Meritline offers the Omicron Tubus G-ViB3 Portable USB Speaker, model no. TUBUS G-ViB3, for $17.99. Coupon code "MLCKD14RNL1" cuts it to $12.99. With free shipping, that's tied with our July mention and the lowest total price we could find by $7. This speaker features a frequency response of 200Hz to 20kHz, USB cable, remote control, and more. Coupon expires after 100 uses or on June 17.