Day 5: Equalization

Approach: Parametric EQ, cuts only (no boosts except controlled bass rolloff correction)

EQ 1 — Cabin mode at 60 Hz (subwoofer output): - Center: 60 Hz - Gain: -6 dB - Q: 3.0 (narrow — target only the peak)

EQ 2 — Door resonance 250 Hz (midbass outputs): - Center: 250 Hz - Gain: -4 dB - Q: 6.0 (very narrow notch)

EQ 3 — Crossover peak 3.2 kHz (tweeter outputs): Instead of EQ, reduced tweeter output level by -3 dB. Simpler and cleaner.

EQ 4 — Gentle bass shelf to match target curve: Applied low-shelf filter on subwoofer output: - Frequency: 100 Hz - Gain: +2 dB - Q: 0.7 (broad, musical)

Result after EQ:

Measured response now ±3 dB from 40 Hz to 16 kHz. Significantly improved.