178 XL/A Reference Tower  UPDATED 2/22
Model 178 XL/A is a premium  stereo and home theater speaker system. It employs a host of advanced features that include new  wool-carbon, Quiet Cone™ technology coupled with a magnesium Excel ™ 7 "midrange and sophisticated midbass tuning. It's crossover is a minimum phase multi-element design that uses state of the art Mundorf™ capacitors and Perfect Lay™ inductors to optimize performance and integrate all three drive units perfectly. Included also are interior resonance suppressant coatings, and heavily braced multi-composite main assembly. Every attention to detail and sonic performance has been implemented to achieve a speaker system that is truly full range and very responsive  to the speed of music.


System Design3 way floor standing with 3rd order venting 
Woofer     (1) 8” Cast Wool/Carbon with 1.7” long throw voice coil
Midrange/ mid bass      (1) 7” Excel™ with patented voice coil and magnesium cone
Tweeter    1” Dyna silk dome
Crossover150hz, and 1.7 khz. Minimum phase
Freq. Response        32 hz – 20 Khz
Sensitivity        90 db @ 1 W 1 M
Power Min – Max    50 W – 450 W
Impedance       6 ohms
Size, weight      47.7" h x 10"" w x 10" d - . 68 lbs ea.

Available finishes  Oak, Maple and Cherry., Black Ash

Source Technologies , 701 Nutmeg Road N. South Windsor, CT. 06074 ( 860) 918 3088