BuyDig offers the Beyerdynamic DT-770 i Closed Headphones for $99.99. Coupon code "YADIG5" drops it to $94.99. With free shipping, that's the lowest price we could find by $105, although we saw them for $10 less on Black Friday weekend. These studio headphones feature 16-ohm impedance and a 5Hz to 35kHz frequency response.