SA400 vs Dayton Audio SPA-250
The SPA-250's signal-to-noise is 90 dB against the SA400's 84 dB, its power @ 4ω 250W against 400W, and its thd 1.000% against 0.030%. Both share class (AB).
AI-generated product photo — not official manufacturer imagery.
SA400
RBH SoundAmplifiersPlate / Subwoofer AmplifiersDiscontinued
Estimated price (community-sourced)
$200
Around — community and catalog average, updates slowly
About the SA400
The RBH Sound SA-400 is a professional-grade subwoofer amplifier featuring discrete Class A/B amplification technology. It delivers 400 watts of RMS power at 4 ohms and includes an adjustable crossover system with a range of 40Hz to 180Hz (±3dB). The amplifier supports both line-level and speaker-level inputs, making it compatible with various audio system configurations. It features automatic turn-on sensitivity and a 15-20 minute turn-off delay for convenient operation. The SA-400 was discontinued in June 2013 but remains a sought-after component in the used audio market for its robust construction and reliable performance.
Specifications
Power Specifications
Amplification power output and characteristics
- Power @ 4Ω
- 400W @ 4Ω
- Amplifier Class
- AB
- Damping Factor
- >200
- Input Sensitivity
- 0.1V RMS
- Input Impedance
- 47Ω
Connectivity
Input and output connections
- Bluetooth
- No
- Wi-Fi
- No
- Ethernet
- No
- Analog Inputs
- Line-level, Speaker-level
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 450 × 101 × 355 mm (W × H × D)
- Weight
- 11.34 kg (25 lbs)
- Available Colors
- Black
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions