W 21

749 US $ per unit

Contact us to get a quote with shipping at contact@liiaudiohifi.com

Scale, Depth, and Precision for Serious Low-End

The Lii Audio W-21 is a flagship 21-inch woofer crafted for audiophiles, builders, and designers who require deep, authoritative bass with musical accuracy. Built around a massive 220 mm Ceramic Y38 magnet, a 100 mm voice coil, and a highly efficient motor system, the W-21 achieves a stunning 98 dB sensitivity, allowing it to pair effortlessly with tube amps or low-wattage setups while delivering deep extension down to 25 Hz.

With a resonant frequency of just 25 Hz, exceptionally large VAS (1148L), and an Xmax of 8 mm, this driver excels in open-baffle, folded horn, and large cabinet applications where low-end clarity and physical presence matter most.

Key Features

21" high-efficiency woofer for full-range or sub-bass reinforcement
98 dB sensitivity — excellent for low-watt, high-fidelity systems
Ceramic Y38 magnet — large motor structure for tight, powerful bass
100 mm voice coil — handles high power with control and stability
Extended range from 25 Hz to 3 kHz — suitable for two-way systems
Rated 150 W RMS / 500 W peak — dynamic and capable performance

Technical Specifications

Resonant Frequency (Fs)
25 Hz

Frequency Response
25 Hz – 3,000 Hz

Vas
1148 L

Re (DC Resistance)
7.8 Ohms

Sensitivity (SPL)
98 dB (1W/1m)

Qms
1.873

Qes
0.607

Qts
0.459

Sd (Cone Area)
180.96 cm²

Cms
246.992 µM/N

Mms
151.9 g

Mmd
107.6 g

Le (Voice Coil Diameter)
100 mm

Nominal Impedance
8 Ω

Max Power
500 W

Rated Power
150 W

Xmax
8 mm

Bl
17.848 T·m

Magnet Diameter / Material
220 mm / Ceramic Y38

Nominal Diameter
542 mm (21")

Installation Notes

Ideal for large open baffle, horn-loaded, or reflex enclosures
Pairs beautifully with Lii Audio full-range drivers for a full-range 2-way system
Designed for tight, natural bass with no bloat or boom
Handles high dynamics without sacrificing musical detail
Sold individually