Polk Audio EX652a User Manual

POLK AUDIO

5601 METRO DRIVE

BALTIMORE, MARYLAND 21215

[phone]

POLK AUDIO EUROPE LTD.

TYTTENHANGER HOUSE

COURSERS ROAD

ST. ALBANS AL4 OPG

GREAT BRITAIN

TEL: [phone]

POLK AUDIO GERMANY

UNTERTUERKHEIMER STR. 24

D - 66117 SAARBRUECKEN

GERMANY

TEL: [phone]

http://www.polkaudio.com

"Polk Audio" and "The Speaker Specialists" are

trademarks of Britannia Investment Corporation used

under license by Polk Audio Incorporated.

EX SERIES

Polk Audio
EX Series II Owner's Manual

32

POLK AUDIO – A HISTORY OF EXCELLENCE

Polk Audio was founded in 1972 by Matthew Polk and George Klopfer. Their dream was to
make speakers with the performance of the world’s best speakers, at a reasonable price. They
did so by applying scientific principles to speaker design and by concentrating solely on the
speaker business. That is how Polk became known as “The Speaker Specialists.”

Today Polk Audio is still headquartered in Baltimore, Maryland and is one of the world’s
largest manufacturers of home and car loudspeakers. Polk’s research has yielded over 20
patents for advances in loudspeaker performance and value. Polk speakers have earned the
praise of audio experts the world over, as well as dozens of awards for innovative, high­quality design. Polk Audio speakers are sold in over 50 countries and in audio/video
specialist retail locations throughout the US.

Founders Matthew Polk and George Klopfer still work alongside 300 dedicated Polk team
members to bring you the best speakers you can buy.

THE STORY OF DYNAMIC BALANCE

®

Your new Polk speakers employ Dynamic Balance, a technology which came out of a joint
research project between Polk Audio and Johns Hopkins University. This laser imaging
research enables us to view the entire vibrating surface of a driver or tweeter, allowing us to
observe the resonances which develop on speaker cones as they move. These resonances are
the root cause of frequency response distortions.

As an x-ray enables a physician to discover the root cause of a symptom and thereby
prescribe the right treatment for a cure, this laser imaging technique allows Polk engineers
to find the right combination of high-tech materials, geometry and construction techniques
to tune out the offending resonances. The benefit of Dynamic Balance is the dramatic
improvement in the sound quality of our speakers, which every listener can appreciate. You
no longer have to choose between excellent bass and smooth, clear midrange and highs.
Now you can have it all, thanks to Dynamic Balance technology.

A WORD FROM MATTHEW POLK

Dear Music Lover,

Thank you for purchasing Polk Audio speakers. Designing and building speakers is more
than just a business for the people of Polk Audio – it is our passion. We are all dedicated to
your complete satisfaction and delight.

Your new Polk speakers include the latest loudspeaker technology to assure outstanding
performance and unmatched quality. Please take a moment to read through this manual
for information on getting the greatest enjoyment from these fine instruments.

We make a wide variety of automotive loudspeakers, including factory replacements,
coaxes, component systems, tweeters and subwoofers. If you would like more information
on building the Polk car system of your dreams, consult your Polk Audio dealer or call our
Customer Service Department at 1-800-377-POLK (7655) from 9am to 5pm, Eastern Time,
Monday through Friday.

Sincerely,

Matthew S. Polk

Co-founder and Chairman

ATTACH YOUR RECEIPT

HERE AND FILE FOR

FUTURE REFERENCE

X

54

BUILDING YOUR OWN SUBWOOFER ENCLOSURE

Since the subwoofer enclosure is so critical to getting the best performance from your EX
subs, you should ask yourself the following questions:

1. Do I really enjoy working with my hands?

2. Do I have good woodworking and mechanical skills?

3. Do I have or have access to woodworking and electrical tools?

4. Do I have a solid understanding about musical reproduction in an automobile?

• If you answered "NO" to any of the above questions, we recommend you choose one of
these two possible alternatives. First, you may choose a pre-built subwoofer enclosure
available from companies like Obcon, ADD and Q-Logic or an enclosure kit from
BassLine and other manufacturers. The second alternative is to have your authorized
Polk Audio dealer design and build a woofer box for you.

• If you answered "YES" to all of the above, let’s review some basics before you begin.

Effective planning will help ensure that your system performs the way that you want it
to. Every car is different, and everyone has slightly different musical tastes. You need to
make informed decisions before you begin to build your system. Polk EX subwoofers
are designed to work in a wide variety of enclosures, and each enclosure design has a
unique list of pros and cons. The following is the basic information about the most
popular automotive subwoofer enclosures.

It is not possible to provide all of the information for enclosure options here. This
manual will give you enough information to build a great sounding enclosure. If you
are interested in a greater choice of enclosure designs, your Polk EX Series II dealer
has extensive experience designing woofer boxes and will be more than happy to work
with you. If you prefer, you can call our Customer Service Department from 9AM to
5PM, Monday through Friday, Eastern Time at [phone] or email us at
[e-mail].

EX SERIES II SUBWOOFER FEATURES:

The EX Series II subwoofers use the latest technologies and highest quality materials to
provide you with the best bass response and greatest reliability possible. The EX Series II
subwoofers have been optimized to give skull-collapsing performance from a wide variety of
enclosure types. Some of their design elements are:

• 1mm thick mineral filled polymer composite cones – ultra stiff and strong to
withstand the enormous pressures generated inside subwoofer enclosures without cone
breakup and distortion.

• Injection molded polypropylene dustcap – prevents distortion due to the build up of air
pressure behind the cap.

• Rubber surrounds – provide a much tighter and more durable air seal behind the
cone than foam, paper or cloth surrounds, for deep, tight, quick bass. In addition,
rubber surrounds do not dry rot like foam surrounds.

• Four layer, 2" voice coil (EX10 and EX12 only) – handles heat generated when your
amp is really cranking.

• Vented pole piece – lets air circulate over the voice coil to keep it cool and in control
even when the bass is really thumping.