User Guide

File: Impero18CSmallVentedBox1200Watts.bb6
Impero 18C Small Vented Design
By Jerry McNutt, Eminence Speaker LLC
1200 Watt design; F3 at 51 Hz. Use a steep high pass at 40 Hz.
Compact Woofer Box for PA or MI uses. Extreme Output. Four Ohm.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters--
Vb = 4 cu.ft
V(total) = 4.63 cu.ft
Fb = 50 Hz
QL = 7
F3 = 50.73 Hz
Fill = minimal
--Vents--
No. of Vents = 2
Vent shape = round
Vent ends = one flush
Dv = 6 in
Lv = 8.715 in
Driver Properties
--Description--
Name: Impero 18C
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: High Power Pro Woofer, 4 ohm
--Configuration--
No. of Drivers = 1
--Mechanical Parameters--
Fs = 31.48 Hz
Qms = 10.13
Vas = 317 liters
Cms = 0.17 mm/N
Mms = 147.6 g
Rms = 2.88 kg/s
Xmax = 8.13 mm
Xmech = 20.17 mm
P-Dia = 382 mm
Sd = 1159 sq.cm
P-Vd = 0.932 liters
--Electrical Parameters--
Qes = 0.35
Re = 3.13 ohms
Le = 1.09 mH
Z = 4 ohms
BL = 16.1 Tm
Pe = 1200 watts
--Electromech. Parameters--
Qts = 0.34
no = 2.724 %
1-W SPL = 96.5 dB
2.83-V SPL = 100.6 dB
Normalized Amplitude Response (dB-SPL/Hz) Eminence Designer
dB
6
0
-6
-12
-18
-24
-30
-36
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Custom Amplitude Response (dB-SPL/Hz at 1 m) with 1200 watts Eminence Designer
dB
135
129
123
117
111
105
99
93
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K
Maximum Acoustic Power (dB-SPL/Hz at 1 m) Eminence Designer
dB
133
127
121
115
109
103
97
91
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K