Project And Goal
Vehicle / trim / build:
Listening or competition goal:
Target seats / microphone region:
Frequency range and maximum level:
Available external volume / mass:
Enclosure Modeling And Verification Workflow
Use one sheet per driver and enclosure revision. Keep the model, the as-built box, the high-level limits, and the vehicle result tied to the same version.
Driver State
Driver model / sample / serial:
Published or measured parameter source:
Cool / warmed / break-in state:
Measurement voltage / fixture / series R:
Parameter method and date:
Small-Signal Parameters
Re / Le model:
Fs / Qes / Qms / Qts:
Vas / Mms / Cms / Bl / Sd:
Nominal / minimum Z / phase:
Repeatability or fit notes:
Candidate Alignment
Sealed / vented / 4th / 6th / other:
Why this candidate survives:
Response / delay / output target:
Excursion and thermal margin:
Reason rejected alternatives failed:
Chamber Volume
External dimensions / CAD revision:
Internal gross volume:
Driver displacement:
Port walls / braces / dividers / hardware:
Final net volume per chamber:
Port Or Passive Element
Area / aspect ratio / count:
Geometric and effective length:
Flares / bends / shared walls:
Entrance and exit clearances:
Modeled max flow / speed / voltage:
Losses And Construction
Leak / absorption / port-loss assumptions:
Fill type / mass / placement:
Wall material / thickness / ribs / braces:
Gaskets / terminals / service access:
As-built tolerance notes:
Low-Level Verification
Measured net volume:
Impedance peaks / Fc / Fb / Q / losses:
Driver and port near-field traces:
Leak / rub / buzz / panel findings:
Model changes after measurement:
High-Level Verification
Amplifier terminal voltage / supply:
Level steps and duration:
Excursion / distortion / compression:
Port noise / output compression / tuning shift:
Temperature / resistance / recovery:
Protection
High-pass type / frequency / slope / Q:
Limiter and maximum approved voltage:
Thermal duty or recovery limit:
Mechanical or port-flow limit:
First stopping condition:
Vehicle Cabin Transfer
Source location / orientation:
Seat and microphone coordinates:
Doors / windows / hatch / seat state:
Near-field versus seat transfer traces:
Nearby-seat tradeoff notes:
Final Approval
Approved preset / source / DSP / amplifier settings:
Approved vehicle states:
Maximum daily / demo / competition duration:
Saved model and measurement file names:
Reviewer / date / revision:
Stop And Re-Model If
- ☐ measured parameters or net volume differ materially from the model
- ☐ an impedance peak, tuning, or loss feature cannot be explained
- ☐ port output compresses or becomes noisy before the target level
- ☐ driver excursion or temperature reaches the limit before the passband goal
- ☐ panel, joint, terminal, or insert motion creates noise or leakage
- ☐ the vehicle transfer creates an unacceptable seat-specific peak or null
- ☐ protection depends on a generic Qts, port-speed, cabin-gain, or hertz-offset rule
Core Equations
Sealed ideal start:
Vb = Vas / ((Qtc / Qts)^2 - 1)
Fc = Fs × (Qtc / Qts)
Port average air speed:
v = volume velocity / port area
Usable capacitor-style energy analogy is not enclosure volume:
Keep acoustic air volume and solid displacement explicit.