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Shallow Mount Design: The Rockford Fosgate Punch P3SD series
shallow subwoofers are designed and engineered with a more shallow motor assembly
which reduces the overall depth of the woofer, allowing it to fit in smaller
locations in your vehicle. The P3SD4-12 used an anodized aluminum cone and
Santoprene surround. An anodized aluminum voice coil former and spider venting
help keep the subwoofer cool.
Dual Voice Coils: This woofer features dual 4-ohm voice coils
for wiring flexibility. When the voice coils are wired in parallel, the woofer
presents a 2-ohm load. When the voice coils are wired in series, the woofer presents
an 8-ohm load.
CEA-2031 Compliant: Power handling on the P3SD4-12 subwoofer
conforms to CEA-2031 industry standards. This means the subwoofer has the capacity
to handle power under continuous demand, not instantaneous power handling, that
over time, can damage voice coils.
FlexFit Basket: The Flex Fit frame utilizes slots (where
possible) instead of single screw sized holes; allowing slight adjustment of
the speaker when mounted.
VAST Surround: The Vertical Attach Surround Technique (VAST)
increases a speaker's effective radiating cone area without increasing the size
of the basket.
Anodized Aluminum Voice Coil Former: Aluminum voice coil
formers offer superior heat dissipation over other commonly used materials. The
hard-anodized finish increases the former strength. These two factors combine to
improve the overall power handling characteristics of the subwoofer.
Spring Post Assemblies: The woofer features custom
insulated/isolated compression input terminals with attached flexible,
16-gauge stitched tinsel lead wires that can withstand extreme duty cycles,
fatigue and high current. The heavy-duty spring posts will accept pin
connectors, single banana plugs, and bare wire up to 10-gauge.
Trim Ring: For added cosmetic appeal the woofer comes with
an aluminum trim ring that mounts over the flange of the woofer. When using the
trim ring, the woofer is first mounted with four screws, then the ring is mounted
over the woofer, aligning the final four holes of the woofer with ring. The other
four screws are used in these holes to mount the ring and woofer to the enclosure.
The trim ring increases the top-mounting height of the woofer to approximately
one inch and the ring diameter is 13-3/8 inches.
Break-In Period: Due to the design of the Rockford Fosgate
P3 Shallow subwoofer, a 24 to 48 hour break-in period is required to allow for
maximum excursion and low frequency extension. The shallow woofer suspension is
intentionally designed to optimize once the internal components are exercised
under normal music listening conditions.
Sealed Box Volume: The sealed box size range recommended by
Rockford Fosgate is 0.60 to 1.20 cubic feet. Within this range, the ideal recommended
size is 1.0 cubic feet, resulting in a 3dB down point of 40 Hz and a Qtc of 1.01.
Vented Box Volume: The vented box size recommended by Rockford
Fosgate is 1.25 cubic feet. One 4" diameter x 12" long port should be used,
resulting in a tuning frequency of 42.5 Hz and a 3dB down point of 34 Hz.