Field Procedure
A repeatable one-seat tuning order. Work top to bottom — from physical verification through time alignment, per-channel EQ and final noise-floor checks — so every measurement is made from the same primary listening position.
Verify physical wiring on every driver. Never set polarity by ear.
Place the RTA microphone precisely at ear level in the primary driver position.
Measure straight-line distances from the mic to the center of each driver. Input distance or time-delay into your DSP based on its specific software requirements.
Apply 24 dB/octave Linkwitz-Riley slopes. Offset the Subwoofer Low-Pass Filter 1/2 octave below the Midbass High-Pass Filter to prevent acoustic peaks.
Play mono pink noise through the Left side (with Sub) and match the RTA output to your target House Curve.
Mute the Left side and repeat the process for the Right side, matching the identical target curve.
Play mono pink noise on both channels together. A 9dB+ drop indicates timing discrepancies or a corrupted input signal.
Use band-limited noise to confirm the acoustic energy centers naturally between the drivers.
Play staging tracks across the dash. If the center image pulls to one side, adjust overall channel gain — do not alter delays.
Listen to a silent track. If tweeter hiss is present, reduce all amplifier gains uniformly until clean.
Need the numbers for Step 4? Calculate LR24 high-pass and low-pass targets for each driver before you start measuring.