What headphone amp to buy-Sennheiser HD 600?

Tube rolling sounds like a pretty intense undertaking.

Hey if you can tip cows over at night, then tube rolling ought'a be a breeze! No meadow muffins to look out for either!

Because you are talking about a headphone amp that will likely use only a few, smaller tubes, you may be making it seem more complex and expensive than it actually is. Headphone amps are mostly auto-biasing so you don't have to worry about constantly adjusting the bias. With a tube amp it is basically a plug-and-play scenario with swapping the tubes. As Swampwalker indicated, some of the NOS tube prices are as out-of-hand as real estate in Manhattan. But you really don't need to go there to get satisfaction and great results from trying different brands of tubes. Once you choose and amp and are familiar with the tubes it uses, just do some reasearch here and on other Internet forums as to what others with the same amp have preferred. There are a few really excellent sources of new and NOS tubes to consult as well (The Tube Store, Vintage Tube Services, VTV, Upscale Audio, to name a few). You don't have to spend a fortune on NOS tubes - there are current production tubes that arguably have the potential to perform just as well if not better. Anyway, just don't rule it out...on a headphone amp it's no big deal.

Marco

From your description, you're describing the SinglePower headamps. Especially the MPX3 model with the Slam modifications.I've tried it in my main system and it sounds as you describe. Different tubes change the sound instantly.
The 6SN7 and 5687 tubes are a good mix and give you a taste of tone and transparency.

My profound ignorance regarding tubes is becoming increasingly apparent to me. Yikes! This is downright embarrasing! I know nothing about this topic--->NOTHING.

My profound ignorance regarding tubes is becoming increasingly apparent to me.

No call for embarrasment at all. That's pretty much where most of us started. If you've read the responses so far, then at least you know SOMETHING. Besides, with much of the plug-and-play, auto-biasing circuits designed into most headphone amps, preamps, and many power amps, you really don't need to get much beyond Big Bird and Ernie to enjoy what the potential of tubes are in audio gear. Just use the two ears you've got and make your own decisions. Who knows, you may prefer SS...stranger things have happened. Seriously, there's plenty of folks who go that direction. For me tubes, at their best, have an ease and a natural, lifelike presence that SS can only strive for but never quite reaches the same mark. Yet I've heard SS amps I've really enjoyed for what they have to offer that tubes cannot. Or perhaps a hybrid solution that utilizes both tube and SS technology. Go out there and listen. Pick your poison and enjoy the music. Another option is that many of the head amps are available on a short trial period (7-30 days usually) from either manufacturers or dealers. You may be able to get a few and compare in the comfort of your own home. The only drawback there is that the sound may change, either subtley or profoundly, as the circuits burn in with use. Tubes also change after an initial burn-in. So you may be missing out on some aspect of performance without a burn-in period. If you are in a vast metropolis, just find a local dealer who might have some examples and bring your cans and your music. A local audio club may be another option. Or plead here on this forum for other members in your area who may allow you to come listen to their gear. I'd bet you'd find one or two who might be willing, since you are an established member.

Have fun!

Marco

Marco:

Thanks for the advice. There will certainly be a learning curve with this, that's for sure! Duane had me try a tube preamp a little over a year ago on my system that had a B&K ST 140 amp, Paradigm Studio 100 V3's, and the Rel Storm 3. The tube amp was anemic in the bass with that setup, so I returned it. (See footnote) Anyway, I haven't tried tubes since, but will be doing so with these Stax Lamda Pro's, and their associated vacuum tube amp.

FOOTNOTE: It's the ONLY time I can remember Duane not correctly predicting whether I'd like or dislike some audio thing--not a bad track record for Duane, huh? This has been true even for things he didn't personally sell!