Liefert die STA-SE an 4 und 8 Ohm wirklich die gleiche Leistung?

Ja. Das GaN-Netzteil arbeitet so kontrolliert, dass die Endstufe an 8 wie an 4 Ohm 2 x 400 Watt RMS stabil abgibt. Wo viele Verstärker an niedriger Impedanz einbrechen, behält die STA-SE die Kontrolle – ideal für stromhungrige oder kapazitive Lautsprecher.

Was bringt Gallium-Nitrid (GaN) gegenüber klassischem Silizium?

GaN-Halbleiter schalten deutlich schneller und effizienter. Das erlaubt ein sehr leistungsstarkes Netzteil auf kleinem Raum, das weniger Hitze entwickelt und blitzschnell auf Dynamiksprünge der Musik reagiert. Das Resultat ist ein ruhiger, schwarzer Hintergrund.

Ist die STA-SE eine Class-D-Endstufe – klingt das nicht hart?

Sie ist Class-D, aber eine besondere. Durch die ODC-Fehlerkorrektur und die hohe Taktung von 650 Kilohertz vermeidet sie die typische digitale Härte und klingt natürlich und fein, eher in Richtung einer guten Class-A-Schaltung als nach Schaltverstärker.

Passt die STA-SE zu meinen Lautsprechern?

In den allermeisten Fällen ja – gerade leistungshungrige oder elektrisch heikle Boxen profitieren. Welche Vor- und Endstufen-Kombination zu deinem Raum und deinen Lautsprechern passt, klären wir bei HD Zürisee in Wädenswil gern persönlich mit dir.

Warum die NuPrime Evolution STA-SE bei HD Zürisee kaufen?

Wir sind eingespieltes Fachgeschäft am Zürichsee und wissen, an welchen Lautsprechern so eine Endstufe glänzt und an welchen nicht. Dazu eigener Techniker für Anlieferung und Einmessung, ehrliche Beratung zur passenden Vorstufe und korrekte Garantieabwicklung. Ruf an oder schreib uns.

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NuPrime Evolution STA-SE Stereo Power Amplifier, Black

CHF 5'499.00

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The NuPrime Evolution STA-SE is a stereo power amplifier that combines two independent mono amplifiers with a GaN power supply in one slim housing.

It's aimed at anyone who wants to combine the power of a power plant with the sensitivity of a good tube – without having to haul hundredweight transformer beasts into the rack.

Why the Evolution STA-SE?

The heart of it is the ANC GaN power supply. Think of it as high-end noise cancelling for your mains power: the power supply actively monitors the line and cancels interference in real time. That purity used to be achievable only with huge, ruinously expensive toroidal transformers. On top comes ODC technology, which corrects errors right at the components and pushes distortion down to 0.002 percent.

What you hear

Thanks to the consistent dual-mono design, instruments stand razor-sharp on a wide, deep stage. The high switching frequency of 650 kilohertz lays bare every detail of your sources – in the workshop we like to call it "Liquid Precision": it flows like liquid gold and still lands with the force of a hammer blow when the music calls for it. Furutech RCA inputs and Eichmann speaker terminals ensure clean connections; with top-tier cables the amplifier rewards you audibly.

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Who is the Evolution STA-SE for – and who isn't it for?

It's a true endgame device: even critical electrostatic or magnetostatic speakers with a high appetite for current (up to 40 amps peak) it drives with ease. Straight talk: if you're after the typically "mushy" or artificially sweetened sound of old classics, the STA-SE is almost too honest for you. It doesn't colour, it shows – a precision tool that gives you a truthful snapshot of your recordings.

Our verdict

One of the most interesting power amplifiers in its class: compact, cool, quiet, and yet brutally composed. If you want the melt of a tube but don't want to give up the authority and bass control of a 400-watt power plant, this is for you. Especially at night, the low noise floor pays off – details emerge out of nowhere.

Technical data

Type: stereo power amplifier, dual-mono, Class-D hybrid with ODC
Output power (RMS): 2 x 400 watts into 8 and 4 ohms
Power supply: ANC GaN with active noise cancellation
Switching frequency: 650 kilohertz
Distortion (THD+N): 0.002 percent at 5 watts
Frequency response: 10 hertz to 50,000 hertz (-3 dB)
Signal-to-noise ratio (S/N): 110 decibels at 100 watts
Input impedance: 47 kilohms
Peak current: up to 40 amps
Filter capacitance: 52,000 µF total
Connections: Furutech FP900 RCA, balanced XLR, Eichmann binding posts
Dimensions (W x H x D): 430 × 57 × 375 mm
Weight: 10.5 kg
Finishes: black or silver
Included: power amplifier, power cord, trigger cable, user manual

Frequently asked questions

Does the STA-SE really deliver the same power at 4 and 8 ohms?
Yes. The GaN power supply works so tightly controlled that the amplifier delivers 2 x 400 watts RMS stably into both 8 and 4 ohms. Where many amplifiers sag at low impedance, the STA-SE keeps control – ideal for current-hungry or capacitive speakers.

What does gallium nitride (GaN) offer over classic silicon?
GaN semiconductors switch significantly faster and more efficiently. This allows a very powerful power supply in a small space that generates less heat and reacts lightning-fast to dynamic jumps in the music. The result is a quiet, black background.

Is the STA-SE a Class-D power amplifier – doesn't that sound harsh?
It is Class D, but a special one. Thanks to ODC error correction and the high 650-kilohertz switching frequency, it avoids the typical digital harshness and sounds natural and refined, closer to a good Class-A circuit than a switching amplifier.

Does the STA-SE suit my speakers?
In the vast majority of cases, yes – especially power-hungry or electrically tricky speakers benefit. We're happy to work out in person at HD Zürisee in Wädenswil which preamp and power amp combination suits your room and your speakers.

Why buy the NuPrime Evolution STA-SE at HD Zürisee?
We're an established specialist shop on Lake Zurich and know which speakers a power amplifier like this shines with – and which it doesn't. Plus our own technician for delivery and set-up, honest advice on the right preamp, and proper warranty handling. Call or write to us.

Goes well with

A power amplifier needs an equally capable preamp and matching speakers. Browse the preamplifiers, the speakers, and the right cabling. We'll tell you honestly which combination suits your room.