Description
- Driver: 1 × 21"
- Frequency response: 27 - 125 Hz
- Power capacity program / peak: 3600 / 7200 W
- Impedance: 8 Ω
- Sensitivity 1 W / 1 m: 98 dB
- SPLmax / 1 m: 137 dB
- Dimensions (H × W × D): 706 × 606 × 800 mm
- Weight: 54.5 kg / 120 lbs
Key facts:
- Specially developed 21-inch driver for precise reproduction of lower lows
- Further developed port design ensures maximum precision with minimal distortion
- Horizontal and vertical stackability allows flexible combinations with other TWAUDiO products
- Two operating modes: “Extended Low Frequency” mode for ultra-low frequencies and “Full” mode for direct use with tops such as the T24N or M15
- Optimized presets for directional subwoofer clusters with broadband cancellation (>17 dB) at the rear
- Can be used as a stand-alone subwoofer or for low-frequency extension in mixed subarrays
Precise low-frequency and full-range sub
The TWAUDiO B21 subwoofer enriches the overall sound experience by extending the sound system's frequency range to include the lowest frequencies in the audible spectrum. Whether as part of a large array or as a stand-alone subwoofer in conjunction with a top unit.
With its newly developed 21-inch driver, an optimized port design and 30 Hz tuning, the B21 delivers extremely precise reproduction. And it does so with minimal distortion. No matter whether the fundamental basslines of electronic music are being amplified or the low end is being used to inspire listeners at live concerts, the B21 delivers.
Stack'n'play
The B21 integrates seamlessly into the PA-SYS-ONE with our classics B30 and T24N, both technically and visually, and offers the same mechanical design throughout, with stacking grooves for B30 on both a long and short side. Two spigot holes for vertical and horizontal applications, as well as the use of the existing QDB30 Quad-Dolly, round off the flexibility.
The B21 can do more
It also forms the stand-alone basis for small to medium-sized PA setups. In addition to the normal “Extended Low Frequency” preset, a special “Full” preset has been developed that allows the B21 to be used directly with tops. This preset is designed to deliver the bass impact of a typical 18-inch sub, but with the extended frequency range that only a 21-inch driver can provide. Whether on a small club stage as a B21 / M15 combination or in a medium-sized location with three B21s and a T24N top per side.
Even more possibilities
The B21 is ideal for cardio applications: in directional vertical or horizontal arrangements, broadband attenuation of more than 17 dB is achieved behind the cluster.
In mixed subarrays, for example with VERA S32 / S33 cardio subwoofers or B30 / B18 clusters, the B21 adds significantly low-frequency content, making it a powerful, precise and effective addition.
This makes the B21 the perfect solution for the high demands of today's listening habits in the live and club sector. Its superior design, flexible integration options and precise low-frequency reproduction guarantee a deep, tangible bass that thrills every audience – from small venues to large stages, and with a wide range of set-up and application options.
