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This Model Has Been Discontinued


Compact, powerful and efficient!


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The REDLINE SA Series amplifiers utilize the latest Class D topology to offer powerful output from an ultra compact chassis. Small space, big power, sizable savings.

The RL-SA500.1 efficiently delivers the power to drive a DD AUDIO loaded enclosure or pair of RL-SW subwoofers. Bandpass crossovers and bass boost capabilities allow precise tuning of the sub stage while the included remote control knob adds the ability to make on the fly adjustments of the subwoofer volume.

With the ability to utilize either RCA Line Level or High Level inputs, the REDLINE SA Series amplifiers provide easy factory integration without the need for a line output converter or aftermarket head unit.

The REDLINE SA Series amplifiers are equipped with set screw power and speaker terminals offer secure and reliable connections usually reserved for higher end amplifiers.

Learn more about the DD REDLINE Series products.


  • Variable 12dB Crossovers
  • Class D Topology
  • Hi Level Inputs
  • Set Screw Power and Speaker Terminals
  • 6dB Bass Boost
  • Remote Control

RL-SA500.1: 500 Watt – Subwoofer Monoblock Amplifier

Operating Voltage: 10 - 16
Test Voltage: 14.4
Output Channel(s): 1
Continuous Wattage @4ohm: 250
Continuous Wattage @2ohm: 390
Continuous Wattage @1ohm: 500
Dynamic Wattage: 1000
Max Current Draw (Amps): 50
RCA Input Voltage Sensitivity: 6 - 2.5
High-Level Input Voltage Sensitivity: 20 - 1.1
RCA Input S/N: > 85
Damping Factor: > 70
THD: < 0.1%
Bass Boost: 12dB @ 45Hz
Frequency Response (Hz): 10 - 250
Sub-Sonic Filter: 10 - 50
Low-Pass Filter: 30 - 250
ZVL Input: No
Pass Thru Output: No
Remote Control: Remote Included in Box
Power Wire Gauge: 4
Speaker Wire Gauge: 12
Dimensions (Inches): 7 x 3.8 x 1.69
Dimensions (MM): 180 x 96 x 43
Price (USD): 189 each

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. 

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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.