21-inch Drivers
LF-21X215
The LF-21X215 is a 21-inch ferrite subwoofer for extreme high-power subwoofer and bass cabinet systems. It handles 2600 W AES (5200 W max) with 95 dB sensitivity and a 38 Hz–800 Hz response. 215 mm voice coil, BL 39.7 T.m. 215 mm voice coil, 5200 W maximum power. Designed for high output touring subwoofer systems.
Specifications
- Nominal Diameter
- 21 inch
- Nominal Impedance
- 4 ohm
- Sensitivity (1W/1m)
- 95 dB
- Frequency Range
- 38 Hz - 800 Hz
- Voice Coil Diameter
- 215 mm
- Net Weight
- 40.64 kg
GENERAL SPECIFICATIONS
Nominal Diameter | 21 inch |
Nominal Impedance | 4 ohm |
AES Power Handling | 2600 W |
Maximum Power | 5200 W |
Sensitivity (1W/1m) | 95 dB |
Frequency Range | 38 Hz - 800 Hz |
Voice Coil Diameter | 215 mm |
Winding Material | PISV |
Former Material | TGL |
Winding Depth | 31 mm |
Magnetic Gap Depth | 11.75 mm |
Xmax (Linear Excursion) | +/- 17.5 mm |
Surround Material | Polycotton |
Surround Design | W-roll |
Magnet | Ferrite, dia. 400 mm |
MOUNTING INFORMATION
Overall Diameter | 550 mm |
Bolt Circle Diameter | 520 x 8 x 6.5 |
Baffle Cut-out Diameter | 500 mm |
Depth | 220 mm |
Net Weight | 40.64 kg |
Shipping Carton Size | 585 x 585 x 290 mm |
THIELE-SMALL PARAMETERS
Fs (Resonance Frequency) | 38 Hz |
Re (DC Resistance) | 3.6 ohm |
Qms (Mechanical Factor) | 6.22 |
Qes (Electrical Factor) | 0.43 |
Qts (Total Factor) | 0.65 |
BL Factor | 39.7 T.m |
Mms (Moving Mass) | 805 g |
Cms (Compliance) | 0.0162 |
Vas (Equivalent Air Load) | 79 liters |
Sd (Piston Area) | 1870 cm2 |
Eta Zero | 5.93 % |