$ 1229.00
$ 1.00
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 believed.
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.
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.
| 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 |
| Inputs: | 1 x Unbalanced RCA & 1 x Balanced XLR |
| Outputs: | Stereo Speaker Out x 1 or Mono Speaker Out x 1 |
| Gain: | x 22 |
| Signal to Noise Ratio: | < -80dB 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 |
| Dimensions: | 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.
When listening to the STA 9s, a silent background and grip/control over the music hits you first. Music is detailed, smooth and non-fatiguing, it makes you want to turn up the volume and listen for hours. My speakers are rated at 86db and 4 ohms, the STA 9s drives them with authority and ease. Highly recommended!
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