Lovely set of class D amplifiers from the young brand NuForce. Very well respected top line. These monoblocks are accurate, detailed but still natural sounding. All parts are original and as far as I know where never repaired or whatsoever. Will be send in their original packaging. This sale contains 2x NuForce Reference 9 monoblocks, and 1x NuForce P8 preamplifier in silver colour. Will be send in original boxes with EUR cables. This set is suiteble for 100v/240v so can be used worldwide. Reference 9 SPECS: RMS output power: 160 Watt RMS @ 8 Ohm, 300 W @ 4 Ohm, 350 W @ 2 Ohm Peak output power (20 ms bursts): 338 Watt @ 8 Ohm, 676 W @ 4 ohm, 1352 W @ 2 Ohm Gain: +26 dB Input impedance: 47 kOhm Output impedance: nearly zero from 20 to 20 kHz THD + N: 0,05 % (20-20 kHz kHz, 10 Watt @ 8 Ohm) Frequency response: 100 - 20,000 Hz ± 0.3 dB, 20 Hz @ -0.9 dB, 80 kHz @ -3dB Damping factor: > 4000 on any load Signal to noise ratio: 120 dB @ 100 watt Size (W x H x D): 435 x 160 x 350 mm Weight: 4 kgs each