The PA amplifier is in good working condition. 2U Rackmpuntable unit. It has a nice tone with crisp highs. Used it to power my studio monitors to PA monitors. Properly Dusted and comes with original packaging materials. I do not know the official RMS Rating but what I know is at 8Ω its around 100-125 RMS. Double this for 4Ω. Specs from the mfg is probably for peak ms Watts. Specs are as follow from Mfg: *Output: 2 x Speakon, 2 x 1/4" *Input: 2 x RCA 2 x 1/4" *Input Impedance: ≥10 kΩ *Output Impedance: 4 to 8Ω, 4Ω with Speakon outputs *CoolingFan *Power Input115/230 V switchable *Power Output2 x 650 W at 4Ω *Total Harmonic Distortion From 20 to 20,000 Hz: <0.5% *Frequency Response From 20 to 20,000 Hz at <0.5 dBNoise>98 dBChannel *Isolation At 1,000 Hz: ≥82 dB *Input Level≥0 dB *Dimensions (W x D x H)19.0 x 12.0 x 3.5" (48.2 x 30.4 x 8.8 cm) *Weight18.0 lb (8.1 kg)