Helix AAC.3 – high-low converter for OEM systems
The HELIX AAC.3 is a high-low converter that derives a stereo preamplifier signal from the speaker outputs of a factory car radio or factory-installed amplifier, making it easy to add external power amplifiers to an OEM sound system.
Its ADEP.3 circuit is designed to bypass the radio’s diagnostic systems, avoiding error messages and the loss of functions such as the fader that conventional converters can cause, while reducing distortion and cutting the current draw of the radio amplifier by up to 70%.
Key Features
- ADEP.3 circuit: bypasses factory radio speaker diagnostics
- Double Activation Circuit: generates a +12 V remote signal either from the DC offset of the speaker outputs or via switchable signal detection with adjustable sensitivity
- Power Save Mode: remote output switches off after 2 minutes without music signal – useful in CAN-bus vehicles that keep the radio active up to 45 minutes
- Microcontroller monitoring: of the music signal and remote generation
- High-Res ready: frequency response 18 Hz – 80 kHz
- Connectors: sealed, gold-plated RCA outputs
- Input: max. 16 V speaker level (= 65 W / 4 Ω), 13 Ω input impedance; max. output 4.0 V
- Start-stop capable: operating voltage 7–18 V; made in Germany
Compatibility
- Suitable for all car radios, including those with factory-installed amplifiers
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″ |
Scope of Delivery
1 x Signal converter AAC.3
