★★★★★
Average rating on the App Store. Apple doesn't publish how many ratings each star has.
Where this app stands in Romania, updated 12 Nov 2026
Top free
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Top paid · All apps and games
#77 –
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Fixed a bug that doesn't display the pdf with IOS 12. Fixed other minor bugs
An application designed to maximize the performance of a subwoofer in bass reflex. Calculates the size of the box in Bass Reflex enclosure following: • BB4 (4th Order Boom Box) / SBB4 (Super 4th Order Boom Box). • QB3 (Quasi 3th Order Butterworth) / SQB3 (SuperQuasi 3th Order Butterworth). • C4 (Chebyshev to ugual ripple) / SC4 (4th Order Sub-Chebyshev). • Maxim Flat. • Box losses Ql 3, Ql 7 and Ql 15. • Graphic for Frequency Response, Displacement-L. SPL, Thermally-L. SPL, Max Power SPL and Maxim Excursion. • E.B.P. (Efficiency Bandwidth Product). • Full results data: Sensibility Spl, Efficiency Spl, db Peak Level, Fmax, Re Total, Qes Total, Qts Total, Sd, Vd, Cms, Mms, Bxl, Cmes, Rms, Res. • Calculate Accord in Round or Square form. • Three correction types for each end of the port. • Select up to 6 Accord. • Results of Area, Volume, Length. Selecting the shape and calculation of the volume of the box. Designs the box in the following forms: - Cube / Rectangular Parallelepiped - Triangle Prism - Wedge - Wedge2 - Truncated of Pyramid - Hexagonal Prism - Cylinder - Sphere • Detail of panel measurements to build the case with cut PDFs and cut pattern. • Tool for calculating the electric resistance of two or more speakers, single or double coil in parallel, series or series / parallel. • Tool Signal Generator, useful for testing the performance of a subwoofer: • Control of the single Frequency with the slider from 10Hz to 300Hz, Pink Noise, White Noise, Sweep Frequency 300>10Hz and 10>300Hz, Loop and Gain tones. • Tool for calculating the Volume of speaker size. • Saving, sharing or printing projects. • Customization of projects with the possibility to enter the data of your business.