Tender Specification: XS-4 passive 18“ Highpower-Subwoofer Highpower 18“-long excursion subwoofer in a special acoustic design enclosure with precise and powerful low frequency reproduction. Rear loaded double chamber resonator. High quality multi layer multiply wooden enclosure covered with a robust black 2-component lacquer. Foam covered, ball impact resistant front grill and optional transport cover at the front. Transport board with 4 wheels at the back and 2 side handles. M 20 thread at the top for pole mount. Optionally available in all RAL-colours. electro-acoustical features: acoustic design: passive subwoofer, rear loaded double chamber resonator system components: 1x 18“ long excursion power rating (nominal): 800 W power rating (peak): 1200 W nominal SPL : 99 dB maximum SPL: 132 dB frequency range: 35 Hz to 500 Hz nominal impedance: 8 ohms features: enclosure: multiply birch plywood protection grill: ball impact-resistant protective steel grill, powder-coated connections: 4x Neutrik NL4 speakon standard colours: textured finish black frontal design: acoustic foam dimensions (W x H x D): approx. 59 x 60 x 68 cm weight: approx. 38 kg wheels: detachable transport board with 4 wheels handles: 2 handles pole mount: M 20, for speaker pole optional features: optional colours: all RAL-colours weather resistance: polyurethane coating, membrane impregnation make: Fohhn Audio AG type: XS-4 passive