Matched pair of vintage, audiophile, Infinity Reference Standard RS 2.5 speakers. Some cosmetic wear and tear but still sound great. Foam around the midranges and tweeters stiff but should be easy to replace if desired. New Watkins 12 inch dual voice coil woofers installed a few years ago. Speakers use electromagnetic induction tweeter (EMIT) and midrange (EMIM) and give clear, crisp sound. Nominal impedance is 4 ohms. Recommended power 100 to 300 watts/channel. Original owner. Purchased in 1980 for about $2K.