ROTEL RB-990BX // Preowned / Solid-State Stereo Amplifier

The ROTEL RB-990BX is a no-nonsense, high-current powerhouse from the golden age of serious solid-state amplification—built for control, clarity, and long listening sessions without fatigue. Delivering a stout 200 watts per channel, this amp has the kind of grip that wakes up demanding speakers while keeping everything composed and musical. Sonically, it’s classic Rotel: tight, authoritative bass, a clean and open midrange, and highs that stay smooth even when you lean on the volume. There’s nothing flashy here—just a big toroidal transformer, robust output stage, and a workmanlike design that puts sound first. The RB-990BX is the kind of amp that quietly earns your trust, then keeps delivering night after night

S/N: 729226859

RESTORATIONS

• Comprehensive bench test
• Cleaned controls, switches, and internal electronics
• Tests at factory spec
• Exterior detailed

FACTORY SPECS

Power Output: 200 watts per channel into 8Ω (stereo); 300 watts into 4Ω.
Frequency Response: 4Hz - 100kHz.
Total Harmonic Distortion (THD): 0.03%.
Damping Factor: 1000.
Input Sensitivity: 1V.
Signal-to-Noise Ratio (SNR): 120dB.
Speaker Load Impedance: Minimum 4Ω.
Dimensions: 440mm (W) x 120mm (H) x 375mm (D) (approx. 17.3" x 4.7" x 14.8").
Weight: 15.5 kg (34.1 lbs).
Power Consumption: 550 watts.