BuyDig via eBay offers the Audio-Technica ATH-M50x Professional Studio Monitor Headphones in Black or White bundled with the FiiO A3 Headphone Amplifier in Silver, model no. E11K, for $129.99 with free shipping. That's $10 under our February mention and the lowest total price we've seen for this bundle. (It's also $48 under the best deal we could find for these items purchased separately elsewhere.) The headphones feature a 15Hz to 28kHz frequency response, 45mm neodymium drivers, swiveling earcups, and three detachable cables. The amplifier is designed to improve sound in headphones rated between 16 to 150 ohms and features an all-aluminum body and chassis.