QSC SubWoofer ACOUSTIC DESIGN, model AD-S28Tw
-2 new units in their original box available
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-Dual 8 "polypropylene cone woofers
-Large port area for extended low-frequency performance
-Defeatable passive 120 Hz low-pass filter with impedance compensation
-250 watts continuous power handling, 500 watts RMS
-See photos
see full technical specification below;
Specifications;

Configuration

Surface mount bandpass subwoofer, ported
Low-frequency Transducer
Dual 8" (200 mm) weather resistant, polypropylene cone woofers, rubber surround
Frequency Response (-6 dB)
42 Hz – 165 Hz
Useable Frequency Range (-10 dB)
36 Hz – 205 Hz

Filter 120 Hz low-pass, passive, bypassable

Maximum Output 2

Calculated Peak / Continuous Output 2π (half space) 4π (full space)
124 dB SPL / 118 dB SPL118 dB SPL / 112 dB SPL

Nominal Impedance 8Ω

Power Rating RMS Power Handling
250 W (2 hours IEC)

Recommended Max Amp Power
500 W RMS

Sensitivity
94 dB, 2.83 V, 1 m, half space (2π)

Transformers
Type Custom low distortion laminated core, wide bandwidth design

Taps 70V: 200, 100, 50, 25 W / 100V: 200, 100, 15 W / 8Ω selected by switch

Material Marine grade plywood, ABS, steel grille

Finish Textured black paint

Grille Painted steel

Connectors 4 position barrier strip; 2 in / 2 out

Weight - Net / Shipping 43 lb (19.5 kg) / 55 lb (25 kg)

Hardware (included)

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