Soundtube Rs1001i-II-t-Bk one 10 inch polypropylene cone with a butyl rubber surround attached to reinforced baffle. Baffle-mounted flared and tune ports for maximum efficiency and frequency response. Soundtube Rs1001i-II-t-Bk high output and maximize listener’s low frequency experience. Rs1001i-II-T-Bk 150 watt, low insertion loss transformer with an easy access, five position tap switch for 25, 70.7,  100 volt and 4 ohm bypass transformer.  Weatherized components including power coated steel grille, hanging hardware and durable abs enclose for indoor and outdoor applications. Soundtube Rs1001i-II-t-Bk UL listed hanging hardware with high quality cables and integrated speed clamp, self locking wire clamp for fast easy and secure installation.