Coaxial Speaker OWNER'S MANUAL SPL 55
3 
FEATURES 
SPL 55 Midrange / Woofer 
The SPL 55 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 voltage sensitivity and higher 
output 
Aluminum Dome Neodymium Tweeter 
The SPL 55's coaxially mounted 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 
Passive Crossover Network 
• The crossover consists of high quality, 2 pole design for improved 
power handling, lower distortion and better imaging. 
• Acoustic Summation design combines the crossover with the 
speaker's natural roll-off for a steeper slope and increased power 
• Dynamic tweeter protection allows for improved power handling 
and continuous output 
2 Ohm Nominal System Impedance 
The 2 Ohm impedance design of the SPL 55 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 
voltage input 
• More stable, phase coherent load than two 4 Ohm speakers 
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