Start where you're comfortable.

A free, all-in-one loudspeaker design tool — enclosure and crossover calculators with a parts list. The numbers follow standard Thiele/Small acoustics.

Free · no account · works offline.

Or open a completed build to learn from — parts, box and crossover.

Tools

Enclosure designersealed · ported · bandpass · PR Crossover designer2-/3-way · Butterworth · LR Driver databaseThiele/Small · provenance Sealed boxQtc · Fc · F3 from Fs, Qts, Vas Ported boxSuggested Vb + Fb, EBP check Port lengthVent length + chuffing check Transmission line¼-wave line length L-padSeries/shunt R + wattage All tools & calculatorsThe full index

Featured builds

All builds

Bookshelf≈ $360

"Reference Compact" — sealed RS225 + ND25FA bookshelf

Dayton Audio RS225-4 + Dayton Audio ND25FA-4

sealed · 20 L

Tower / floorstanding≈ $760

"Slim Towers" — twin Scan-Speak 18W + Seas 27TBFC floorstander

Scan-Speak 18W/8531G00 + Seas 27TBFC/G H1212-06

ported · 60 L

Subwoofer≈ $260

"Tight Ten" — sealed 10" Peerless SLS subwoofer

Peerless by Tymphany SLS-P830668

sealed · 70 L

Full-range / other≈ $130

"Deskmate" — ported Tang Band W5 single-driver mini

Tang Band W5-1611SAF

ported · 14 L

Enclosures: sealed, ported, bandpass, passive radiator. Crossover: 2-/3-way Butterworth & Linkwitz-Riley. The driver database, BOM and SEO surface land in later milestones.