooked up in my system now, it is present. of course this is only at my ear being close to it, or at best like 35cm / 1 feet away, i can hear it. now i'm not complaining or anything just curious, do others hear it too with nc-series in quiet room?

EDIT: my previous class d was with a power supply hidden away somwhere, so didn't noticed this before

 

[Acerun]

hey, i just got and hooked up audiophonics mpa-s250ncx mp, i opened it up as well, but even before, i noticed that if i attach the power cord, it is making a slight "switching noise" is the best i can think it is, even when hooked up in my system now, it is present. of course this is only at my ear being close to it, or at best like 35cm / 1 feet away, i can hear it. now i'm not complaining or anything just curious, do others hear it too with nc-series in quiet room?

EDIT: my previous class d was with a power supply hidden away somwhere, so didn't noticed this before

Yes I had the same issue. Returned it and bought a different brand Purifi amp which has no issues/noise.

 

[testp]

Yes I had the same issue. Returned it and bought a different brand Purifi amp which has no issues/noise.

luckily this isn't an issue for me, but it's good to know, this is generic for these then.

 

[daftcombo]

Same here but if you cover the grills it shouldn't be audible.

 

[testp]

Same here but if you cover the grills it shouldn't be audible.

i do get some heat dissipation from there
another idea would be to add some deafening pads inside, at the bottom sides i guess (always make sure to empty the power reserves from caps before).

i did already add a pot for the front light, that thing was a flashlight.

 

[Nc26]

I ordered the AP300-S250NCX.

AUDIOPHONICS AP300-S250NCX Amplificateur de Puissance NcoreX NCx252MP

Le Audiophonics AP300-S250NCX est un amplificateur stéréo basé sur un module d'amplification Hypex NcoreX NCx252MP. Il est idéal pour disposer d'une réserve de puissance conséquente (2x250W @ 4Ω) sans sacrifier la qualité de restitution sonore.

www.audiophonics.fr

The form factor is a bit nicer, even though the one I tested is also good. It’s a real plus to have the XLR inputs as well.
It seems the NcoreX module performs slightly better, but is that actually audible?
In any case, it’s great to find this kind of price-to-performance ratio without too many compromises, apart from maybe the aesthetics.
For now, it's out of stock at Audiophonics. Just have to be patient—I can't wait!

It will be good to test à NCoreX base amplifier

 

[Nc26]

J'ai reçu le cousin du produit testé : Ap300-s250ncx.

Est-il normal d'entendre un souffle dans les tweeters? Cela s'entend à moins de 10cm.
J'ai débranché la source, le bruit est toujours là. Donc c'est interne à l'amplificateur.

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I received the cousin of the product I tested: the Ap300-s250ncx. Is it normal to hear a hiss in the tweeters? It's audible from less than 10cm away. I unplugged the source, but the noise is still there. So it's internal to the amplifier.

My speakers : Davis Acoustics Ariane 7.

 

[testp]

J'ai reçu le cousin du produit testé : Ap300-s250ncx.

Est-il normal d'entendre un souffle dans les tweeters? Cela s'entend à moins de 10cm.
J'ai débranché la source, le bruit est toujours là. Donc c'est interne à l'amplificateur.

mhmh i hear you, but don't understand you. google translate does help..

what speakers do you have, mine are lower sensibility but no hiss at all. mpa-s252ncx xlr