Mid-size 2½-way tower in JBL's High-Definition Imaging line — patented 2410H-2 25 mm Teonex compression driver in the HDI horn waveguide, mated to three 165 mm Advanced Aluminum Matrix cone woofers in a heavily braced cabinet with dual rear-firing flared ports. Crossovers at 900 Hz and 2 kHz set the lower woofer to roll off early so the middle pair extends the midband.