TH121

The TH121 is a high-output subwoofer utilizing a 21-inch neodymium driver with a 6.5-inch
dual-layer voice coil for exceptional thermal and mechanical power handling. Its performance is
driven by our patented Tapped Horn technology, which is unlike conventional horns or bass
reflex designs, the Tapped Horn uses a driver placed partway down a folded horn path. The
front of the driver radiates directly into the horn’s throat while the rear of the driver is vented
through a tap into the horn, closer to the mouth. This configuration achieves acoustic phase
alignment at the horn’s exit, effectively summing energy from both sides of the driver, this
in-phase alignment effectively doubles the radiating surface area of the driver leading to greater
efficiency and output than would be possible with a traditional design of the same size. The
result is increased output, reduced distortion, and minimized cone excursion under high power,
improving linearity and reliability.

The enclosure is constructed from 13-ply Baltic birch with a PolyUrea coating for impact and
environmental resistance. Interlocking skids provide secure stacking with compatible models
such as the TH118XL, SH96 and SH96HO. Touring and install versions include multiple M10
rigging points, while the Extreme Weather variant replaces plywood with fiberglass-reinforced
polyurethane panels for maximum durability in harsh conditions.

For optimal system integration, use Danley DNA amplifiers or processors, which offer advanced
DSP for precise tuning, protection, and performance optimization.