21" Speaker & Subwoofer Drivers
The Load Forge catalog contains 89 21" drivers from 23 manufacturers. Across the group, resonance (Fs) ranges from 26 to 41 Hz and total Q (Qts) from 0.21 to 0.76, which spans high-efficiency pro mid-bass units and dedicated subwoofer motors. Each driver links to its full enclosure design, port sizing and Thiele/Small parameters.
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Drivers
89
Brands
23
Diameter
21"
Fs Range
26–41 Hz
Qts Range
0.21–0.76
Price Range
201.38–1786
Filter 21" Speaker & Subwoofer Drivers by brand
All 21" Speaker & Subwoofer Drivers — parameters & designs
| Model | Brand | Size | Fs | Qts | Vas | Price |
|---|---|---|---|---|---|---|
| pa-113212-sw-fab-by-acr | Acr Speaker | 21" | 34 Hz | 0.54 | 318.5 L | — |
| 21DS115_2 | B & C | 21" | 34 Hz | 0.27 | 204 L | 570.07 GBP |
| BAC21DS115C | B & C | 21" | 32 Hz | 0.21 | 219 L | 571.09 GBP |
| BAC21IPAL | B & C | 21" | 37 Hz | 0.21 | 155 L | 1167.84 GBP |
| BAC21SW115C | B & C | 21" | 33 Hz | 0.36 | 278 L | 555.34 GBP |
| BAC21SW152A | B & C | 21" | 32 Hz | 0.3 | 200 L | 664.57 GBP |
| BAC21SW152C | B & C | 21" | 32 Hz | 0.3 | 200 L | 666.56 GBP |
| 21DS115 | B&C Speakers | 21" | 32 Hz | 0.21 | 219 L | 570.07 GBP |
| 21IPAL | B&C Speakers | 21" | 37 Hz | 0.21 | 155 L | 1167.84 GBP |
| 21SW115 | B&C Speakers | 21" | 33 Hz | 0.36 | 278 L | 555.34 GBP |
| 21SW115 8Ω | B&C Speakers | 21" | 30 Hz | 0.37 | 318 L | 589.46 EUR |
| 21SW150 | B&C Speakers | 21" | 29 Hz | 0.26 | 254 L | 201.38 EUR |
| 21SW152 | B&C Speakers | 21" | 32 Hz | 0.3 | 200 L | 664.57 GBP |
| 21SW152 8Ω | B&C Speakers | 21" | 32 Hz | 0.36 | 200 L | 750.94 EUR |
| B&C 21DS115 DS Series 21" High Energy Neodymium Subwoofer 4 Ohm | B&C Speakers | 21" | 30 Hz | 0.21 | 274.1 L | 854.10 USD |
| B&C 21DS115 DS Series 21" High Energy Neodymium Subwoofer 8 Ohm294-6030 | B&C Speakers | 21" | 30 Hz | 0.23 | 269 L | 854.10 USD |
| B&C 21SW152 21" Professional Neodymium Subwoofer 8 Ohm | B&C Speakers | 21" | 32 Hz | 0.3 | 198.2 L | 982.86 USD |
| B&C 21SW152-4 21" Neodymium Subwoofer 4 Ohm | B&C Speakers | 21" | 32 Hz | 0.3 | 198.2 L | 982.86 USD |
| 21LEX1600Nd | Beyma | 21" | 30 Hz | 0.29 | 305 L | 629.95 EUR |
| 21QLEX1600Fe | Beyma | 21" | 30 Hz | 0.28 | 309 L | 589.95 EUR |
| BMA21LEX1600ND | Beyma | 21" | 30 Hz | 0.27 | 394 L | 505.88 GBP |
| BMA21QLEX1600FE | Beyma | 21" | 30 Hz | 0.28 | 309 L | 486.90 GBP |
| Productos | Beyma | 21" | 30 Hz | 0.29 | 305 L | — |
| Products - Beyma - Professional Speaker Manufacturer since 1969 | Beyma | 21" | 30 Hz | 0.29 | 305 L | — |
| 5010JD | Celestion | 21" | 32.2 Hz | 0.32 | 276.7 L | 395.00 USD |
| NTR21-5010JD | Celestion | 21" | 30 Hz | 0.34 | 220 L | 395.00 USD |
| TSQ2145 | Celestion | 21" | 30 Hz | 0.344 | 253.8 L | 699.00 USD |
| TSQ2160 | Celestion | 21" | 30 Hz | 0.257 | 234.8 L | 900.35 EUR |
| HTS545HE-4 | Dayton Audio | 21" | 26.3 Hz | 0.28 | 179 L | 1050.00 EUR |
| PSS545HE-4 | Dayton Audio | 21" | 28.8 Hz | 0.27 | 212.2 L | 849.00 EUR |
| PSS555-8 21" Pro Subwoofer with 4.5" Voice Coil 8 Ohm | Dayton Audio | 21" | 27.6 Hz | 0.33 | 444 L | 519.98 EUR |
| 9921C D2 | DD Audio | 21" | 26.2 Hz | 0.471 | 161.9 L | — |
| 21iD | Eighteen Sound | 21" | 38 Hz | 0.23 | 143 L | 901.00 EUR |
| 21LW1400 | Eighteen Sound | 21" | 28 Hz | 0.24 | 385 L | 475.00 EUR |
| 21LW2500 | Eighteen Sound | 21" | 29 Hz | 0.37 | 305 L | 530.00 EUR |
| 21LW2600 | Eighteen Sound | 21" | 27 Hz | 0.29 | 332 L | 385.00 GBP |
| 21LW2600 8Ω | Eighteen Sound | 21" | 27 Hz | 0.33 | 333 L | 385.00 GBP |
| 21NLW4000 | Eighteen Sound | 21" | 29 Hz | 0.37 | 305 L | 380.00 GBP |
| 21NLW4100 | Eighteen Sound | 21" | 34 Hz | 0.4 | 219 L | 595.00 EUR |
| 21NLW4100 8Ω | Eighteen Sound | 21" | 36 Hz | 0.46 | 210 L | 456.79 GBP |
| 21NLW9000 | Eighteen Sound | 21" | 29 Hz | 0.34 | 304 L | — |
| 21NLW9001 8Ω | Eighteen Sound | 21" | 32 Hz | 0.31 | 244 L | 576.21 GBP |
| 21NLW9400 | Eighteen Sound | 21" | 33 Hz | 0.35 | 340 L | — |
| 21NLW9600 | Eighteen Sound | 21" | 28 Hz | 0.26 | 390 L | 749.00 EUR |
| 21NLW9601 | Eighteen Sound | 21" | 41 Hz | 0.32 | 123 L | 807.00 EUR |
| 21NLW9601 8Ω | Eighteen Sound | 21" | 37 Hz | 0.29 | 175 L | 654.82 GBP |
| 21NLW9601C | Eighteen Sound | 21" | 38 Hz | 0.29 | 140 L | 781.36 GBP |
| 21NTLW5000 | Eighteen Sound | 21" | 30 Hz | 0.32 | 300 L | 799.00 EUR |
| EMINSW60216 | Eminence | 21" | 29 Hz | 0.31 | 224.6 L | 1087.55 GBP |
| NSW6021 | Eminence | 21" | 30.7 Hz | 0.32 | 224.6 L | 1087.55 GBP |
| NSW6021-124 21" Professional Neodymium Subwoofer | Eminence | 21" | 30.7 Hz | 0.32 | 224.6 L | 1224.99 USD |
| NSW6021-124-21-SPEAKER | Eminence | 21" | 30.7 Hz | 0.32 | 224.6 L | — |
| NSW6021-6 | Eminence | 21" | 29 Hz | 0.31 | 224.6 L | 1087.55 GBP |
| VX21PRO | Esx | 21" | 27.4 Hz | 0.58 | 265.9 L | — |
| 21XL3000 (4Ω) | FaitalPRO | 21" | 32 Hz | 0.22 | 223.5 L | 1299.00 EUR |
| 21XL3000 21" Neodymium Subwoofer 8 Ohm | FaitalPRO | 21" | 30 Hz | 0.25 | 284.6 L | 1786.00 USD |
| 21XL3000-8P | FaitalPRO | 21" | 30 Hz | 0.25 | 284.6 L | 1349.95 EUR |
| FTP21XL3000 | FaitalPRO | 21" | 30 Hz | 0.25 | 284.6 L | 899.00 GBP |
| Colossus Prime 21XS | Fane | 21" | 35 Hz | 0.339 | 266 L | — |
| FaneColossusPrime21NDXL-PreliminarySpecifications0924 | Fane | 21" | 33 Hz | 0.36 | 241 L | — |
| LAVSAF21450AF | LaVoce | 21" | 33 Hz | 0.49 | 241.6 L | 289.00 GBP |
| LAVSAN21450AF | LaVoce | 21" | 33 Hz | 0.28 | 225.3 L | 410.56 GBP |
| LAVSAN21450CF | LaVoce | 21" | 32 Hz | 0.27 | 230.4 L | 410.56 GBP |
| SAF214.50 | LaVoce | 21" | 32 Hz | 0.44 | 250.6 L | 289.00 GBP |
| SAN214.50 | LaVoce | 21" | 33 Hz | 0.28 | 218.3 L | 410.56 GBP |
| SAN214.50-4 | LaVoce | 21" | 32 Hz | 0.27 | 230.4 L | 729.00 USD |
| SAN214.50LD-8 | LaVoce | 21" | 30 Hz | 0.22 | 250 L | 251.15 EUR |
| SAN215.30 | LaVoce | 21" | 33 Hz | 0.33 | 202.1 L | 741.61 EUR |
| SAN215.30-4 | LaVoce | 21" | 31 Hz | 0.27 | 223 L | 753.02 EUR |
| SAN214.50 | Lavoce Italiana | 21" | 30 Hz | 0.34 | 170 L | 780.00 EUR |
| 533-WF04-01 | MISCO | 21" | 32 Hz | 0.53 | 306.9 L | — |
| SD21-125XB | P.Audio | 21" | 35 Hz | 0.38 | 345.6 L | — |
| PD.2150 | Precision Devices | 21" | 26 Hz | 0.24 | 490 L | 720.00 GBP |
| 21SW4000-NDY-2 21" Professional Subwoofer 2 Ohm | PRV Audio | 21" | 30.8 Hz | 0.28 | 284.6 L | 991.91 USD |
| LF21N401 | RCF | 21" | 30 Hz | 0.37 | 374 L | 495.00 EUR |
| LF21N451 | RCF | 21" | 30 Hz | 0.26 | 375 L | 515.34 GBP |
| LF21N551 | RCF | 21" | 35 Hz | 0.33 | 200 L | 558.17 GBP |
| LF21X451 | RCF | 21" | 28 Hz | 0.37 | 385 L | 458.44 GBP |
| 21NPW | REDCATT | 21" | 35 Hz | 0.32 | 149 L | 599.95 EUR |
| 21XR | REDCATT | 21" | 32.3 Hz | 0.5 | 194.4 L | — |
| DR-21-002-4R-B2-C0001 | REDCATT | 21" | 35 Hz | 0.32 | 149 L | — |
| DR-21-003-8R-B2-C0001 | REDCATT | 21" | 32.3 Hz | 0.5 | 194.4 L | — |
| Nero-21SW1100 | SB Audience | 21" | 28 Hz | 0.31 | 340 L | 589.00 EUR |
| NERO-21SW1100D | SB Audience | 21" | 32 Hz | 0.34 | 312.6 L | 425.41 EUR |
| NERO-21SW1100D-8 | SB Audience | 21" | 32 Hz | 0.34 | 313 L | 425.41 EUR |
| ROSSO-21SW800 | SB Audience | 21" | 38 Hz | 0.76 | 224.4 L | 399.20 EUR |
| ROSSO-21SW800-8 | SB Audience | 21" | 33 Hz | 0.54 | 318.5 L | 399.20 EUR |
| 21 S 4 PL | SICA | 21" | 34.6 Hz | 0.3 | 255 L | 332.26 EUR |
| TN-21X451 | ZTZ Audio | 21" | 35 Hz | 0.33 | 315 L | — |
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