4 x 15 ", 300W into 2 Ohms, used with a 32W Acoustic head.
The spectrum is trs wide frequency drives. I expected a sound "boomy" on my first test but not at all. it is well inflated mdiums without being aggressive, down a well in the low and no shortage of acute (unless you are a fan of tweeters background ...)
Used for 2 years, it is perfect. Trs heavy (close to 100kg!) But good wheels can move it without worry, and the sound ... Nothing wrong, it's perfect!