Audiophilepure

Rotel RB-1582 MkII Stereo Amplifier

Because the minimum load impedance specified for the RB-1582 MkII is 4Ω and the maximum power consumption is rated at 550W (it would need to be >1600W for full power into a 2Ω load), I didn’t test with lower impedances. Within its stated design parameters, the RB-1582 MkII’s results are excellent with a doubling of power into a halved impedance on a single channel. It would be interesting to see what this amplifier could do with a larger power transformer as its ten transistors per channel are clearly capable of delivering 400 watts per channel (800 watts total) into four ohms and probably even more into lower impedances.

I’ll also mention that the protection circuitry on the RB-1582 MkII kicked in momentarily during disconnecting and reconnecting the unbalanced cables and at one point during high-frequency, high-power testing. This gives peace of mind that the amplifier knows its limits and will intervene if it sees something wrong. The protection circuitry was never activated during normal listening.

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