Seeing if there's any interest in my 337. Comes with original tubes, box, literature, etc. Also have some Tungsol power & driver tubes that really work nicely with the 337 if interested for an additional cost. Got that tip from HF member Skylab. Roughly 6 months old, maybe 50-60 hours total playtime. SOLD!!! - includes shipping in US only, Paypal gift or add 3%. I have just been informed by a member that this amp is the non-preout version. Apparently DV has added the preout function to their latest offering. At my asking price I will include the Tungsol tubes.