🔧 INSTALLER LEVEL: Factory Integration Strategies

AccuBASS and Bass Recovery

Factory head units apply heavy bass cuts at higher volumes (loudness compensation in reverse — bass reduction as volume increases) to protect small factory speakers. When you tap the factory signal and amplify it, these bass cuts carry through to your subwoofer.

The symptom: Sub sounds good at low volume, disappears at higher volumes.

Detection: Record the factory signal output while increasing volume. If bass decreases relative to midrange as volume increases: factory bass management confirmed.

Solutions:

Option 1 — AccuBASS (Helix/Audison): A proprietary algorithm that detects and restores factory bass reduction in real time. Available in Helix and Audison DSPs.

Option 2 — Manual EQ: Measure the factory output at different volume levels. Build an EQ curve that applies progressive bass boost as the DSP detects rising input level (dynamic EQ). Complex but effective.

Option 3 — Find a constant-level factory tap: Some vehicles have a constant-level audio output (navigation system audio output, auxiliary input signal path). Research your specific vehicle.

Illustration note: Signal flow from factory head unit through integration DSP to aftermarket amplifiers showing EQ correction

Input Mixing Matrix

The routing matrix defines how each input connects to each output, with adjustable gain for each path:

Output_n = Σ (Input_m × Gain_mn)

Example configuration for 2-input → 6-output system:

Output 6 sums both channels at −3 dB each — creating a mono subwoofer signal at the correct level.