Description
The TH28 is a low-frequency tapped-horn subwoofer designed for professional sound reinforcement. Itโs known for extremely efficient output and very solid, punchy bass.
๐ โTuned Hornโ = uses the enclosure itself to amplify bass โ more output with less amp power.
It is not a consumer sub โ itโs pro-audio gear used in clubs, houses of worship, touring rigs, AV installs, etc.
๐ Typical TH28 Features & Specs
๐น Configuration: Tapped horn subwoofer
๐น Low-Frequency Design: horn / ported enclosure for tight punchy bass
๐น Driver: One large high-excursion woofer (typically 18-inch)
๐น Frequency Response: ~28โ100 Hz (excellent deep extension)
๐น Sensitivity: Very high efficiency (> 100 dB @ 1W/1m)
๐น Max SPL: Very high for size โ designed to support loud PA systems
๐น Power Handling: Very high โ can handle multiple kilowatts when driven by an amp
๐น Enclosure: Heavy-duty plywood + textured paint finish (pro bevel edges)
๐น Connectors:
PowerCon inlet (if active version)
AC outlet passthrough (as your photo shows)
XLR inputs/outputs if it has DSP/amp built in
๐น Coverage: Sub-bass only โ not a full-range speaker
๐น Mounting: Forklift handles / rigging points on some versions
(Note: Danley often custom-specs electronics, so the amp and DSP will vary.)
๐ Powered vs Passive
๐ The TH28 itself can be either:
1) Passive
No internal amp
Requires external power amp(s) + crossover/DSP
Most common pro configuration
2) Active / Powered
Built-in amplifier module
Often with DSP equalization
PowerCon mains input
Very convenient โplug and playโ
Why TH28 is Special
โ
Huge Output for Size โ tapped horn design gives very loud deep bass
โ
Efficient โ requires less amplifier power than conventional subs
โ
Tight, punchy response โ favored by engineers who donโt want boomy bass
โ
Rugged build โ designed for touring & installs
โ
Great partner with Danley full-range boxes (SH/SH-96/DVH/SM series)
โ๏ธ Typical Performance Specs
(Approx โ varies by exact build and amplifier)
Specification
Typical Range
LF Extension
~28โ32 Hz
Nominal Impedance
4โ8 ohms (passive)
Sensitivity
~101โ104 dB
Power Handling
1,000โ3,000 W+
Maximum SPL
> 132 dB
Enclosure
Horn-loaded plywood