World Wide Stereo offers the Klipsch Reference S4 Premium In-Ear Noise-Isolating Headphones in Black, model no. 1013730, for $47.98. Coupon code "DNEWSREF" cuts it to $36.84. With free shipping, that's $1 under our March mention and the lowest total price we've seen. (It's also a current low by $3.) These earbuds feature a frequency response of 10Hz to 19kHz, four sizes of ear tips, 3.5mm plug, and more. Deal ends May 5.