User Guide

File: Impero18CTwoBy18LargeVentedBox1200Watts.bb6
Impero 18C 2x18 Large Vented Design
By Jerry McNutt, Eminence Speaker LLC
1200 Watt design; F3 at 43 Hz. Use a steep high pass at 30 Hz. Use a Divider!
Large 2x18 Sub Box for PA or MI uses. Parallel for 2 ohm; Series for 8 ohm.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square
--Box Parameters--
Vb = 15 cu.ft
V(total) = 16.11 cu.ft
Fb = 35 Hz
QL = 7
F3 = 42.86 Hz
Fill = minimal
--Vents--
No. of Vents = 4
Vent shape = round
Vent ends = one flush
Dv = 6 in
Lv = 8.767 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 = 2
Mounting = Standard
Wiring = Series
Drivers sum coherently = Yes
--Mechanical Parameters--
Fs = 31.48 Hz
Qms = 10.13
Vas = 317 liters [634]
Cms = 0.17 mm/N [0.085]
Mms = 147.6 g [295.1]
Rms = 2.88 kg/s [5.76]
Xmax = 8.13 mm
Xmech = 20.17 mm
P-Dia = 382 mm [540.2]
Sd = 1159 sq.cm [2318]
P-Vd = 0.932 liters [1.863]
--Electrical Parameters--
Qes = 0.35
Re = 3.13 ohms [6.26]
Le = 1.09 mH [2.18]
Z = 4 ohms [8]
BL = 16.1 Tm [32.31]
Pe = 1200 watts [2400]
--Electromech. Parameters--
Qts = 0.34
no = 2.724 % [5.449]
1-W SPL = 96.5 dB [99.51]
2.83-V SPL = 100.6 dB [100.6]
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
138
132
126
120
114
108
102
96
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
139
133
127
121
115
109
103
97
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K