AUDIOPHONICS MPA-S250NC XLR Amplificateur Stéréo Class D Ncore 2x250W 4 Ohm

Module d'amplification Hypex Ncore NC252MP

Le circuit d'amplification utilise un module Hypex Ncore NC252MP. Il s'agît d'un amplificateur Class D hautes performances polyvalent. Il offre une puissance très confortable de 2x150W sous 8Ω tout en profitant du haut rendement des amplificateurs en Class D.

Ses principales caractéristiques sont sa réponse en fréquence plate quelle que soit l'impédance de charge, son niveau de distorsion presque indépendant de la fréquence et sa capacité à rejeter les interférences EMI. Son fonctionnement est basé sur une boucle auto-oscillante contrôlée par décalage de phase et prenant en compte le feedback uniquement au niveau de la sortie enceintes.

Alimentation SMPS

Le module NC252MP intègre également l'étage d'amplification. Celui-ci est constitué d'une alimentation à découpage (SMPS) demi pont régulée avec redressement synchrone sur les rails de sortie principaux. Compact, puissante et efficace, cette alimentation est particulièrement adaptée pour alimenter proprement un amplificateur Class D.

De plus, pour offrir une compatibilité complète avec les tensions délivrées par les différents réseaux électriques, l'alimentation est équipée d'un doubleur de tension d'entrée automatique. Le module NC252MP dispose également d'un système de protection contre les surcharges.

Connectique

L'amplificateur MPA-S250NC possède une entrée XLR 3 pôles stéréo sur embases Neutrik NC3FAV2. La sortie de l'amplificateur se fait elle sur des borniers enceintes Elecaudio BP-209 plaqués Or 24k. Ces derniers acceptent également les fiches bananes ou les fourches pour des branchements rapides et faciles. Un connecteur trigger 5-12V au format Jack 3.5mm permet de contrôler l'allumage automatique de l'amplificateur quand intégré dans un système compatible. Enfin, un bouton bistable permet de passer l'appareil sous tension.

Spécifications
Type de produit	Amplificateur
Class	D
Nombre de canaux	Stéréo (2)
Puissance max. (@ 1kHz, THD=1%)	2x150W @ 8Ω 2x250W @ 4Ω 2x180W @ 2Ω
Entrée	1x XLR Stéréo Symétrique
Sortie	Borniers enceintes
Trigger	5-12V
THD+N	0.0015%
SNR	121dB
Bruit de sortie	30µV
Imépdance de sortie	1.5mΩ
Réponse en fréquence	10Hz - 50kHz
Rendement	92%

Spécifications

Type de produit

Amplificateur

Class

Nombre de canaux

Stéréo (2)

Puissance max. (@ 1kHz, THD=1%)

2x150W @ 8Ω
2x250W @ 4Ω
2x180W @ 2Ω

Entrée

1x XLR Stéréo Symétrique

Sortie

Borniers enceintes

Trigger

5-12V

THD+N

0.0015%

SNR

121dB

Bruit de sortie

30µV

Imépdance de sortie

1.5mΩ

Réponse en fréquence

10Hz - 50kHz

Rendement

92%

Général
Alimentation	230V / 110V (switch automatique)
Matériau boîtier	Aluminium brossé
Dimensions	141 x 357 x 65mm
Poids	1860g
Couleur	Noir
Package	1x Audiophonics MPA-S250NC XLR 1x Câble d'alimentation 1.8m

Général

Alimentation

230V / 110V (switch automatique)

Matériau boîtier

Aluminium brossé

Dimensions

141 x 357 x 65mm

Poids

1860g

Couleur

Noir

Package

1x Audiophonics MPA-S250NC XLR
1x Câble d'alimentation 1.8m

Entrées	XLR
Sorties	Borniers enceintes
Couleur	Noir
Canaux	2 (Stéréo)
Class	Class D / T
Composant amplification	Hypex Ncore
Puissance max (W)	150.0

Clean, uncolored power
I'm amazed that this relatively small amplifier can output such an amount of power without breaking a sweat, it doesn't even get hot to the touch! Class D is the way forward for amplifiers, no doubt. Completely transparent sound, no distortion or coloration.

A few small nitpicks: the feet of the amp slide around quite a bit, they are not rubber-coated. The rear panel is quite cramped, making it difficult to swap cables. This is a side effect of the small size of the amp, so it's understandable.

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Cet avis a été posté pour AUDIOPHONICS MPA-S250NC XLR Amplificateur Stéréo Class D Ncore 2x250W 4 Ohm

Very good stereo amp
I am using this ncore stereo amp MPA-250nc in my bedroom together with audiolab 8200cdq and the combo is terrific. Sound is very punchy and dynamic. No harshness and you can turn up the volume to high levels and the sound stays good. I am using it with monitor audio gx50 loudspeakers.
I have had many amps (plinius, emotiva, denon) and this ncore amp is very good in comparison. I am thinking to replace my emotiva xpr-5 with purifi based amps in the future for the living room as well. Highly recommended.

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Cet avis a été posté pour AUDIOPHONICS MPA-S250NC XLR Amplificateur Stéréo Class D Ncore 2x250W 4 Ohm

upgrading to 5-star
I bought one of these for my stereo rig. It performs beautifully and reliably.
I like it so much that I've ordered 2 more to update my 4.1 surround system to an efficient, powerful class D setup.
Other class D modules from Hypex and Purifi might measure better but I doubt that I could hear the difference.

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Cet avis a été posté pour AUDIOPHONICS MPA-S250NC XLR Amplificateur Stéréo Class D Ncore 2x250W 4 Ohm

Superb sound and value
I came from an ICE-power amp that was very similar in size (-10W). It cost more, but was older, too. That said, this little guy performs beautifully, it is the most honest amp I have ever had. An even earlier amp that I have enjoyed is the Parasound A23. Neither of the aforementioned amps comes close to what the little Ncore delivers. The channel separation makes me wish I could afford dual mono, but this one is great at it. The whole soundstage opened up a bit more and I thought that was one of the good aspects of my ICE power amp. Instrument separation improved, too. It seems as there is a bit more air around each one. That they are more localized across the stage.

As I listen in a near field setup, I don't have the depth I would like in my room, but again it delivers every bit that is there, almost to the point where there is the illusion that it goes a bit deeper than the wall. The biggest increases are twofold. For only 10 more watts than the ICE power the dynamics are far better than I have ever had... even with the Parasound that has almost twice the power. The biggest change, most dramatic, was what I call the honesty of the sound. It comes closer than any amp I have ever owned for its honest, natural sound. That also means that some work that I used to enjoy I avoid now- too unpleasant. The amount of honest, natural, unvarnished sound it delivers I find uncanny, for me a first. For the first time I have an amp that is neither warm or cold, it is delivering the music in a better, more honest manner than I am accustomed to hearing. All with an energy that amazes me given that it really doesn't have a lot of horsepower.

If there is a negative, it is as a review stated, the rounding of the leading edge of the notes. I take this to be a conscious decision by the designer, but that is just my guess. The problem, if it is not done exactly right, is that it can really annoy a guy like me immediately... if not sooner. Edgy, brittle I have no interest in, so while they are not there, even though the DAC I have does that little aspect superbly, it is not a deal breaker. The music still has a natural energy, life to itself that I find a breath of fresh air.

There is one real negative though and it has nothing to do with the sound, but rather the esthetics of the circle of light on the switch. Too raw, bright and thick... no finesse visually for a little amp that exudes finesse with its sound... oh well, can't have it all at this point... so I will settle for what counts- most of the great stuff and a very fair price.

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Cet avis a été posté pour AUDIOPHONICS MPA-S250NC XLR Amplificateur Stéréo Class D Ncore 2x250W 4 Ohm