Skip to content
APEX Customs Store
, ,

BLAM RA 501 D – amplifier

R5,849.00

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.

Available to order - stock confirmed before dispatch

WhatsApp Us
SKU: BLAM-RA501D Categories: , ,

Free nationwide delivery on this product

Mobicred through PayFast Buy now. Repay at your pace.
3 months R2,017 estimated per month
6 months R1,035 estimated per month
12 months R544 estimated per month

Select Mobicred on the secure PayFast payment screen.

Final online selling price
Prefer certainty before payment?Supplier stock changes daily. Ask APEX to confirm this exact SKU first. Checks received now resume Thursday, 29 October 2026 at 08:00 SAST.
Check live stock
Comparing this model?

Build a live shortlist by product type, budget and brand. Fitment and complete-system compatibility remain separate checks.

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 Crossover35 Hz – 500 Hz (12 dB/octave)
Frequency Response15 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 output300 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.

Brand

BLAM

BLAM range

Relax

Product group

Amplifiers

Supplier stock state

Confirm availability

Frequency Response

15 Hz – 500 Hz

Rms Power (4 Ω)

300 W

Rms Power (2 Ω)

500 W

Low Pass Crossover

35 Hz – 500 Hz (12 dB/octave)

Dimensions (L X W X H)

198 x 91.4 x 36 mm – 7.8’’ x 3.6’’ x 1.4’’

Amplifier output

300 W RMS at 4 Ω and 500W RMS into 2 Ω

Make a confident choice

What matters for this product

Open Help Centre
APEX SIGNAL

Useful product intelligence. Nothing noisy.

Selected new products, honest comparisons and the best work leaving the APEX workshop.

Scroll to Top