Description RMB-1555 With only slightly less power than its big brother, the RMB-1555 retains a very robust power supply to deliver 5 x 120 Watts per channel to medium and large home theaters. The RMB-1555 is a remarkable multichannel amplifier with power output conservatively rated at 120 Watts per channel into 8 ohms (all channels driven!). With all but the most demanding speakers located in extraordinarily large rooms, the RMB-1555 exerts the kind of precise control that presents both nuance and bombast correctly from the faintest flute overtones to the subterranean rumble of an approaching apocalypse. The RMB-1555 employs a high current, toroidal transformer matched to discrete output transistors with their higher thermal stability and freedom from the designed-in compromises that characterize their integrated circuit cousins. The Class AB amplifier configuration assures the best balance between power output and thermal efficiency. Dimensions (W × H × D) 431 × 188 × 454mm 17″ × 7.5″ × 17.9″ Front Panel Height 4U / 176.8mm (7″) Power Requirements 120V, 60Hz Power Consumption 650W Standby Power Consumption 0.5W Net Weight 21.8kg (48lbs.) BTU Rating (4Ω, 1/8th power) 1683 BTU/h Power Output 120W/Ch (5 channels driven, 8Ω) 170W/Ch (5 channels driven, 4Ω) Total Harmonic Distortion (THD) (20Hz–20kHz) <0.03% Frequency Response 10Hz – 100kHz 0.5, -3dB S/N Ratio (IHF “A” Weighted) 116dB Gain 26.5dB Intermodulation Distortion (60Hz:7kHz, 4:1) <0.03% Damping Factor 180 Speaker Impedance 4Ω minimum Input Sensitivity 1.5V Input Impedance 12kΩ
