Marantz Imperial Speakers These are the large Imperial. 12 inch woofer 2 mids 2 tweeters. The mids and Tweeters have various capacitors and filters for a wide range of sound. The woofers have filters and bass coils. The clarity and sound are an audiophile experience and very sought after. The mids have a brilliance knobs as do the tweeters to adjust how present / vibrant they are. They work perfectly. very well insulated , original fill as they were from the factory. The lattice grill/ covers are in excellent condition. All driver function perfectly. all surrounds are great. THESE ARE LARGE CABINETS. NOT A TYPICAL SPEAKER OR CABINET. asking 400 for the set. very reasonable. cash only!!