The following information obtained from  YBA 2 HC power amplifier Specifications | Stereophile.com Dual-mono solid-state power amplifier. Maximumpower output: 70W into 8 ohms (18.5dBW), 140W into 4 ohms (18.5dBW). Frequencyresponse: 5Hz-80kHz, -3dB. Input sensitivity: 120mV RMS for 1W/8 ohms, 1.1V RMSfor rated output. Input impedance: 27k ohms. Output impedance: 0.02 ohms(damping factor quoted as 400 at 100Hz). Risetime: 3µs at 10kHz. S/N Ratio:100dB (reference and conditions not stated). Power consumption: 100VA idling,1000VA at full power.Dimensions: 16.9" (430mm) W by 13" (330mm) D by3.75" (95mm) H. Weight: 26.4 lbs (12kg).Serial number of sample reviewed: A2708HCS.Price: $3750. Approximate number of dealers: 8.Manufacturer: Phlox Electronique, BP 12, F-91440 Bures-sur-Yvette,France. Tel: (33) 1-6. Fax: (33) 1-6. Web: Recently cleaned and tested.