Olasonic NANO-COMPO power amplifier NANO-A1 Speaker output: stereo 56W + 56W (4) / 28W + 28W (8) (dynamic power) / bi-amp (mono) 56W + 56W (4) / 28W + 28W (8) (dynamic power) / mono 56W (4) / 28W (8) (dynamic power) / amplifier system: SCDS (Super Charged drive system) system / frequency response: 5Hz ~ 100,000Hz Dimensions: 149 (W)  33 (H)  149 (D) mm (not including protrusions) / 149 (W)  39 (H)  172 (D) mm / Weight: 1200g (amplifier body only) Power: AC100V ~ 240V (AC power adapter is used) / power consumption: standby: 0.5W, at the maximum output: 45W Accessories: AC power adapter, AC power cable (3P inlet type), RCA short pin (one), Japanese manual / cable length: AC power cable + AC power adapter about 2.4m Japanese manual URL (PDF):http://www.olasonic.jp/nanocompo/guide/nanoa1_manual.pdf