Bandpass enclosure, Building a bandpass enclosure – Precision Power PC8C2 User Manual
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BANDPASS ENCLOSURE
Building a Bandpass Enclosure:
1.
Using 3/4" thick MDF, cut out all the panels to build a divided
enclosure with internal dimensions of LxWxC1 and C2 as specified for
your woofer (See recommended enclosures for your woofer).
2.
Using the supplied template, trace the appropriate circle and
mounting hole pattern for your PowerClass C2 subwoofer on the baffle
board.
3.
Cut the speaker and port holes from the baffle board with a router,
using a guide or template whenever possible. Use a jig saw only if a
router is not available.
4.
Locate the port material which you are going to use, and cut it to the
appropriate length. When installing the port, make sure you have a
distance of at least one port diameter from the end of the port to the
inside wall of the enclosure. Round over the inside edges of both ends
of the port with a router or file to minimize port noise.
5.
Assemble the enclosure, using wood glue and silicone at all joints to
ensure your that enclosure is sealed properly. Air leaks will affect the
performance of your subwoofer even in ported enclosures. Leave one
panel removable for access to the woofer.
6.
Place the woofer into the hole which you have cut in the baffle to
check the fit.
7.
Run an appropriate length of wire into the enclosure, 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.) Then, line the
ported side of the enclosure with a polyester fiberfill blanket or
fiberglass insulation about 1” thick, and loosely fill the sealed side of
the enclosure half way with polyester fiberfill.
9.
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.
10.
Install the woofer into the enclosure using #8 or larger wood screws.
11.
Attach the removable cover to the enclosure, ensuring that there are
no air leaks.
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
PowerClass C2 subwoofer brings to your audio system.