Not much needs be said about this fantastic tube amp other than it is one of the cleanest yet still tube sounding amps out there. Absolutely an awesome pairing for 6X0 headphones, though it absolutely works well with others. Comes with a set of matched EF184's and also several sets of stock tubes. Price is firm and is lower than historical SW51+'s on here for quick holiday sale. Includes PP & shipping on my end and this is a weighty piece. Thanks for looking!