HELIX AAC.3 - High to Low Voltage Converter | Up to 16V

Upgrade your factory sound system with the Helix AAC.3 high-low converter. Smart signal detection, power save mode & lossless signal transmission.

If you're looking to seamlessly integrate high-end car hifi components into your existing OEM sound system, the Helix AAC.3 is the perfect solution. Designed for Australian car audio enthusiasts who demand top performance, this signal converter is ideal for overcoming the challenges posed by factory radios that lack preamplifier outputs or feature intelligent speaker diagnosis systems.

The Helix AAC.3 is the smartest high-low converter in its class. Thanks to the integrated ADEP.3 circuit, it cleverly bypasses speaker diagnosis in factory car radios, eliminating error messages and preserving all functions like the fader. Unlike conventional high-low converters that can cause distorted sounds and increased total harmonic distortion (THD), the AAC.3 ensures crystal clear audio by preventing these issues. Plus, it reduces the car radio's amp current draw by up to 70%, so it won’t load the amp unnecessarily.

Features

• Smart Signal Detection: The AAC.3’s Double Activation Circuit generates a +12 V remote signal to turn on connected power amplifiers in two ways—either by detecting the DC offset on the speaker outputs of the OE car radio or via an integrated, switchable signal detection with variable sensitivity.

• Power Save Mode: This proprietary feature automatically turns off the remote output if no music signal is detected for more than 2 minutes, preserving battery life and avoiding unnecessary power consumption—especially handy for vehicles with CAN bus systems that keep radios "alive" after you leave.

• High-Quality Preamplifier Signal: Converts the speaker output signal of your factory radio or amplifier into a high-quality preamp signal, allowing easy connection of additional amplifiers or DSPs.

• Wide Frequency Response: Boasting a very wide frequency response from 18 Hz up to 80,000 Hz, the AAC.3 delivers excellent sound quality and is ready for high-resolution audio reproduction.

• Compatibility: Suitable for all factory sound systems, including those with factory-installed amps.

• Premium Build: Features high-quality, sealed, and gold-plated RCA/Cinch connectors for lossless signal transmission.

Technical Specifications

• Max. speaker input level: 16 Volts (= 65 Watts / 4 Ohms)

• Input impedance: 13 Ohms

• Max. output level: 4.0 Volts

• Frequency response: 18 Hz - 80,000 Hz

• Max. current for remote output: 200 mA

• Operating voltage: 7 - 18 Volts

• Dimensions (H x W x D): 77 x 37 x 20 mm / 3.03 x 1.46 x 0.79"

Why Choose Helix AAC.3?

This signal converter is designed for car audio enthusiasts who want to upgrade their factory sound system without losing any OEM features or risking distorted sound. Whether you’re adding aftermarket amplifiers or DSPs, the AAC.3 ensures excellent sound quality thanks to its smart signal detection and power-saving technology. It’s the ideal choice for anyone wanting to enhance their car audio experience while keeping installation straightforward and reliable.

What’s in the Box?

• 1 x Signal converter AAC.3

Upgrade your car audio setup today with the Helix AAC.3 — the smartest, most reliable high-low converter designed for existing OEM sound systems. Perfect for Australian drivers who demand excellent sound quality and seamless integration.