BuyDig offers the 2nd-generation Beyerdynamic T1 Audiophile Stereo Over-Ear Headphones bundled with the Sennheiser HDVA600 Headphone Amplifier for $2,598. Coupon code "c1176147523" cuts that to $1,299. With free shipping, that's $1,299 under the lowest price we could find for these items sold separately elsewhere. The semi-open headphones feature a 5Hz to 50kHz frequency response, 600-ohm impedance, velour ear cushions, and braided, detachable cable. The amp features a frequency response of 0.3Hz to 100kHz, ALPS quadruple potentiometer, and a 5-stage variable gain factor.