Pro Sound Comes Home JBL's engineers developed this """"no compromise"""" design: For the HTi series of in wall loudspeakers, pure titanium tweeters, aluminum alloy woofers and sophisticated cross over networks. Maximum Recommended Amplifier Power: 100 Sensitivity (2.83V @ 1m): 88 Frequency Response (10dB): 38Hz 20kHz High Frequency Driver: 1"""" Pure titanium dome with EOS waveguide and swivel mount Low Frequency Driver: 6 1/2"""" Polymer coated aluminum cone with rubber surround Plate Size (W x H): 8 1/2"""" x 11"""" Mounting Cutout Size (W x H): 7 1/8"""" x 9 11/16"""" Mounting Depth: 3 7/8""""Authorized Retailer:dynadirect.com is an authorized online retailer of JBL home audio products. Please be aware that if you purchase JBL products from an unauthorized retailer: JBL is not obligated to cover repairs under the warranty policy. JBL may be unable to assist you if problems arise. You may be purchasing counterfeit JBL products.Order Notes:Due to the size and weight of this item, it can only be shipped via Ground. Air delivery is not available.