This JBL Duet Speaker System Pair drops from $79 to $38.48 plus free shipping at World Wide Stereo when you use our exclusive promo code DUETBRAD in the cart. With free shipping this is the lowest price we found by $13. These speakers work with PCs or portable audio devices. They use "Tangential Strain Relief" transducer technology to deliver extra bass and lower distortion and they have a frequency response of 80Hz to 20kHz. Sales tax is charged in most states.