v0.1 — engineering preview
Design loudspeaker boxes
in your browser.
WebISD is a fast, technical Thiele/Small simulator for sealed and ported enclosures. Sweep SPL, impedance, cone excursion, group delay and port air velocity in real time — no install, no account.
F₃
28.4Hz
SPL₁W
86.1dB
Qtc
0.707
Fb
32.5Hz
Xmax
19.0mm
V_port
14.2m/s
Features
01
Sealed & ported
Closed-box and 4th-order vented alignments. Tuning derived from real port geometry — diameter, length, count.
02
Six live graphs
SPL, impedance, cone excursion, group delay, phase, and port air velocity. All recompute instantly as you drag.
03
Driver database
Curated T/S parameters from Dayton, JL Audio, SB Acoustics, Skar, Sundown and more. One click to load.