Skip to main content

This Model Has Been Discontinued


D Series 4 Channel Amplifier


Search Authorized DD AUDIO Dealers Near You    

!!!PRODUCT UPDATE!!!   The D4.100a is being replaced by the D4.125. Same Size, Same Price, More POWER!

Contact your local dealer about preordering the D4.125. If you’re having issues finding a local dealer please contact us directly for assistance. 

D Series amplifiers are compact amplifiers with full size features. The D4.100a is a bridgeable four channel amplifier with a total output power of 640 watts. If you need solid power and clean sound, but don’t have much room to spare, this amp is perfect for the application. Precision tuning is made easy with variable bandpass crossovers and LED clipping indicators. Installation is made easier with single side controls and connections, input mode switches, and auto turn-on options.  For boat, bike, and ATV applications conformal coated internal circuitry and corrosion proof switches offer increased moisture resistance.   Even though the D Series amplifiers are very compact they still employ set screw power and speaker terminals, discrete output sections, and heavy duty anodized aluminum heatsinks. This ensures power management is proper from input to output, increasing both in-use stability and long term durability.



  • Conformal Coated Internal Circuitry
  • Corrosion Proof Switches
  • Full Bandpass Crossovers
  • Auto Turn-On Options
  • Clipping Indicators
  • Differential RCA Inputs
  • 2ch or 4ch Input Mode

D4.100a: 400 Watt – Compact 4 Channel Amplifier

Operating Voltage: 9 - 16
Test Voltage: 14.4
Output Channel(s): 4
Continuous Wattage @4ohm: 100 x 4 / 320 x 2
Continuous Wattage @2ohm: 160 x 4
Max Current Draw (Amps): 64
RCA Input Voltage Sensitivity: 8 ~ 0.2
RCA Input S/N: >85dB
Damping Factor: > 100
THD: < 0.2%
Frequency Response (Hz): 30 - 30k
High Pass Filter: 30 - 5k
Low-Pass Filter: 50 - 5k
Pass Thru Output: No
Power Wire Gauge: 4
Speaker Wire Gauge: 12
Dimensions (Inches): 7 x 4 x 1.7
Dimensions (MM): 180 x 104 x 43
Price (USD): 459 each


If you’re looking for superior motorcycle audio solutions that sound as good on the highway as they do while you’re jammin’ out in the parking lot, we’ve got you covered. From amplifiers to speakers and DSP’s, these products are powerful enough to break through the roars of the ride to give direct, loud and clear sound.

Learn why these products are the superior choice for motorcycle audio solutions.

superior motorcycle audio with VO-W speakers with horn in saddle bags

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.


Included in the Box

  • Hex Wrenches
  • Mounting Screws
  • Spare Switch Jumpers
Jabee Toyota Prius Loaded Enclosure Being Installed

Support Small Business and Enjoy Expert Installation

We believe in supporting brick and mortar dealers and have carefully partnered with small businesses who can provide quality installation and customer satisfaction befitting DD AUDIO® equipment.

Check with your local dealer for stock and promotional discounts.