RB-03 vs Parasound HCA-750A
The HCA-750A's power @ 8ω is 75W against the RB-03's 70W, its signal-to-noise 105 dB against 116 dB, its thd 0.060% against 0.030%, and its damping factor >800 against >500.
AI-generated product photo — not official manufacturer imagery.
AmplifiersPower AmplifiersDiscontinued
Estimated price (community-sourced)
$250
Around — community and catalog average, updates slowly
About the RB-03
The Rotel RB-03 is a stereo power amplifier designed for audiophiles seeking high-quality amplification in a compact, reliable package. It features a highly regulated power supply with a custom-designed toroidal transformer, ensuring ample power reserves and stable performance even with demanding audio signals. The amplifier uses symmetrical circuit traces, metal film resistors, and polystyrene or polypropylene capacitors in critical signal paths for faithful music reproduction. The RB-03 is praised for its crisp, smooth sound and ability to drive difficult speakers with ease. It also supports bridged mono operation for increased power output, though this requires internal jumper adjustments by a qualified technician.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 8Ω
- 70W @ 8Ω
- Damping Factor
- >500
Analog Output
Analog signal output specifications
- THD
- 0.030%
- SNR
- 116 dB
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 435 × 92 × 334 mm (W × H × D)
- Weight
- 7.5 kg (17 lbs)
Key Specifications
Power: 70W
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions