Model
Polk Audio DB840
Rating
DIAM
8"
FS(Hz)
42
VAS(l)
15.4
QTS
0.6
PWR(W)
360
SPL(dB)
84.4
IMP(Ohm)
4x1
avb
PROD
Thiele-Small Parameters
Fs(Hz)
42
Vas(l)
15.4
Qts
0.6
Qms
13.4
Qes
0.628
Bl(Tm)
10.1
Mms(gr)
70
Cms(mm/N)
0.205
Rms(kg/s)
1.38
Le(mH)
2.3
Re(Ohm)
3.5
Sd(sq.mm)
23000
Vd(l)
0.138
X-max(mm)
6
X-mech(mm)
0
General Parameters
Diameter (inch)
8
Max Power(W.)
360
RMS Power(W.)
180
Number of Coils
1
Impedance Z-Nom(Ohm)
4
Reference efficiency η0(%)
0.18
Sensitivity(dB) 1-W
84.4
Sensitivity(dB) 2.8-V
88
Mounting Information
Speaker Displacement (l)
0
Total Diameter (mm)
203
Cutout Diameter (mm)
179
Mounting Depth (mm)
100
Magnet Diameter (mm)
0
Optimum Enclosures
Enclosures
Closed, Vented, BP4, BP6
