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 Hz – 165 Hz
36 Hz – 205 Hz |
Filter | 120 Hz low-pass, passive, bypassable |
Maximum Output 2
Calculated Peak / Continuous Output
2pi (half space)
4pi (full space) |
124 dB SPL / 118 dB SPL
118 dB SPL / 112 dB SPL |
Nominal Impedance | 8 ohms |
Power Rating
RMS Power Handling3
Recommended Max Amp Power |
250 W (2 hours IEC)
500 W RMS |
Sensitivity | 94 dB, 2.83 V, 1 m, half space (2pi) |
Transformers |
Type | Custom low distortion laminated core, wide bandwidth design |
Taps | 70V: 200, 100, 50, 25 W / 100V: 200, 100, 15 W / 8 ohms selected by switch |
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 | 4 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) |