User Guide

File: Alpha8MedVentedBox.bb6
Alpha8 Med Vented Enclosure
By McJerry, Eminence Speaker LLC
50 Watt Displacement Limit. F3 of 58 Hz; Best used with a high pass filter set to 55 Hz
or higher.
Box Properties
--Description--
Name:
Type: Vented Box
Shape: Prism, square (optimum)
--Box Parameters--
Vb = 0.85 cu.ft
V(total) = 0.887 cu.ft
Fb = 60 Hz
QL = 7
F3 = 58.05 Hz
Fill = minimal
--Vents--
No. of Vents = 1
Vent shape = round
Vent ends = one flush
Dv = 3 in
Lv = 3.475 in
Driver Properties
--Description--
Name: Alpha-8
Type: Standard one-way driver
Company: Eminence Speaker LLC
Comment: Revised OCT 2005
Piston: Paper cone.
Suspension: Cloth surround.
Dust Cap: Solid composition paper dust cap.
Frame: Pressed steel basket.
Voice Coil: 1.5 inch (38.1 mm) copper.
Magnet: 20 oz ferrite magnet.
--Configuration--
No. of Drivers = 1
--Driver Parameters--
Fs = 72.7 Hz
Qms = 4.6
Vas = 17.7 liters
Xmax = 3.2 mm
Sd = 210 sq.cm
Qes = 0.68
Re = 5.3 ohms
Le = 0.44 mH
Z = 8 ohms
Pe = 125 watts
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 50 watts
Eminence Designer
dB
117
111
105
99
93
87
81
75
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
119
113
107
101
95
89
83
77
5 Hz 10 50 100 500 1 K 5 K 10 K 20 K