S U B W O O F E R S
Thank you for purchasing this Cadence subwoofer. It was designed and engineered in the United States of America
by a team of the most dedicated engineers whose one goal is to provide you, our customer, with the absolute
best subwoofer you can buy.
Each subwooofer is painstakingly hand-assembled by a team of experts and then thoroughly tested.
This piece of precision audio equipment is designed to provide you with years of bass performance when installed
in the proper enclosure. We strongly recommend that you allow your authorized Cadence dealer to design and
build your woofer enclosure so that you maximize your speaker’s potential.
On the reverse side of this page are guidelines for the construction
of both sealed and vented enclosures. Both types of enclosures
will work well with your woofer. The vented enclosure will deliver
a louder output, but requires a slightly larger enclosure.
If you decide to build your own enclosure, we strongly recommend
that you “measure twice” and “cut once” – that is, always double-
check your measurements.
Enclosures should be constructed from MDF or particle board of
at least 3/4” thickness. Be sure to glue and screw or staple your
enclosure joints tightly – your box must be air-tight to operate
properly and efficiently. Use Elmer’s brand or similar “carpenters’
glue.” Internal braces are also recommended.
The Specifications page describes three sizes of enclosure for
vented and sealed applications, but many others are possible.
Become knowledgeable on the subject and you will be able to
design other types of enclosures by plugging in the parameters
supplied in this guide. Feel free to call our technical assistance
line for custom box designs, or download the free box building
software from:
http://www.linearteam.dk/default.aspx/?pageid=winisd
Don’t forget to leave a donation.
BUILDING YOUR OWN ENCLOSURE
VOICE COIL WIRING DIAGRAMS
ABOUT THE SPECIFICATIONS
All FS measurements are for NEW woofers. You can expect the
Fs to drop by at least 5Hz after a few hours of play.
Enclosure measurements INCLUDE woofer and port displacement.
F-3 down points are calculated by computer which models the F-
3 in free air response. Typically you can expect the actual 3dB
down point to be at least 10Hz lower for actual in-car response.
SPL efficiency measurements listed are done in our labs and are
not to be considered an indicator of a woofer’s loudness once
installed in an enclosure and powered by an amplifier.
Specifications and measurements in this document are subject
to change without notice.
Copyright © 2006 Cadence Sound, Inc.
PARALLEL WIRING
IMPEDANCE AT
AMPLIFIER =
1 OHM
SERIES WIRING
IMPEDANCE AT
AMPLIFIER =
4 OHM
IMPEDANCE AT
AMPLIFIER =
1 OHM
TWO 4 OHM WOOFERS
CONNECTED IN PARALLEL
IMPEDANCE AT
AMPLIFIER =
2 OHM
DUAL 2 OHM
VOICE COILS
DUAL 2 OHM
VOICE COILS
TWO 2 OHM WOOFERS
CONNECTED IN PARALLEL
TWO WOOFERS WITH VOICE COILS IN SERIES,
CONNECTED IN PARALLEL
IMPEDANCE AT
AMPLIFIER =
2 OHMS
DUAL 2 OHM
VOICE COILS
DUAL 2 OHM
VOICE COILS
