Product overview
The RA 501 D amplifier is an ultra-compact Class D mono amplifier designed to enhance your factory audio system by adding a subwoofer. Easy to install and compatible with all car radios, it delivers 300W RMS into 4 Ω and 500W RMS into 2 Ω, providing deep and powerful bass even at moderate volumes.
Key product details
- 300W RMS (4Ω) / 500W RMS (2Ω) power output – ideal for subwoofers
- Adjustable low-pass filter 35 Hz – 500 Hz and bass boost 0–12 dB at 45 Hz
- Réponse en fréquence 15 Hz – 500 Hz pour des basses précises et riches
- Protections against short circuits, reverse polarity and overheating
- Wired remote control included for convenient volume and bass control
- Protections: short circuit / low impedance / reversal of polarity / heat protection
Technical specifications
| Verified product specifications | |
|---|---|
| Rms Power (4 Ω) | 300 W |
| Rms Power (2 Ω) | 500 W |
| Low Pass Crossover | 35 Hz – 500 Hz (12 dB/octave) |
| Frequency Response | 15 Hz – 500 Hz |
| Dimensions (L X W X H) | 198 x 91.4 x 36 mm – 7.8’’ x 3.6’’ x 1.4’’ |
| Official product specifications | |
| Amplifier output | 300 W RMS at 4 Ω and 500W RMS into 2 Ω |
What you are ordering
The exact BLAM model shown above, SKU BLAM-RA501D. Match power, impedance, dimensions and included components to your planned system before checkout.
Technical information verified against the official BLAM product page.


