Owner's Manual

5
Enclosures
Vented Enclosures
NOTE: Vb is the internal volume, before any speaker and/or port dis-
placement is added. All external dimensions were based on the use of
3/4” (1.90cm) materials.
NOTE: When using enclosures other than recommended, call Technical Support
for correct application.
Optimum Vented (Ported) Enclosure Sizes
Vented Enclosures 8” 10” 12”
Total Internal Volume cu. ft. (Li-
ter)
1.10 (31.15) 1.45 (41.06) 2.45 (69.38)
Woofer Displacement cu. ft. (Liter) 0.05 (1.41) 0.1 (2.83) 0.12 (3.4)
Port Displacement cu. ft. (Liter) .03 (.85) 0.1 (2.83) 0.33 (9.35)
V
b
- Net Internal Volume cu. ft. (Liter) 1.0 (28.3) 1.25 (35.4) 2.0 (56.63)
F
B
- Tuning Frequency (Hz) 45 40 35
F
3
- 3dB Point (Hz) 34.7 39 36
H - Height - inch (cm) 12 (30.48) 15.0 (38.1) 16.0 (40.64)
W - Width - inch (cm) 16 (40.64) 15.0 (38.1) 20.0 (50.8)
D - Depth - inch (cm) 14 (35.56) 15.25 (38.74) 17.5 (44.45)
P - Port Diameter and Length - inch
(cm)
3 x 9.4
(7.62 x 23.9)
3 x 9.5
(7.62 x 24.13)
4 x 14
(10.16 x 35.56)
NOTE: The port shown can be placed on any face of the enclosure as long as the
port ends are not obstructed.
NOTE: When using vented enclosures, for maximum reliability and power han-
dling ensure, that a subsonic or “infrasonic” filter is used so that only usable low
frequency signal is sent to the subwoofer.
Infinite Baffle
An Infinite Baffle enclosure design represents an application where the compli-
ance of the air volume within the enclosure is greater than the compliance on the
speaker’s suspension (Vas). An infrasonic filter is required for reliable performance.
Infinite Baffle 8” 10” 12”
F
3
- 3dB Point (Hz) 42.7 69.4 43.3
Vas - cu. ft. (Liter) 0.63
(17.9)
1.77
(50.2)
3.80
(107.7)
Qtc - Enclosure Damping 0.66 0.43 0.54
IMPORTANT: A subsonic or “infrasonic” filter at or above the resonant
frequency (Fs) of the speaker is required.
NOTE: Infinite baffle installations will result in lower speaker pow-
er handling when compared to fully enclosed applications such as
sealed or vented enclosures.
Wiring Configurations
By varying the wiring configuration of your speakers you can create an impedance
load to match your system. Altering the wiring configurations gives a range of
options for impedance loads. Series, Parallel, or Series-Parallel wiring configura-
tions are different techniques for wiring speakers that provide different loads. Se-
ries configuration is a string method where speakers are wired end to end. Parallel
configuration uses two or more speakers wired across common terminals. Series-
Parallel configuration combines both techniques. Choose the wiring diagram that
corresponds to the number of woofers and the impedance of your amplifier.
Subwoofer Crossovers
There are two operational types of crossovers, passive and active. Passive cross-
overs (coils or inductors) are placed on the speaker leads between the amplifier
and speaker. An active crossover is an electronic filter that separates the audio
signal fed to different amplifiers. For optimum subwoofer performance, we recom-
mend using an active 80-100Hz low-pass crossover at 12dB/octave.
3/4" MDF
H
W
D
P
Series Wiring
(1) 2 ohm DVC Speaker = 4 ohm Load
2Ω
4Ω
2Ω
Parallel Wiring
(1) 4 ohm DVC Speaker = 2 ohm Load
4Ω
2Ω
4Ω
Parallel Wiring
(2) 4 ohm DVC Speaker = 1 ohm Load
4Ω
1Ω
4Ω
4Ω
4Ω
Parallel/Series Wiring
(2) 2 ohm DVC Speaker = 1 ohm Load
2Ω
2Ω
2Ω
2Ω
2Ω
Storage or
Cavity Area
Baffle Board
Subwoofer