The III's have dual 7' woofers, while the IV's have dual 10" woofers. The IV's therefore have deeper bass and higher peak loudness. The midrange drivers and tweeter are identical.
Both are 6 ft. tall, the III's being reasonably thin, and IV's being pretty darn big. The III's weigh 80 lbs. each, while the IV's weigh 180 lbs. each.
I owned III's for five years.
Both are 6 ft. tall, the III's being reasonably thin, and IV's being pretty darn big. The III's weigh 80 lbs. each, while the IV's weigh 180 lbs. each.
I owned III's for five years.