Mosconi HLA-DUAL 4-channel high-low adapter, high power

The Mosconi HLA-DUAL is a compact, 4-channel, high-low adapter that reliably generates remote signals in vehicles with high-power head units (BTL outputs). It was developed for OEM audio architectures where classic ignition or remote signals are unavailable.

As with the HLA-SLIM, the HLA-DUAL has a plastic housing and pluggable connectors. This keeps the module very small, allowing it to be integrated directly into the wiring harness or in the immediate vicinity of the head unit — ideal for installations with limited space.

The integrated remote output can handle up to 100 mA and enables the automatic switching on of amplifiers or digital signal processing (DSP) systems. Remote generation is based exclusively on the detection of the constant DC voltage present at the BTL outputs of modern, high-power head units.

An applied voltage of at least 3 V DC at one input is a prerequisite for operation. The HLA-DUAL does not evaluate the music signal but rather only the existing DC voltage of the BTL outputs. This ensures stable, interference-free remote generation.

Features

• 4 channel high-low adapter
• Compact, slim design
• Remote generation

Manufacturer Specifications

Standby power consumption: < 0.8 mA

Operational power consumption: < 15 mA (< 30 mA in the Dual version)

Protection against polarity reversal: Yes

Maximum permissible current at remote out: 100 mA (normal operation)

Minimum permissible load at remote out: 120 Ohms (normal operation)

Remote Out Voltage: > 12 V at Irem-out < 100 mA

Remote Out Short Circuit Protection: Yes (to ground)

Maximum short-circuit duration at Remote Out: < 10 second (*)

Total harmonic distortion: < 0.01 %

Rate of increase: 10 V/uS

S/N signal-to-noise ratio: > 100 dB

Channel separation: > 60 dB

Common-mode noise suppression: > 60 dB

Downward conversion ratio: 4:1 V/V

High-level input ballast impedance: 45 Ohms / 2 W each channel

Maximum continuous power (sine wave) at 4 Ohms: 25 Wrms x CH

Maximum permissible rated load capacity of the head unit: 50 W x CH (**)

Maximum output signal at THD: < 0.1 % 3.2 Vrms

Minimum output load impedance: 2 kOhms

(*) Exceeding the maximum permissible time may result in permanent damage to the device.
(**) This is the maximum actual RMS rated power, not PMPO, peak, etc.

(RMS = Root Mean Square, measure of continuous power in audio devices)

Manufacturer Documents

MANUAL for Mosconi HLA-DUAL Adapter

catb v1 03.25.2026