JBL Professional Control 19CST 8-Inch Ceiling Subwoofers, with Transformer Taps, Sold as Pair,White : Everything Else - Amazon.com
JBL Professional - JBL CONTROL 19CST 8" 200W In-Ceiling 70V/100V Installation Subwoofers, White (MUST BE PURCHASED IN PAIRS) - PSS Audiovisual Equipment
Amazon.com: JBL Professional Control 312CS High-Output 12-Inch In-Ceiling Subwoofer Loudspeaker : Everything Else
JBL Control 19CST In-Ceiling Subwoofer with Transformer (Pair) - Free Shipping!