neo_2009
Prominent Member
It seems SI will have a new 18" Subwoofer.
Specs:
4" diameter copper voice coil
27 mm Xmax
220 mm OD advanced FEM optimized triple stacked magnet structure
234 mm OD nomex spider with bolt-down ring
Flat sewn-on leads
Large 4 AWG speaker terminals
One piece inverted dust cap
High-roll rubber surround
Cast basket
Magnet ID shorting ring
Cutout: 16.7"
Mounting depth: 9.5"
Weight: 50.0 lbs
T/S parameters:
Re: 3.9 Ohms
Fs: 18.7 Hz
Qes: 0.65
Qms: 2.19
Qts: 0.50
Le: 1.52 mH
Sd: 121736.4 mm^2 (18869 in^2)
Vas: 270 L
BL: 19.9
Mms: 561.42 g
Cms: 128.2 uM/N
SPL; 86.1 dB 1W/1M
SPL: 89.1 dB 2.83V/1M
Xmax: 27 mm
Xmech: 50 mm
RMS Power: 1200 w
Enclosure recommendations:
Sealed: 4 ft^3
Vented: 6 to 20 ft^3
Price will be under $270.
Source: SI DS4-18" subwoofer with 4" coil
Specs:
4" diameter copper voice coil
27 mm Xmax
220 mm OD advanced FEM optimized triple stacked magnet structure
234 mm OD nomex spider with bolt-down ring
Flat sewn-on leads
Large 4 AWG speaker terminals
One piece inverted dust cap
High-roll rubber surround
Cast basket
Magnet ID shorting ring
Cutout: 16.7"
Mounting depth: 9.5"
Weight: 50.0 lbs
T/S parameters:
Re: 3.9 Ohms
Fs: 18.7 Hz
Qes: 0.65
Qms: 2.19
Qts: 0.50
Le: 1.52 mH
Sd: 121736.4 mm^2 (18869 in^2)
Vas: 270 L
BL: 19.9
Mms: 561.42 g
Cms: 128.2 uM/N
SPL; 86.1 dB 1W/1M
SPL: 89.1 dB 2.83V/1M
Xmax: 27 mm
Xmech: 50 mm
RMS Power: 1200 w
Enclosure recommendations:
Sealed: 4 ft^3
Vented: 6 to 20 ft^3
Price will be under $270.
Source: SI DS4-18" subwoofer with 4" coil