3-way double woofer and 2-way bi-polar speaker. Sweep tested all drivers ok. **Audio Pro Modified** x-over design rev 4. Hi frequency 2nd order filter. Mid range corrected - more natural voice. Added dual density cab damping, dacron, and felt blanket. Cherry walnut cabinets nice, but some scuffs, scrapes, etc. Black knit grills. 38" tall, 15" deep, 9.5" wide.