Cerwin-Vega stroker Pro 15 User Manual

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MOBILE AUDIO

USA: Cerwin-Vega!, Inc. • 9340 De Soto Ave. • Chatsworth, CA • 91311 ©2005 Cerwin-Vega

Phone: [phone] • Fax: [phone] • Cerwin-Vega! is a division of the Stanton Group

Cerwin-Vega! reserves the right to make changes to product specifications and design at any time

CERWIN-VEGA

STROKER

TEXT: VANCE DICKASON &

ERIC HOLDAWAY

PHOTOS: COURTESY OF MANUFACTURER

PRO 15

Since 1954,

Cerwin Vega, one of the
oldest speaker companies around,
has had a major reputation for building speakers
that allowed everyone to be “loud and proud.”
Therefore, it’s no surprise that Cerwin-Vega has
introduced one of the most outrageous car sub­woofers I have r

15. At 68.3 lbs., they have the “Where’s the Beef?”
award in the bag. Even more impressive than its
physical size is this pr

The Stroker Pro cast aluminum frame acts as

both a giant heatsink (an old but good trick) and a

eviewed to date, the Stroker Pro

oduct’s technology.

A FRONT-RUNNER FOR

SOUND QUALITY AND SPL

highly effective Faraday

shield or shorting ring (a new

patent-pending trick). The cut­away drawing (Fig. 1) shows that this woofer not
only has two separate magnets (actually, the lower
magnet is two magnets stacked together, so tech­nically three magnets), but also two gaps, a tech­nology known as Multiple Magnet Air Gap (MMAG).
Because of the physical layout of the MMAG motor
format, CV could mount the lower magnet system
to the back of the frame, like a normal woofer
turn the frame’s inside diameter upward to form a
shorting ring.

, but

MORE

THAN A ONE

NOTE WONDER —

In addition to attenuating nasty eddy currents
produced by the woofer motor and lowering distor­tion, a large shorting ring also reduces motor tem­perature by decreasing inductive heating. Figure 2
reveals what an outstanding thermal pathway this
frame makes with the upturned section directly
adjacent to the naked voice coil. The Stroker has
four other thermal pathways: two in the spider
mounting area and two at the rear of the motor.
There are two sets of vents integrated into the
lower

-spider mounting shelf (this woofer has two
mounting shelves for three spiders). A 1/8” gap
goes around nearly the entire perimeter of the

-