Model
Sundown Audio U 18 D2
Rating
DIAM
18"
FS(Hz)
31.3
VAS(l)
135.4
QTS
0.33
PWR(W)
3000
SPL(dB)
92.3
IMP(Ohm)
2x2
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)
31.3
Vas(l)
135.4
Qts
0.33
Qms
3.4
Qes
0.37
Bl(Tm)
29.9
Mms(gr)
444
Cms(mm/N)
0.058
Rms(kg/s)
25.69
Le(mH)
2.62
Re(Ohm)
3.8
Sd(sq.mm)
128297
Vd(l)
3.849
X-max(mm)
30
X-mech(mm)
30
General Parameters
Diameter (inch)
18
Max Power(W.)
3000
RMS Power(W.)
1500
Number of Coils
2
Impedance Z-Nom(Ohm)
2
Reference efficiency η0(%)
1.08
Sensitivity(dB) 1-W
92.3
Sensitivity(dB) 2.8-V
95.6
Mounting Information
Speaker Displacement (l)
7.08
Total Diameter (mm)
474
Cutout Diameter (mm)
424
Mounting Depth (mm)
257
Magnet Diameter (mm)
220
Optimum Enclosures
Enclosures
Closed, Vented, BP4, BP6P
