Shallow Mount Design: The Rockford Fosgate Punch P3S shallow
subwoofer is designed and engineered with a more shallow motor assembly, reducing
the overall depth of the woofer and allowing it to fit in smaller locations in
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.
Compression Terminals: The P3SD4-8 features spring post
terminals which accommodate pin connectors, single banana plugs, or bare speaker
wire up to 10 gauge.
Note: The rubber magnet cover may need
removed (or repositioned) to insert pin connectors or banana
CEA-2031 Compliant: Power handling conforms to CEA-2031
industry standards, meaning the subwoofer has the capacity to handle its rated
power under continuous demand, not just for an instant.
VAST Surround: The Vertical Attach Surround Technique (VAST)
increases a speaker's effective radiating cone area without increasing the size
of the basket.
FlexFit Basket: The Flex Fit frame utilizes slots (where
possible) instead of single screw sized holes; allowing slight adjustment of
the speaker when mounted.
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 the ring. The
other four screws are used in these holes to mount the ring and woofer to the
enclosure. The trim ring increases the mounting height of the woofer to approximately
1 inch, and the ring's diameter is approximately 9 inches.
Sealed Box: Rockford recommends a sealed enclosure with an
optimum internal volume of 0.25 cubic feet (from 0.2 to 0.70 cubic feet is
acceptable). Sealed enclosures provide the most control over a woofer, will
handle a lot of power, and provide accurate sonic reproduction, making them
suitable to all types of music.
Ported Box: Rockford recommends a ported enclosure with an
internal volume of 0.75 cubic feet using one 3" diameter x 9" long port;
this yields a tuning frequency of 47.5 Hz. Ported (or vented) enclosures typically
provide better overall efficiency than sealed so they are suitable for use with
smaller amplifiers, giving you more bass output from less power. However, this
efficiency comes at the expense of very low frequency output (below 37 Hz).
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