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© 2008 Directed Electronics. All rights reserved.
HCCA122 & 124 Vented SPL Enclosure Only.
Note: These SPL enclosures are for dB drag vehicles only!!!!! If music is played through
this type of enclosure, the woofer will be damaged! Listed here are starting points,
experimentation is the key to success. Use extreme caution, the woofers can be
damaged with frequencies below the tuning frequency.
c
b
—Box Parts—
Box Shape – Square Prism
1 Top, 1 Bottom
depth (c) = 18.89 in. (480 mm)
width (b) = 18 in. (457 mm)
thickness = 1 in. (25.4 mm)
1 Front, 1 Back
height (a) = 16 in. (406 mm)
width (d) = 16 in. (406 mm)
thickness = 1 in. (25.4 mm)
2 Sides
height (a) = 16 in. (406 mm)
depth (c) = 18.89 in. (480 mm)
thickness = 1 in. (25.4 mm)
— Driver Mounting —
Mounting: Front
Top &
Bottom
a
d
Front
& Back
c
Sides
A
B
C
— External Dimensions —
A = 18 in. (457 mm)
B = 18 in. (457 mm)
C = 18.89 in. (480 mm)
— Internal Dimensions —
A = 16 in. (406 mm)
B = 16 in. (406 mm)
C = 16.89 in. (429 mm)
— Wall Thickness —
Front = 1 in. (25.4 mm)
Sides = 1 in. (25.4 mm)
h
e
h
g
— Vent Parts —
1 Top, 1 Bottom
width (e) = 7.5 in. (191 mm)
length (h) = 9.37 in. (238 mm)
thickness = 0.75 in. (19 mm)
2 Sides
height (g) = 6 in. (152 mm)
length (h) = 9.37 in. (238 mm)
thickness = 0.75 in. (19 mm)
Box Properties
— Description —
Type: Vented Box
Shape: Prism, Square
— Box Parameters —
Vb = 2 cu.ft
V(total) = 2.502 cu.ft
Fb = 57 Hz
QL = 5.256
F3 = 42.9 Hz
Fill = none
— Vents —
No. of Vents = 1
Vent shape = rectangle
Vent ends = one flush
Hv = 6 in. (152 mm)
Wv = 6 in. (152 mm)
Lv = 9.37 in. (238 mm)