SCAN SPEAK 28W/4878T00 Revelator - Subwoofer
Scan Speak 28W/4878T00 Revelator - Subwoofer
Delivery time 10 days
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SCAN SPEAK 28W/4878T00 Revelator - Subwoofer
The 28W/4878T00 is a very powerful 28 cm subwoofer, with its large 3" voice coil, extreme linear excursion and low resonance frequency it is perfect for reproducing the deepest frequencies. It incorporates a sandwich paper cone with very high rigidity and relatively low weight. The motor system has high-strength copper sleeves to optimise eddy currents and minimise self-induction.
Suggested enclosure alignments:
1.5 cu. ft. sealed enclosure for 3 dB reduction at 48 Hz and 6 dB reduction at 32 Hz.
3.0 cu. ft. with 3" by 13" long vents for 3dB reduction at about 22Hz.
2.75 cu. ft. with 3" by 15" long vents for f3 of 23Hz
2.5 cubic feet with 3" by 17" long vent for 25Hz f3
The sealed box used with a bass booster plate amplifier could be a nice little subwoofer. The port length on vented boxes is quite long. Be sure to leave at least 3" to the rear wall, preferably more.
Specifications:
Paper sandwich cone
Spider with balanced tinsel drivers
3" voice coil, titanium and paper reinforced former
Patented Symmetrical Drive motor
Extreme linear excursion (+/-14 mm)
Rugged, rigid die-cast aluminium chassis
28W/4878T00
Woofer Series
Revelator Series
Woofer Type: Subwoofer
Nominal Diameter: 11
Power (RMS): 200 watts
Power (max.): 500 watts
Impedance (Z): 4 ohms
Sensitivity: 88.2 dB 2.83 V/1 m
Coil Diameter: 3
DC resistance (Re): 3.1 ohms
Moving coil inductance (Le): 0.5 mH
Resonant frequency (Fs): 18 Hz
Mechanical Q (Qms): 5.6
Electromagnetic Q (Qes): 0.32
Total Q (Qts): 0.3
Mass of the diaphragm Inc. air load (Mms): 114.5 g
Suspension mechanical compliance (Cms): 0.68 mm/N
Cone surface area (Sd): 363 cm2
BL product (BL): 11.2 Tm
Equivalent Volume of Compliance (Vas): 4.49 ft.³
Maximum linear excursion (Xmax): 14 mm
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