top of page



Dual 8-inch 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 loudspeakerYoke mountSuspension hardware kitGrille backing cloth



    Configuration Surface mount bandpass subwoofer, ported
    Low-frequency transducer Dual 8-inch (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)
    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
    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
    Net Weight 43 lb / 19.5 kg
    Shipping Weight 55 lb / 25 kg
bottom of page