FEATURES

Dual 8" polypropylene cone woofers
Large port area for extended low-frequency performance
Dual-chamber ported bandpass cabinet
Defeatable passive 120 Hz low-pass filter with impedance compensation
250 watts continuous power handling, 700 watts peak
70/100 V multitap transformer with 8 ohm bypass
Yoke mount and flying hardware included
Marine grade plywood construction

Package Includes:

AD-S28Tw loudspeaker
Yoke mount
Suspension hardware kit
Grille backing cloth

SPECIFICATIONS
AD-S28Tw
Configuration Surface mount bandpass subwoofer, ported
Low-frequency transducer Dual 8" (200 mm) weather resistant, polypropylene cone woofers, rubber surround
Frequency range ¹
  Frequency response (-6 dB)
  Useable frequency range (-10 dB)
42 to 165 Hz
36 to 205 Hz
Filter 120 Hz low-pass, passive, bypassable
Maximum output ²
  Calculated peak / continuous Output
  2 pi (half space)
  4 pi (full space)

124 dB SPL / 118 dB SPL
118 dB SPL / 112 dB SPL
Nominal impedance 8 ohms
Power rating
Continuous power handling³
Recommended max amp power
250 W (2 hours IEC)
500 W (loudspeaker "program" power)
Sensitivity 94 dB, 2.83 V at 1 m, half space (2 pi)
Transformers
Type Custom low distortion laminated core, wide bandwidth design
Taps 70V: 200, 100, 50, 25 W; 8Ω bypass
100V: 200, 100, 50 W; 8Ω bypass
Enclosure
Material Marine grade plywood, ABS, steel grille
Environmental Exceeds Mil Spec 810 for humidity, salt spray and dust; IEC 60529 IP-X4 splash rating
Finish Textured black paint
Grille Painted steel
Connectors Four-position barrier strip; 2 in / 2 out
Mounting Hardware Black powder coated steel yoke with attachment hardware
Black zinc coated forged shoulder steel M6 eyebolts
Black powder coated steel shear plates with attachment hardware
Black rubber feet with integral threaded bolt
Weight 43 lb (19.5 kg) / 55 lb (25 kg)

¹ All frequency ranges specified refer to measured free field response.
² Calculated SPL at 1 m, speaker operating at rated RMS power with pink noise within specified frequency range
³ Maximum input power tested in accordance with IEC 268-5 recommendations, 50 Hz