Pair of very nice, 3-way, full range stereo speakers. I used these as rear-channel speakers in a surround sound system, but they sound good enough for front speakers too. Yamaha calls them bookshelf speakers, but they seem bigger and better than what I would call bookshelf speakers. Black cabinets with grey grills.
Per Google – The Yamaha NS-A635A is a 3-way acoustic suspension bookshelf speaker system, typically featuring an 8-inch woofer, 4.5-inch midrange, and 1-inch tweeter. Designed for home stereo or studio monitoring, these 8-ohm, 140-watt (maximum) speakers offer a 35Hz–20kHz frequency response, a sensitivity of 89dB, and a compact, shielded design, often found in black, measuring approximately 16” x 10.5” x 12”.