Perfect mirror matched pair of classic Mullard (branded Amperex) 12au7/ECC82s with very low noise/microphonics. Purchased on December 8, 2011 from a very reliable source (Vintage Tube Services) - these were one of Andy's "perfect picks". They provide attractive sweet warmth in the midrange with a pleasant, silky top end (not rolled-off). Really nice for a digital-based system. I paid $140 for these (shipped). Offering them for $105. I will cover shipping and paypal. Please contact me at firstname.lastname@example.org if you are interested and/or have questions. These are in perfect shape, I just switched preamps and no longer have a need for 12au7.