B&W Bowers & Wilkins 686 S2 If you want to listen to pure sound, the Bowers & Wilkins 686 S2 is for you. The tweeter of this bookshelf speaker is built into a gel-filled cavity. As a result, you do not suffer from vibrations or resonances in the sound. Despite the compact size, you listen to a solid bass because of the woofer and bass reflex port. With the built-in bracket, you can easily mount the speakers to the wall (if desired). The speaker set is in near mint condition, and will be supplied with high quality speaker cable from Correct. Please see the photos for further details of the lot. Specifications: Speaker sensitivity 85 dB Impedance 8 Ω Frequency range 54 - 50,000 Hz Speaker woofer diameter 130 mm Speaker tweeter diameter 25 mm Depth 22.9 cm Width 16 cm Height 31.5 cm