Crossover And EQ Workflow Card
Project And Measurement Record
Vehicle / project
Date
Technician
Preset / file
Primary listening position
Additional positions
Microphone / calibration
Timing reference
Smoothing / windowing
Measurement level
Driver Capability And Geometry
| Channel / driver | Useful band | Distortion / excursion limit | Directivity limit | Spacing / angle |
|---|---|---|---|---|
Initial Crossover Plan
| Channel | HPF | LPF | Alignment / Q | Level | Polarity | Delay |
|---|---|---|---|---|---|---|
- Gain structure verified before sweeps
- Safe protective filters active
- Baseline preset saved
- Driver capability and directivity reviewed
Acoustic Crossover Measurements
| Driver pair | Individual trace names | Normal sum | Reverse sum / null | Nearby positions | Final action |
|---|---|---|---|---|---|
- Individual magnitude and phase recorded
- Common timing reference used
- Normal-polarity sum measured
- Reverse-polarity comparison measured where useful
- Coverage checked at relevant seats / angles
- Protection, distortion, and excursion remain acceptable
All-Pass Or Phase-Shaping Record
| Channel | Filter order / type | Frequency | Q / parameter | Measured purpose | Group-delay / off-axis result |
|---|---|---|---|---|---|
Target Curve
Target level reference
Match range
LF limit / reason
HF limit / reason
Low-frequency rise
High-frequency trend
Maximum individual boost
Maximum combined boost
Seat / averaging goal
Listening level
EQ Filter Record
| Channel | Type | Frequency | Gain | Q / BW | Measured cause / purpose | Positions verified |
|---|---|---|---|---|---|---|
Final Verification
- Predicted EQ result re-measured on the actual system
- Nearby-position or multi-seat response checked
- No retained boost is filling a deep spatial null
- DSP input, processing, and output headroom rechecked
- Amplifier clipping margin rechecked
- Driver excursion, distortion, compression, and temperature checked
- Every preset and user control tested
- Representative music evaluated at gradually increasing level
- Final preset saved and backed up
Final preset name
Final validation date
Remaining compromise
Next measurement / action