These professional pro audio studio monitors are in great shape and sound amazing. I am just looking to downsize my set up, and don’t need them anymore. Tweeters have been replaced to the mkii version and sound great. These monitors are currently in use with nothing wrong with them. The sub has the spikes and also the rubber pieces to put between the spikes and the floor which are hard to find!! Items are discontinued, but in full working order and sold for $2400 new! Here is a description from Sweetwater. An Integrated Active Monitor/Sub System that's Great for any Room! The Blue Sky Sky System One 2.1 system provides amazingly accurate, full-range monitoring that's integrated between two active bi-amped speakers and a robust, low-distortion powered 200-watt 12" subwoofer. The System One 2.1 system's crossover allows the 100-watt speakers and sub to work seamlessly together, providing incredible sound reproduction. THX pm3 approved for use in THX pm3 certified studios, Blue Sky's Sky System One 2.1 is a great addition to your recording environment, regardless of whether it's a pro studio or a "real world" project room. Blue Sky Sky System One 2.1 System at a Glance Integrated audio Quality bi-amplified satellites Expandable to 5.1 Integrated audio Employing Blue Sky's proprietary computer-optimized crossover, the Sky System One 2.1 delivers seamless full-range audio from the subwoofer to the main monitors with smooth on and off-axis frequency response. In addition, the Sky System One is THX pm3 approved for use in THX pm3 certified studios. Quality bi-amplified satellites Each of the System one 2.1's 100-watt bi-amplified SAT 6.5 MK II satellite speakers employs a 6.5" hemispherical driver and 1" Neodymium tweeter with a dual concentric diaphragm and integral wave guide. Bass management The integral SUB 12 subwoofer features a single long excursion 12" woofer and a 200-Watt, low distortion power amplifier. Expandable to 5.1 By adding three additional...