This set contains a Polk Audio center channel, a 100W Sony Subwoofer, and 2 Boston Acoustics satellite speakers. The center channel and subwoofer are in good condition other than some slight scratches and dust. They’ve been in storage for awhile. The Boston Acoustics speakers have damaged foam around the speaker itself, but im not sure how that effects the sound. Im including them for basically free because if no one wants them, ill just throw them away. The center channel is very high quality as is the Sony SA-WM250 powered Subwoofer. Here is the company description of the subwoofer. The compact SA-WM250 features a built-in 100-watt amplifier and an 8" long-throw woofer for solid, punchy lows. A phase switch and crossover control let you easily match the SA-WM250's output to your other speakers. And the black wood-grain finish gives the sub a classy look. Sound good? You bet. Details: video-shielded 100-watt amp 8" long-throw woofer frequency response 28-200 Hz continuously variable 50-200 Hz low-pass crossover speaker-level inputs & outputs line-level input phase switch volume control black wood-grain finish 11-3/8"W x 14"H x 15-1/4"D