This Model Has Been Discontinued




Search Authorized DD AUDIO Dealers Near You    

Show results within of

Unique Audio

8178 Newington Rd, Lorton, VA, USA


Don’t have a DD AUDIO dealer near you? Contact us online or call us at 405-239-2800 to purchase direct.

The D4.75 is a mini chassis amp designed to make space constrained installations a breeze. Don’t be fooled by its small stature; in 4 ohm bridged mode this little powerhouse can produce over 2 x 180Watts.  It also features a conformal-coated PCB for added moisture and dust protection in harsh environments; making it perfect for motorcycles, UTVs, and boats.

All controls and connections are located on one side for ease of installation in motorcycle fairings, dashes, under seats, behind seats or in consoles.


  • Conformal Coated PCB
  • 5-way Protection
  • Variable 12dB/Oct
  • Heavy Duty PCB
  • RCA Signal Pass-through
  • MOSFET Power Supply Amplifier

D4.75: 300 Watt – Mini 4 Channel Amplifier

Test Voltage: 14.4
Output Channel(s): 4
Continuous Wattage @4ohm: 75 x 4 / 180 x 2
Continuous Wattage @2ohm: 90 x 4
Max Current Draw (Amps): 40
RCA Input Voltage Sensitivity: 6V ~ 0.2V
RCA Input S/N: > 90dB
Damping Factor: > 100
THD: < 0.2%
Frequency Response (Hz): 10Hz - 27kHz
Sub-Sonic Filter: 50Hz - 5kHz
Low-Pass Filter: 50Hz - 5kHz
Pass Thru Output: No
Power Wire Gauge: 2 x 18
Speaker Wire Gauge: 18
Dimensions (Inches): 6.2 x 3.9 x 1.7
Dimensions (MM): 160 x 100 x 45
Shipping Weight (Lbs): 3
Price (USD): 315 each

The D Series amplifiers are designed to be the best amps on the market for the everyday mobile audio enthusiast.  These class D amplifiers feature compact chassis, superb sound quality, reliable circuits, and powerful output sections. They’re available in several channel and power configurations assuring there is a D Series amp to power your system.

DD Audio
4025 NW 36th Street
Oklahoma City, OK 73112
(405) 239-2800 | Fax: (405) 239-7100