MAX D2 vs Subwoofer Box Pro

Adjustable crossover ( HPF / LPF / BPF from 20 Hz to 20 kHz ) Selectable crossover slopes ( 6 to 48 dB/oct ) Crossover types ( Bessel / Butterworth / Linkwitz-Riley ) Equalizer ( 10 x 31 bands ) Time alignment ( 0-20 ms / 0-692 cm / 0-272" ) Selectable phase shift ( 0 or 180 degrees ) 6 Memory presets

Subwoofer Box Pro is the most accurate enclosure design tool available for car audio — built for enthusiasts, installers, and DIY builders who refuse to guess. Whether you're dialing in a tight sealed enclosure for daily driving or engineering a 6th order bandpass for maximum SPL, Subwoofer Box Pro handles every calculation so you can focus on what matters: the build. Design sealed, ported, bandpass, 4th order, and 6th order enclosures with confidence. SMART ADVISOR The built-in Smart Advisor analyzes your subwoofer's Thiele/Small parameters and automatically recommends two optimized enclosure builds per box type. No trial and error. No second-guessing. Just proven designs tailored to your specific driver and quantity, ready to build. PRO-GRADE CALCULATIONS Volume, port tuning, port velocity, and displacement are calculated accurately and updated in real time. Use interactive sliders to adjust width, height, and depth while the app auto-recalculates airspace to keep everything within spec. Every number you see is a number you can trust. SPEAKER DATABASE AND CUSTOM ENTRIES A built-in speaker database comes loaded with Thiele/Small parameters for popular drivers. Don't see yours? Add any custom speaker in seconds and the app incorporates it instantly into your calculations and Advisor recommendations. VISUAL PREVIEWS Watch your enclosure come to life with realistic 2D cutaway drawings and 3D previews that dynamically reflect your chosen box style and exact dimensions. See it clearly before you build it. CUT LISTS AND PDF EXPORTS When your design is locked in, Subwoofer Box Pro generates a complete cut list with material thickness, kerf, and waste factor — so you know precisely what to cut before you ever touch a saw. Export professional build sheets and cut lists to PDF and share them with customers, fabricators, or your crew. If you take car audio seriously, this is the tool you've been waiting for. Download Subwoofer Box Pro and build it right the first time.