Martin Logan XTW6-LCR

3-way In-Wall LCR Speaker. Two 6.5” (16.51 cm) cast aluminium basket, black Kevlar with Nomex backer cone bass drivers. One 6.5” (16.51 cm) cast aluminium basket, black Kevlar with Nomex backer cone mid-range driver. FMT High Frequency Transducer 1.27” x 2.4” (3.22cm x 6.09cm) Opening 4.5” x 2.75” (11.43cm x 6.98cm) Diaphragm. Sensitivity: 93 dB, Recommended Amplifier Power: 50-300 watts. Compatible with 4, 6 or 8 ohm rated amplifiers. Required wall opening 16.9 x 68.5cm with depth of 8.99cm.