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SPL10, SPL12 AND SPL15 SUBWOOFERS 

 

CONGRATULATIONS!

  You have chosen a superior product for 

reproducing high "Sound Pressure Levels" in the car.  This precision 
component, when properly installed, is capable of amazing output 
performance.  The SPL10, SPL12 and SPL15 woofers are extremely high 
output speakers with performance made possible through outstanding design 
and exceptional quality in parts and construction. 
 
Should your woofer ever require service or replacement, recording the 
information below for your own records will help protect your investment. 

 
Model Number:___________________________________________________________ 
 
Serial Number: ___________________________________________________________ 
 
Dealer’s Name: __________________________________________________________ 
 
Date of Purchase: ________________________________________________________ 
 
Installation Shop: _________________________________________________________ 
 
Installation Date: _________________________________________________________ 

 

DESIGN FEATURES 

 

Long Excursion Designs -- The SPL woofers use high performance components and the 
New Ultra-Excursion Surround to achieve extra long excursion for high output and deep 
bass.   

Heavy Gauge Steel Baskets provide extra rigidity and damping. 

Silver Powder Coating ensures durability and lasting good looks. 

Ultra-High power handling Voice Coils with Kapton/Epoxy formers increase power 
handling and performance.  Aerospace grade adhesives and materials insure longevity and 
high performance. 

Dual Voice Coil Inputs for increased flexibility in optimizing installations. 

Computer Numerically Controlled (CNC) machined magnet plates and pole piece 
precisely focus the magnetic energy for optimum performance. 

High Emissivity Coatings  on all steel plates improve power handling. 

Large Magnet Structures for powerful, well-controlled output. 

Vented Pole Pieces for greater voice coil cooling. 

Custom-designed High Strength Spiders control the long travel cone assembly. 

11 

Vented (V) 

Sealed 
Bandpass 

Sealed (Cont'd) 

3.0 ft

Good linear 

response, excellent 
all around enclosure.
 

   
 
 
 
 
Vented 

2.0 ft

3

 @ 50 Hz 

(Three 4" x 12.25" 
ports) - High output 
with good low 
frequency extension.  
Good small 
enclosure.
 

  

3.0 ft

3

 @ 40 Hz 

(Three 4" x 13" 
ports) - High output 
with excellent low 
frequency extension.  
Great for Rock 
music or home 
theater applications.
 

 

4.0 ft

3

 @ 30 Hz 

(Three 4" x 18.75" 
ports) - High output 
with low frequency 
extension.  Great for 
Rock music or home 
theater applications.
 

 
Sealed Bandpass 
 

Rear = 3.0 ft

3

 sealed 

Front = 2.2ft

3

 @ 55 

Hz  (Three 4" x 6.75" 
ports) - High output 
with good low 
frequency extension.  
Good for Rock or 
Rap.
 

 

Rear = 1.5 ft

3

sealed 

Front = 2.2 ft

72Hz (Four 4" x 5" 
ports) - Very high 

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