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| Product Details | |
|---|---|
| Brand | B&C Speakers |
| Model | 21DS115-4 |
| Part Number | 294-6032 |
| UPC | 848864050621 |
| Unit of Measure | Each |
| Weight | 37.7 |
| Product Specifications | |
|---|---|
| Nominal Diameter | 21" |
| Bolt Circle Diameter | 20.7 |
| Power Handling (RMS) | 1700 Watts |
| Power Handling (MAX) | 3400 Watts |
| Impedance | 4Ω |
| Frequency Response | 30 to 1,000Hz |
| Sensitivity | 99dB 2.83V/1m |
| Voice Coil Diameter | 4.5" |
| Thiele-Small Parameters | |
|---|---|
| Resonant Frequency (Fs) | 30Hz |
| DC Resistance (Re) | 2.2Ω |
| Voice Coil Inductance (Le) | 2.4mH |
| Mechanical Q (Qms) | 11 |
| Electromagnetic Q (Qes) | 0.2 |
| Total Q (Qts) | 0.21 |
| Compliance Equivalent Volume (Vas) | 9.68ft³ |
| Mechanical Compliance of Suspension (Cms) | 0.068mm/N |
| BL Product (BL) | 29.23T·m |
| Diaphragm Mass Inc. Airload (Mms) | 412g |
| Maximum Linear Excursion (Xmax) | 15mm |
| Surface Area of Cone (Sd) | 1681cm² |
| Materials of Construction | |
|---|---|
| Cone Material | Treated Paper |
| Surround Material | Cloth |
| Voice Coil Wire Material | CCA |
| Voice Coil Former | Fiberglass |
| Basket / Frame Material | Cast Aluminum |
| Magnet Material | Neodymium |
| Mounting Information | |
|---|---|
| Overall Outside Diameter | 21.54" |
| Baffle Cutout Diameter | 20" |
| Depth | 10.04" |
| # Mounting Holes | 8 |
| Parts Express Staff Recommended Enclosure Volume | |
|---|---|
| Vented Volume | 6.5ft³ |
| Vented F3 | 32.7Hz |