# BoxLab: Speaker Box Designer — Enclosure, crossover & horns

> Enclosure, crossover & horns (iPhone/iPad app by Domenico Ungaro.)

- Source: https://appshunter.io/ios/app/boxlab-speaker-box-designer/id6819425411 (this page in markdown: same URL + `.md`)
- Developer: [Domenico Ungaro](https://appshunter.io/developer/6819425413)
- Category: Utilities, Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 25 MB
- Languages: American English
- Released: 2026-11-02
- Data updated: 2026-11-06

## What is BoxLab?

BoxLab is the complete loudspeaker design tool for your phone. Start from your driver's Thiele/Small parameters and end up with the final design, 3D dimensions, charts and a shareable PDF.

ENCLOSURE DESIGN
• Sealed box with rigorous Qtc, Fc, F3 calculations — canonical T/S model
• Bass reflex with 5 alignment families (B4, QB3, C4, SBB4, SC4)
• 4th-order bandpass
• Passive radiator (Small 1974 model with Qmp and Fp tuning)
• Horn (exponential, tractrix, Le Cléac'h, hyperbolic, conical)

PASSIVE CROSSOVER 2/3-WAY
• Butterworth, Linkwitz-Riley, Bessel filters (1st-4th order)
• Simulation with real driver impedance (motional impedance included)
• Zobel network + L-pad for tweeter attenuation
• Manual override of every L/C value

MULTI-DRIVER CONFIGURATIONS
• Parallel, Series, Series-Parallel
• Isobaric Series / Parallel (Vas halved → half the enclosure size)
• Push-Pull with HD2 cancellation (~12 dB)

INTEGRATED 3D RENDERING
• Cabinet in oblique projection for every project
• 6 ratio presets: Golden, EBU, Sepmeyer, Louden, Cube, Custom
• Drivers, port and passive radiator placed on the baffle
• Internal/external dimensions, total panel area

MEASUREMENT TOOLS
• Real-time SPL meter with A/C/Z weighting + LAeq
• 1/3-octave spectrum (16 Hz - 16 kHz)
• In-room measurement (Pro): pink noise or sweep + mic → measured vs predicted overlay
• HD2/HD3/THD distortion analysis (Pro) with push-pull toggle

DATABASE & PROJECTS
• Unlimited driver database
• Paste-import drivers directly from datasheets — the parser extracts Fs, Qts, Vas etc. automatically
• 4 demo drivers preloaded
• Save projects and multi-module Systems (woofer + tweeter + crossover)
• PDF export with vector charts, share and print

OFFLINE & PRIVACY
• 100% offline, no connection required
• No data collected, no analytics, no ads
• 9 languages: IT, EN, DE, FR, ES, JA, ZH, ZH-Hant, KO

PRO ONE-TIME PURCHASE
The free version includes sealed box, bass reflex, 2-way crossover, 3D box dimensions, the SPL meter, the full driver database and up to 3 saved projects. Pro unlocks bandpass, passive radiator, horn, 3-way crossover, in-room measurement, distortion, multi-module systems, PDF export and unlimited projects. One-time payment, no subscriptions.

Mathematically validated: 93 unit tests cover Thiele/Small, multi-driver, crossover and the parameter parser.

For: DIY hobbyists, speaker builders, audio technicians, acoustics students.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| BoxLab Pro | $8.99 | one-time |


## Is BoxLab safe?

Not enough ratings yet to assess BoxLab.

## Is BoxLab legit?

BoxLab: Speaker Box Designer has limited verification signals. The AppsHunter Legitimacy Score for BoxLab is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.4 — 2026-11-04

BoxLab's App Store page is now in nine languages. The app also opens on a proper launch screen that follows light and dark mode, instead of flashing white.

### 1.0.3 — 2026-11-02

No release notes.

## Related topics

[box design](https://appshunter.io/ios/topics/box-design)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*