Reliable Class A/B Power


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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 versatile Class A/B RL-LA400.4 will drive DD REDLINE Series Coaxials and components with warm, accurate sound. For added versatility, we’ve included an RCA pass through for chaining to a second amplifier, and the rear channels can be bridged to drive a subwoofer for a complete audio upgrade from a single amplifier! 

When paired with a DD AUDIO SC2 or SC4 active line output converter, the REDLINE LA Series amplifiers provide a seamless factory integrated amplification solution.

The REDLINE LA Series amplifiers utilize spade terminals for clean and secure connections on both the power input and speaker outputs.


  • Variable 12dB Crossovers
  • 6dB Bass Boost
  • Class A/B Topology
  • RCA Pass Through


Operating Voltage: 9 - 16
Test Voltage: 14.4
Output Channel(s): 4
Continuous Wattage @4ohm: 4 x 65 / 2 x 180
Continuous Wattage @2ohm: 4 x 100
Dynamic Wattage: 800
Max Current Draw (Amps): 40
RCA Input Voltage Sensitivity: 6 - 0.25
RCA Input S/N: > 85
THD: < 0.1%
Bass Boost: Rear Ch 6-12dB @ 45Hz
Frequency Response (Hz): 20 - 20k
Low-Pass Filter: 50 - 250
ZVL Input: No
Pass Thru Output: Yes
Power Wire Gauge: Spade Terminal
Speaker Wire Gauge: Spade Terminal
Dimensions (Inches): 13 x 8.5 x 2
Dimensions (MM): 329 x 209 x 51
Price (USD): Contact Dealer

The REDLINE Series amplifiers are designed to be no frills, reliable mobile amplification solutions with all the savings! Available in a monoblock for your subs and a multi-channel for your mids and highs, these amplifiers are loaded with only the best name-brand components to give you big system power and performance. 

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