The Sound Professionals offers the Audio-Technica Professional Studio Monitor Headphones, model no. ATH-M30x, for $49. Pad your cart over $49.98 (add two Kobiconn connectors for $1.78) to get free shipping. (Select "super saver shipping" at checkout. Not a member? It's free to join.) That's $6 below last month's mention and the lowest total price we could find by $20, excluding padding. They feature 15Hz to 22kHz frequency response, 40mm drivers with neodymium magnets, 96 dB sensitivity, and a collapsible design.