NuPrime Audio STA-9 Power Amplifier

£795.00

£662.50 Exc. VAT |

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Description
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NuPrime Audio STA-9 Power Amplifier

The NuPrime STA-9, a 2 X 120W Class A+D stereo amp, bridgeable into a 290W mono amp, is designed with enhanced even-order harmonic circuitry that mimics the most attractive features of tubed-amp sound without incurring tubes’ drawbacks and limitations. The STA-9’s spacious, transparent, dynamic and luxuriously textured soundstage has to be heard to believe.

The STA-9 amplifier is derived from the ULCAM (Ultra Linear Class A Module)+Class D design first introduced in the IDA-8. By joining a powerful high impedance singled ended amplifier circuit in the preamp stage with a well integrated Class-D power stage, the STA-9 delivers a rich tube-like sound with the remarkable speed and clarity of NuPrime Class-D design. Audio enthusiasts are bound to be impressed.

The NuPrime amp circuit improves on traditional Class-D design by using a self-oscillating circuit to generate pulse-width modulation. The amplifier switches at a frequency of 550kHz, well beyond the compact disc’s 44.1kHz sampling rate. Most class-D amps switch at 300kHz or lower. Completing the ensemble is NuPrime’s new linear power supply with its high-efficiency toroidal transformer for reduced high-frequency noise and strengthened low-frequency performance.

The damping effect of the NuPrime isolation feet (patent pending) absorbs and cancels vibrations that degrade audio performance. The overall result is unprecedented transient speed and an almost shocking level of dynamic impact.The STA-9’s frequency response to 50 kHz elevates vocals into emotional experiences; similarly, instrumental upper registers mimic a live performance’s shimmering heights.

Features:

Single End Class A + D amplifier design
Bridgeable allowing switch between stereo or mono mode.
Enhanced even-order harmonic (H2) circuitry resembling the most attractive features of tubed-amp sound without its drawbacks and limitations.
Highly reliable under no-load condition and enhanced short circuit protection.
High output current drive capability for low impedance speakers.
550 KHz switching frequency for accurate reproduction of musical signal.
New linear power supply with a high-efficiency toroidal transformer. Reduced high-frequency noise and strengthened low-frequency performance.
Signal path avoids cross-linking capacitors, thus achieving a frequency response at DC level for pure musical enjoyment.

Inputs:
- RCA: Un-Balanced input x 1
- XLR: Balanced input x 1
Outputs:
- Stereo Speaker Out x 1 or
- Mono Speaker Out x 1
Power: 2 X 120W / 1 X 290W @ 8 & 4 Ohms
Peak Output Power: 2 X 280W / 1 X 320W @ 8 & 4 Ohms
Input Impedance: 47k Ohms
Input sensitivity: 232.8mV, 1W @ 8 Ohms; 1.4V to rated power
Gain: x 22 (x 42 for mono)
Signal to Noise Ratio: < -95dB at 1W, 10W, 100W
Dynamic range: -115dB to 0dB at 1kHz
THD+N: 0.02% (Stereo) / 0.01% (Mono)
Frequency Response: 10Hz to 50kHz
Worldwide AC voltage: (115 VAC / 230 VAC) with Voltage Select Switch
AC Fuse: Slow-blow, 3A, 250VAC
Dimension: 235 mm W x 281 mm D x 55 mm H (including feet)
Weight: 4.75 kg
Color: Black or Silver
In a 110V outlet, the idle-power consumption is below 14W. In a 230V outlet, the idle-power consumption is below 16W.

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