?Expanded-design? tuned, ported cabinet made specifically for extended range basses (5 and 6-string models). Utilizes custom Hartke 5" aluminum-cone high-frequency driver plus four Hartke XL 10" aluminum-cone bass drivers. Great as a stand alone cabinet, or stack two 4.5XL cabinets for high volume situations. Frequency response: 30Hz to 12kHz, power handling: 400W, 8?. Weight: 97 lbs, Dimensions: 27"H x 24"W x 18"D.