thx jellofund for your input, I have never owned a dac or headphone amp so am not sure how it would sound. How would you describe the tube sound compared to say the EHP amp+dac kit ?
I like my sound clean and hiss/interferance free and detailed and large sound stage these would be used with AKG 550s, sounds like that EHP kit will do wonders but your tube feelings peeked my interest, perhaps it sounds more natural and laid back ?
Sorry for not replying sooner (been a busy couple of days!).
The tube amp I own (Schiit Lyr) is a tube / solid state hybrid which offers some of the advantages of a solid state amp whilst retaining the 'flavour' of the tubes used.
I know people talk about a tube sound but that's a bit of a generalisation imho as I've found that whilst some tubes do sound 'tubey', some others can actually sound quite solid state like. If you want a detailed neutral sound there are tubes that will do that for you, if you prefer warmth and a treble, mid or bass emphasis there'll no doubt be a tube that will fit the bill.
To my ears the differences between a tube and solid state sound are:
Tube
- a tendency to sound slightly warm and instruments have a nice tonality to them
- more laid back and smooth sounding
- a bit more 'analogue' sounding (vinyl vs cd)
- not always the last word in detail and with some tubes the sound can be a but 'muddled'
- a wider soundstage and the sound seems fuller with more 'body' to it
- tube amps can have a high noise floor with some headphones (some hiss or hum can be evident in quiet passages of music or between tracks)
- sound characteristics can change a bit whilst tubes burn in or how warmed up they are so slightly less 'consistency' in the presentation
- tubes can suffer from microphonics which in some cases can mean a ringing sound during listening. Sometimes barely noticeable but when it's bad it can be like a bout of tinnitus!
Solid state
- consistent and dependable presentation
- a more neutral and accurate sound. Perhaps a bit dry and lacking the 'romance' of tubes
- more detailed sounding
- a bit thinner sounding and lacking the fullness of tubes
- a narrower soundstage
- with an amp like the O2 the amp has a 'black' background, so if you crank up the volume when no music is playing there will be no hiss, crackling or distortion
- slightly harsher at higher volumes
I am generalising though and a lot of this is highly subjective (others may disagree with some of these points), so please take with a pinch of salt!