7
B
UILDING AN
E
NCLOSURE
To work properly, the walls of the enclosure must be rigid and not flex when subjected to the high pressures
generated by the speaker's operation. For optimum performance, we recommend using 3/4" MDF (Medium Density
Fiberboard) and internal bracing.The enclosure should be glued together and secured with nails or screws.
CALCULATING VOLUME
Calculating volume is merely a matter of measuring the dimensions in inches and using the formula:
S
UBWOOFER
C
ROSSOVERS
There are two operational types of crossovers, passive and active. Passive crossovers (coils or inductors)
are placed on the speaker leads between the amplifier and speaker. An active crossover is an electronic
filter which separates the audio signal fed to different amplifiers. For optimum subwoofer performance, we
recommend using an active 80-100Hz low-pass crossover at 12dB/octave.
Box Volume =
Height" x Width" x Depth"
(cubic feet)
1728 cu. in./cu. ft.
If two facing sides are of uneven length, add them together and divide by two to take the average. Using this number
will give you the volume without the necessity of calculating the box in sections and adding the sections together.The
thickness of the baffle material reduces the internal volume so this must be subtracted from the outside dimensions
to determine the internal volume.The speaker itself also reduces the internal volume.The amount of air displaced by
each model is listed on the specification sheet and should also be subtracted from the gross volume calculation.
Model - Power DVC
T110D2
T110D4
T112D2
T112D4
Nominal Impedance (ohms)
2
(2)
4
(2)
2
(2)
4
(2)
Voice Coil Diameter-inch (mm)
3 (72.2)
3 (72.2)
3 (72.2)
3 (72.2)
FS (Hz)
32
34
30
32
QTS
0.574
0.624
0.462
0.502
VAS-cu.ft. (liter)
0.67 (19)
0.67 (19)
1.44 (41)
1.44 (41)
Xmax-inch (mm)
0.55 (14)
0.55 (14)
0.55 (14)
0.55 (14)
SPL (dB @ 1w/1m)
82.0
82.0
85.7
85.7
Power Handling (RMS)
600
600
600
600
Power Handling (Max)
1200
1200
1200
1200
Mounting Dia.-inch (mm)
9-5/16 (236.54)
9-5/16 (236.54)
10-13/16 (274.64)
10-13/16 (274.64)
Mounting Depth-inch (mm)
6.4 (162.56)
6.4 (162.56)
6.74 (171.2)
6.74 (171.2)
Speaker Dis.-cu. ft. (liter)
0.065 (1.84)
0.065 (1.84)
0.08 (2.26)
0.08 (2.26)
Sealed Box Vol.-cu. ft. (liter)
0.75 (21.24)
0.75 (21.24)
1.25 (35.39)
1.25 (35.39)
Vented Box Vol.-cu. ft. (liter)
1.5 (42.47)
1.5 (42.47)
1.75 (49.55)
1.75 (49.55)
Port Diameter & Length (in.)
(1) 4 x 11
(1) 4 x 11
(1) 4 x 9
(1) 4 x 9
Port Diameter & Length (cm)
(1) 10.16 x 27.94
(1) 10.16 x 27.94
(1) 10.16 x 22.86
(1) 10.16 x 22.86
Number of ports noted in ( )
S
PECIFICATIONS
FEATURES - Power DVC T1
•
Aluminum Parabolic Cone
•
High Excursion Thermoplastic Rubber Surround
•
3" Anodized Aluminum Voice Coil Former
•
Dual Cast Aluminum Basket with Spider Venting
•
102, 124 and 220oz. Double Stacked Motor
Structures
•
Optimized for Sealed and Vented Enclosures
