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
Product Details
Characteristics
Filter series
Specifications
Nominal basket diameter
Nominal impedance
Power rating program power
Power rating watts
Resonance
Usable frequency range
Sensitivity
Gap height
Voice coil diameter
Thiele & Small Parameters
Resonant frequency fs
Dc resistance re
Coil inductance le
Mechanical q qms
Electromagnetic q qes
Total q qts
Compliance equivalent volume vas
Peak diaphragm displacement volume vd
Mechanical compliance of suspension cms
Bl product bl
Diaphragm mass inc airload mms
Efficiency bandwidth product ebp
Maximum linear excursion xmax
Surface area of cone sd
Mounting Information
Recommended enclosure volume sealed
Recommended enclosure volume vented
Driver volume displaced
Overall diameter
Baffle hole diameter
Front sealing gasket
Mounting holes diameter
Mounting holes b c d
Depth
Net weight
Shipping weight
Materials of Construction
Coil construction
Voice coil former
Magnet material
Basket material
Cone composition
Surround
Dust cap composition
