Harman Kardon Onyx Studio 4 Bluetooth Speaker (Refurb) $80 at Harman Audio
Harman Audio has the certified refurbished Harman Kardon Onyx Studio 4 Wireless Bluetooth Speaker (Black; HKOS4BLKAM) on sale for $79.99 with free shipping. Has built-in mic with Voicelogic, noise/echo cancellation and 8-hour playback time on a single charge.
Bose Bass Module 500 Wireless Subwoofer $399 at Amazon
amazon.com has the Bose Bass Module 500 Wireless Subwoofer for $399 with free shipping. Compatible with Bose Soundbar 500, Bose Soundbar 700, and SoundTouch 300 soundbar Can be paired with the Bose sound bar 500, 700 and SoundTouch 300, 30-foot wireless range
Portable Bluetooth Speakers up to 60% off at Amazon
amazon.com save up to 60% off on Portable Bluetooth Speakers. Shipping is free on orders of $25+ or Prime.