Building An Enclosure; Calculating Volumes; Subwoofer Crossovers - Rockford Fosgate Power T110D2 Installation & Operating Manual

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:
Box Volume =
(cubic feet)
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.
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.
FEATURES - Power DVC T1
• Aluminum Parabolic Cone
• High Excursion Thermoplastic Rubber Surround
• 3" Anodized Aluminum Voice Coil Former
Model - Power DVC
Nominal Impedance (ohms)
Voice Coil Diameter-inch (mm)
FS (Hz)
QTS
VAS-cu.ft. (liter)
Xmax-inch (mm)
SPL (dB @ 1w/1m)
Power Handling (RMS)
Power Handling (Max)
Mounting Dia.-inch (mm)
Mounting Depth-inch (mm)
Speaker Dis.-cu. ft. (liter)
Sealed Box Vol.-cu. ft. (liter)
Vented Box Vol.-cu. ft. (liter)
Port Diameter & Length (in.)
Port Diameter & Length (cm)
Height" x Width" x Depth"
T110D2
2 (2)
3 (72.2)
32
0.574
0.67 (19)
0.55 (14)
82.0
600
1200
9-5/16 (236.54) 9-5/16 (236.54)
6.4 (162.56)
0.065 (1.84)
0.75 (21.24)
1.5 (42.47)
(1) 4 x 11
(1) 10.16 x 27.94 (1) 10.16 x 27.94
1728 cu. in./cu. ft.
S
• Dual Cast Aluminum Basket with Spider Venting
• 102, 124 and 220oz. Double Stacked Motor
Structures
• Optimized for Sealed and Vented Enclosures
T110D4 T112D2
4 (2) 2
3 (72.2) 3 (72.2)
34
0.624
0.67 (19) 1.44 (41)
0.55 (14) 0.55 (14)
82.0
600
1200
10-13/16 (274.64)
6.4 (162.56) 6.74 (171.2)
0.065 (1.84) 0.08 (2.26)
0.75 (21.24) 1.25 (35.39)
1.5 (42.47) 1.75 (49.55)
(1) 4 x 11 (1) 4 x 9
(1) 10.16 x 22.86
B E
UILDING AN NCLOSURE
C
UBWOOFER ROSSOVERS
S
PECIFICATIONS
T112D4
(2) 4
3 (72.2)
30 32
0.462 0.502
1.44 (41)
0.55 (14)
85.7 85.7
600 600
1200 1200
10-13/16 (274.64)
6.74 (171.2)
0.08 (2.26)
1.25 (35.39)
1.75 (49.55)
(1) 4 x 9
(1) 10.16 x 22.86
Number of ports noted in ( )
(2)
7