Power amplifiers stereo — Rotel RMB-1587MKII

The RMB-1587MKII is a seven-channel power amplifier from Rotel, built with substantial per-channel output and a high damping factor. This model sits within Rotel's more serious multichannel amplifier catalogue, offering considerably more power per channel than the more accessible C8 while covering fewer total channels.

Key specs that matter

Input sensitivity is 3400 mV via XLR and 1610 mV via RCA. Input impedance is 50,000 ohms balanced and 12,000 ohms single-ended. Rated output is 7 times 155 W into 8 ohms, rising to 7 times 250 W into 4 ohms across all seven channels - a clean doubling suggesting a robust power supply. Gain is 26.6 dBu. Rated bandwidth is 10 Hz to 100 000 Hz. Signal-to-noise is 111 dB with distortion under 0.03%. Maximum power consumption is 1400 W. Damping factor is 330, considerably higher than the C8's 80. At 431 x 237 x 456 mm and 37.6 kg it is a substantial, heavy chassis.

Sound and use context

Expect a highly controlled, high-output presentation across all seven channels, with the considerably higher damping factor than the C8 suggesting tighter grip on loudspeaker cone motion for demanding surround content.

Pairing

Seven channels cover most conventional surround layouts including some object-based configurations, with the clean doubling into 4 ohms suiting demanding or less sensitive loudspeakers without derating concerns.

Alternatives

Rotel's more accessible C8 sits below this model with more channels but considerably lower per-channel output and damping factor, worth comparing directly if outright channel count matters more than per-channel power and control for a specific installation. Rotel extensive dealer network makes arranging a direct comparison against the more accessible C8 practical, helping clarify whether the considerably higher damping factor here translates into an audible improvement for demanding surround content. Given the substantial 37.6 kg weight, a solid, well-supported equipment shelf is essential before installation of this seven-channel amplifier. Overall this remains a capable, high-damping-factor choice for demanding multichannel installations. A dealer conversation about specific room and speaker layout also helps confirm this model suits the installation. A dealer visit remains the simplest way to confirm current pricing and availability for this model.