Enclosure designs

Eighteen Sound 21ID
enclosure designs

Cabinets for the 21ID: a design and a suggested box from Eighteen Sound, and plans builders have published.

21ID · 2 Ω specs and prices All designs

Eighteen Sound’s design

From the maker, with plans to download

Eighteen Sound Manifolded 2x21" band-pass IPAL™ powered subwoofer

Picture: Eighteen Sound

Eighteen Sound design

Manifolded 2x21" band-pass IPAL™ powered subwoofer

Drivers: 2 × 21ID

Plans · PDF Eighteen Sound designs

Eighteen Sound’s suggested box

From Eighteen Sound’s 21ID page

Eighteen Sound’s suggestion220 L vented boxFrom Eighteen Sound’s 21ID page

Net volume: 220L
Tuning: 40Hz

Eighteen Sound gives the volume and tuning only; the port is yours to size.

Open the 21ID in 00 Simulator

Plans from builders

Links to published plans that name this driver

SKHORN
Bandpass horn, 2 × 21-inch, 610 × 812 × 1371 mm
Josh Ricci · free plans hosted by JW Sound
In the plan’s list of drivers
SKRAM
Vented 1 × 21-inch with switchable vents, 610 × 813 × 914 mm
Josh Ricci · free plans hosted by JW Sound
In the plan’s list of drivers

The 21ID

Specs, prices and shops

Eighteen Sound · 21" · 2 Ω21ID

Fs: 38Hz
Xmax: 14.0mm
SPL: 97dB

Qts: 0.23
Vas: 143L
Pe: 1800W

Stock not listed

Each design links to where its maker or designer publishes it. Bits hasn’t built or measured them. How we find designs. Know another design for the 21ID? Tell us.

Eighteen Sound 21IDenclosure designs