Model
URAL ULTIMATUM 18
Rating
DIAM
18"
FS(Hz)
25.8
VAS(l)
138.4
QTS
0.4
PWR(W)
8000
SPL(dB)
89.2
IMP(Ohm)
1x2
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)
25.8
Vas(l)
138.4
Qts
0.4
Qms
5.09
Qes
0.434
Bl(Tm)
18
Mms(gr)
519
Cms(mm/N)
0.073
Rms(kg/s)
16.526
Le(mH)
0
Re(Ohm)
1.7
Sd(sq.mm)
115619
Vd(l)
4.625
X-max(mm)
40
X-mech(mm)
0
General Parameters
Diameter (inch)
18
Max Power(W.)
8000
RMS Power(W.)
4000
Number of Coils
2
Impedance Z-Nom(Ohm)
1
Reference efficiency η0(%)
0
Sensitivity(dB) 1-W
89.2
Sensitivity(dB) 2.8-V
0
Mounting Information
Speaker Displacement (l)
0
Total Diameter (mm)
0
Cutout Diameter (mm)
428
Mounting Depth (mm)
324
Magnet Diameter (mm)
0
Optimum Enclosures
Enclosures
BP4, BP6P, Closed, Vented
