Power amplifiers stereo — Rotel RMB-1506

The RMB-1506 is a stereo power amplifier from Rotel, sharing the RMB-1504's electrical foundation within a two-channel format with somewhat greater per-channel power. The RMB-1506 brings Rotel's considered engineering to dedicated stereo power amplification.

Key specs that matter

Input sensitivity is 1,000mV, matching the RMB-1504. Input impedance is 20,000 ohms single-ended, also matching. Output power is 50W into 8 ohms, rising to 80W into 4 ohms. Gain is 26dBu. Frequency response spans a wide 10Hz to 100,000Hz within plus-or-minus 3dB, matching the RMB-1504. Signal-to-noise ratio is a strong 115dB, also matching, with total harmonic distortion plus noise under 0.03% at 100% global feedback. Maximum power consumption is 450W, with damping factor exceeding an exceptional 200. At 431 x 144 x 424mm and 15.3kg, the RMB-1506 shares a similar chassis footprint to the RMB-1504 with slightly greater mass.

Sound and use context

Expect capable, well-controlled amplification reflecting the exceptional over-200 damping factor combined with the strong 115dB signal-to-noise figure, consistent with Rotel's broader accomplished engineering philosophy.

Pairing

The exceptional over-200 damping factor suits demanding loudspeaker loads with excellent bass control.

Alternatives

Rotel's own RMB-1504 offers a related four-channel alternative within the same broader RMB power amplifier catalogue for buyers needing multichannel capability instead.