Nu Prime STA 9

Class A+D Stereo Amp bridgeable into a 290W mono amp

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.

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.

The NuPrime Sound

• Vast soundstage
• Wide, lightning-fast dynamics
• Ultra-low distortion and noise
• Music emerges from a pristine background, with delicate details and nuances intact

In summary, NuPrime’s sonic character stands well apart from – and indeed above – the soft, cushy sound we often associate with most tubed amplification or the dry, clinically edgy sound we often associate with solid-state and switching technology. Rarely does an amp achieve an ideal balance of richly textured timbres and harmonics, bottom-end authority, startling dynamics, exquisite low-level detail, and a fully revealed, fully dimensional soundstage against a backdrop of mile-deep silence.

Specifications:

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
• Gain: x 22
• Signal to Noise Ratio: < -95dB at 1W, 10W, 100W
• 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