Model
Sundown Audio U 18 D4
Rating
DIAM
18"
FS(Hz)
31.4
VAS(l)
135.4
QTS
0.38
PWR(W)
3000
SPL(dB)
91.8
IMP(Ohm)
4x2
avb
PROD
Some parameters have a deviation from parameters associated with them. Please, look at the exclamation marks to get advice.
Thiele-Small Parameters
Fs(Hz)
31.4
Vas(l)
135.4
Qts
0.376
Qms
3.5
Qes
0.42
Bl(Tm)
35.3
Mms(gr)
441
Cms(mm/N)
0.06
Rms(kg/s)
24.5
Le(mH)
3.97
Re(Ohm)
6
Sd(sq.mm)
126141
Vd(l)
0
X-max(mm)
0
X-mech(mm)
0
General Parameters
Diameter (inch)
18
Max Power(W.)
3000
RMS Power(W.)
1500
Number of Coils
2
Impedance Z-Nom(Ohm)
4
Reference efficiency η0(%)
0.96
Sensitivity(dB) 1-W
91.8
Sensitivity(dB) 2.8-V
93.1
Mounting Information
Speaker Displacement (l)
0
Total Diameter (mm)
474
Cutout Diameter (mm)
424
Mounting Depth (mm)
257
Magnet Diameter (mm)
0
Optimum Enclosures
Enclosures
Closed, Vented, BP4, BP6P
