NSW6021-124 21" Speaker
Our most technologically advanced, high-performance subwoofer now has the flexibility to meet any amplifier and enclosure combination. Its unique bifilar, low-inductance, inside/outside wound, dual 2Ω voice coil features heavy gauge pure copper windings and a reinforced high-temperature fiberglass former. Mirror-image spiders spaced 13 mm apart provide effortless coil control and dynamic balance at maximum excursion.
Designed using advanced measurement and FEA optimization tools, the NSW6021-124 enables easy switching between 1, 2, or 4-ohm amplifier loads while ensuring near zero-inductance transient response. One woofer for all your designs whether vented, horn-loaded, or sealed. Any amplifier, any cabinet, allow us to surpass your expectations.
FEATURES INCLUDE:
- Bifilar, Low Inductance Voice Coil
- Selectable 1, 2+2, or 4Ω
- 21” Nominal Diameter
- 5000 W Program Power
- Spaced Dual Spiders
- 24mm Xvar
Applications
Subwoofer | Pro Audio
Box Type: Vented, Sealed, Scoop Loading, Horn Loading
Specifications
| SPECIFICATION | |
| Nominal Basket Diameter | 21", 533 mm |
| Nominal Impedance* | 1, 2, or 4 Ω |
| Power Rating* | |
| Program Power | 5000 W |
| Watts (AES) | 2500 W |
| Resonance | 30.67 Hz |
| Usable Frequency Range | 25 Hz - 0.6 kHz |
| Sensitivity* | 95.0 dB |
| Magnet Weight | 45 oz. |
| Gap Height | 0.75", 19 mm |
| Voice Coil Diameter | 6", 152 mm |
| Mirror Image Twin Spiders |
13 mm Spacing |
| THIELE & SMALL PARAMETERS | |
| Resonant Frequency (fs) | 30.67 Hz |
| DC Resistance (Re) | 2,9 Ω |
| Coil Inductance (Le) | 1.2m H |
| Mechanical Q (Qms) | 10.38 |
| Electromagnetic Q (Qes) | 0.33 |
| Total Q (Qts) | 0.32 |
| Compliance Equivalent Volume (Vas) | 224.58 liters / 7.93 cu.ft. |
| Peak Diaphragm Displacement Volume (Vd) | 3448.2 cc |
| Mechanical Compliance of Suspension (Cms) | 0.05 mm/N |
| BL Product (BL) | 30.5 T-M |
| Diaphragm Mass Inc. Airload (MMs) | 551 grams |
| Efficiency Bandwidth Product (EBP) | 92.68 |
| Maximum Linear Excursion (Xmax) | 21 mm |
| Surface Area of Cone (Sd) | 1642 cm2 |
| Maximum Mechanical Limit (Xlim) | 40.4 mm |
| MOUNTING INFORMATION | |
| Recommended Enclosure Volume | |
| Sealed | 122.61–181.79 liters/4.33–6.42 cu.ft. |
| Vented | 155.74-481.39 liters / 5.50-17.00 cu.ft. |
| Driver Volume Displaced | 0.379 cu.ft. / 10.72 liters |
| Overall Diameter | 21.65", 549.9 mm |
| Baffle Hole Diameter | 19.83", 503.7 mm |
| Front Sealing Gasket | YES |
| Rear Sealing Gasket | N/A |
| Mounting Holes Diameter | 0.34", 8.6mm |
| Mounting Holes B.C.D. | 20.67", 525mm |
| Depth | 10.39", 263.9 mm |
| Net Weight | 48.1 lbs, 21.82 kg |
| Shipping Weight | 51.6 lbs, 23.41 kgs |
| MATERIALS OF CONSTRUCTION | |
| Coil Construction | I/O Copper voice coil |
| Coil Former | Fiberglass former |
| Magnet Composition | Neodymium magnet |
| Core Details | Vented motor |
| Basket Materials | Die-cast aluminum basket |
| Cone Composition | Wet pressed, X5 cone pulp |
| Cone Edge Composition | Advanced Polycotton surround |
| Dust Cap Composition | Wet pressed, X5 dust cap pulp |
Spec Sheet and Cab Designs
Download Spec Sheet Download Cab Design
Frequency Response
NSW6021-124 21" Speaker