Speaker System OWNER'S MANUAL
3 
FEATURES 
LOCATION 
AND 
MOUNTING 
SPL 4 Midrange / Woofer 
The SPL 4 is an excellent performer with a combination of high 
sensitivity, solid bass and smooth response throughout the audible 
range. 
•Lightweight Cone designed for good rigidity and high sensitivity 
•2 Ohm Voice Coil for increased output 
SPL 1 Aluminum Dome Neodymium Tweeter 
The SPL 1 tweeter is a high performance 1” Neodymium tweeter 
designed to deliver outstanding high frequency reproduction 
• Black Aluminum 1" dome for improved power handling and 
linear response 
• Ferrofluid-immersed Voice Coil enhances heat dissipation 
• Vented Aluminum Voice Coil Former for superb heat dissipation 
and high power handling 
SPL 4X Passive Crossover Network 
The SPL 4X crossover consists of high quality, multi-element 
components with a two position tweeter level control. This allows 
tailoring high frequency output to the installation and individual 
preferences. 
• 24 dB/octave Acoustic Summation Crossover Slopes 
• Variable tweeter control for added flexibility 
• Dynamic tweeter protection allows for improved power handling 
and continuous output 
• Ultra-low DCR Inductors for minimal signal loss (High power 
Ferrite in woofer path) 
2 Ohm Nominal System Impedance 
The 2 Ohm impedance design of the SPL 40 system provides an overall 
3 dB increase in output compared to a 4 Ohm design.  
• Effectively a doubling of Sound Pressure Level -- with the same 
amplifier voltage output 
• More stable, phase coherent load than two 4 Ohm speakers 
40.pub 
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