Rotel RB-1582MKII Stereo Power Amplifier

The Rotel RB-1582MKII Stereo Power Amplifier delivers 200 watts per channel into 8 ohms and 323 watts per channel into 4 ohms from a high-current Class AB design. Built around an oversized toroidal transformer, 60,000µF of British-made slit-foil power-supply capacitance, discrete high-current output stages, balanced XLR inputs, and a dual-mono circuit layout, it is engineered to drive substantial high-performance loudspeakers with control and dynamic headroom. Rotel

With a damping factor of 800, 116 dB signal-to-noise ratio, and frequency response extending to 100 kHz, the RB-1582MKII is a purpose-built power amplifier for serious two-channel systems as well as high-output front-channel amplification in a premium home theater.

200-Watt Class AB Amplification

The RB-1582MKII is rated at 200 watts per channel into 8 ohms, both channels driven from 20 Hz–20 kHz at less than 0.03% THD. Rotel's current product page additionally specifies 323 watts per channel into 4 ohms. Rotel

That combination of output power and current capability makes the RB-1582MKII well suited to larger floorstanding speakers and systems that benefit from significantly more amplifier headroom than a typical integrated amplifier can provide.

Oversized Toroidal Power Supply

At the center of the RB-1582MKII is an extremely large toroidal transformer feeding a substantial linear power supply. Rotel pairs it with 60,000µF of total storage capacitance, giving the output stage a significant reserve for musical transients and sustained low-frequency demands. Rotel

The transformer and power-supply architecture are fundamental to the amplifier's ability to maintain stable output as musical dynamics and loudspeaker demands increase.

British-Made Slit-Foil Capacitors

Rotel specifies high-performance British-made slit-foil capacitors in the RB-1582MKII's power supply. Their low-loss construction and rapid charge/discharge characteristics are intended to maintain current delivery during sudden dynamic peaks. Rotel

Rather than relying on output wattage alone, the RB-1582MKII uses a substantial energy-storage reserve to support its discrete Class AB output stage.

Dual-Mono Circuit Architecture

After the shared toroidal transformer, the left and right channels are laid out in a monoblock configuration. Rotel also terminates the amplifier's grounding in a star pattern on a copper grounding plate to minimize noise and interaction between circuits. Rotel

Each channel uses a fully discrete output stage with 10 high-current bipolar transistors, providing the current capacity required for demanding speaker loads. Rotel

800 Damping Factor

One of the RB-1582MKII's more impressive specifications is its 800 damping factor from 20 Hz–20 kHz into 8 ohms. Rotel

High damping factor gives the amplifier strong electrical control over connected loudspeaker drivers, an important consideration when pairing high-powered amplification with large woofers and complex multi-driver floorstanding speakers.

Balanced XLR & RCA Inputs

The RB-1582MKII provides both balanced XLR and unbalanced RCA inputs, allowing straightforward pairing with a wide range of stereo preamplifiers, DAC/preamplifiers, AV processors, and source components with variable analog outputs. Rotel

Input sensitivity is 1.9V through RCA and 3.0V through XLR, with corresponding input impedances of 12kΩ and 100kΩ. Gain is 26.5 dB RCA and 22.5 dB XLR. Rotel

Two-Channel HiFi or Home Theater

Although designed as a high-performance stereo amplifier, the RB-1582MKII can also provide dedicated amplification for the left and right front channels of a premium home theater system.

A 12V trigger input simplifies power control when the amplifier is connected to a compatible preamplifier, surround processor, or automation system. Rack ears are also included for professionally integrated installations. Rotel

Technical Details

Rotel's current web page adds the 323W/ch into 4Ω figure, while the manufacturer's downloadable specification sheet formally rates continuous output at 200W/ch into 8Ω, 20 Hz–20 kHz, <0.03% THD. Both figures are useful on the listing because they show the amplifier's output into different loads. Rotel

Rotel RB-1582MKII at The Grid HiFi

The Rotel RB-1582MKII is an excellent step into high-powered separates for systems that need more current and loudspeaker control than a conventional integrated amplifier can provide. Its 200W/ch Class AB output, 323W/ch 4-ohm capability, 800 damping factor, balanced XLR inputs, 60,000µF power supply, and discrete dual-mono architecture make it a strong foundation for a serious stereo system.

Pair it with the Rotel RC-1572MKII or RC-1590MKII for a complete Rotel separates system, or integrate it with another premium preamplifier, DAC/preamp, or AV processor.

The Grid HiFi offers Rotel components to customers throughout the United States, with expert support for matching the RB-1582MKII to preamplifiers, loudspeakers, source components, cabling, and complete two-channel or home theater systems. Customers who want to experience Rotel in person can also arrange a demonstration at our Houston showroom.

Ready to give your speakers more power and control? Call The Grid HiFi at (713) 218-8120 for expert RB-1582MKII system matching and support.