Precision Power PRO15 - Manual (Page 8)

PORTED ENCLOSURE
6
Building A Ported Enclosure:
1. Build a ported enclosure with internal dimensions of LxWxD as specified
for your woofer (See page 10). Use 1” thick MDF (medium density fiber
board) for the baffle that the Subwoofer mounts in, and 3/4” thick MDF
for the rest of the enclosure. Be sure to use wood glue and silicone to
ensure your enclosure is sealed properly, as air leaks will affect the
performance of your subwoofer.
2. Using the supplied template, trace the appropriate circle and mounting
hole pattern for your
PrecisionPower subwoofer on the baffle board. Be
sure to offset the woofer to one side to leave room for the port in the
baffle. (See Diagram)
3. Cut the speaker hole out of the baffle board with a router. Use a guide
or template whenever possible for a clean, accurate job; use a jig saw
only if a router is not available. Drill out the mounting holes for T-nuts
with a 7/32” drill bit.
4. Locate the port material which you are going to use. Trace the pattern
of the appropriate hole needed for the port, then cut the hole out. When
installing the port, make sure you have a distance of at least one port
diameter from the end of the port to the wall inside the box. Also, round
over the inside edge of both ends of the port to cut down on port noise.
5. Place the woofer into the hole which you have cut in the baffle to check
the fit. Make sure that the T-nut holes line up.
6. Install the 10-32 T-nuts (supplied) into the 7/32” holes from the
backside of the mounting board.
7. Run an appropriate length of wire into the box, leaving enough to
comfortably install the wires to the terminals on the woofer before
placing the speaker into its mounting hole. Use a terminal cup whenever
possible.
8. Vacuum out any wood shavings and dust from the inside of the
enclosure. (Failure to do so may void your warranty.) Line the enclosure
with a polyester fiberfill blanket or fiberglass insulation about 1” thick.
9. Apply the included foam gasket to the speaker to ensure a sealed fit.
Be sure that the mounting holes line up on the gasket.
10. Connect the wires to the woofer observing the proper polarity,
positive and negative terminals. Strip away the insulation of
the wire about a 1/4" and install the wires into the terminal posts.
11. Install the woofer into the box using the 10-32 bolts (supplied).
12. Once the box is complete, it's time to connect the speaker wire coming
from the subwoofer enclosure to your amplifier. Check that you use the
proper wire for consistent polarity, positive and negative.
(Refer to amplifier owner’s manual.)
13. Finally, sit back and enjoy the incredible enhancement your new
PrecisionPower subwoofer brings to your audio system.
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