One way of looking at this question is to rephrase it:
"Are Amps With Swappable Parts Better Than Amps in an Impenetrable Box?"
I have spent time with a Singlepower Tube Amp (@blessingx's) in my own home fed by my Benchmark DAC that
softened and sweetened the HD600 but didn't seem to fully extend. (Still nice.)
I have also spent time with a Woo 6SE Tube Amp (@shipsupt's) in my own home fed by my Benchmark DAC that
HARDLY altered the HD600
or my Grados even with different tube combos. (Would be HARD pressed to A/B blind out of a line-up.) So close to the DAC1 headphone-out, why bother? (My opinion only.
)
Have also spent time with the 300-ohm HD600 out of a McIntosh 2105 amp and still want this combo for myself...why???
(The Benchmark makes it easier for me to tell how much
a tube or SS amp is doing to the DAC-section analog line-out because the DAC1 is supposed to have a "neutral, solid state" headphone-out amp with a well-known/measured, neutral/bright signature.)
Recently swapped out capacitors in my Super 7 tube amp and it DID make a difference in a VERY significant way (to me). As much as changing tube combos.
So...part-swapping and messing around with different parts is for some people and
not for others?
But, aren't swapping out
headphones and amps and sources and music/recordings/mastering editions different ways of swapping out "parts" too?
This is why the original question gets a little sticky:
Are there differences in
Output Transformers (if the tube amp uses them)?
Are there differences in
Capacitors (if the Tube Amp or Solid State Amp uses them)?
Are there differences in
Tubes? (If you buy a Sylvania light bulb made in 1950 and one made today do they look different when plugged in? Or two of the "same" 1950's light bulbs purchased from different Ebay sellers?)
Are there differences between Solid State Amps that use
MOSFETS or JFETS vs. those that don't?
Are there differences in amp circuits using
feedback or not?
Are there differences in Solid State amps that use
"discrete parts" vs. opamps?
Are there differences in
methodology when limiting DC from the amp outputs?
Are there differences in
Power Supplies to the amp sections?
What if I have a
hybrid of Tube Gain and SS Output? Do I have advantages of both types of amplifiers?
What if I have a Grado RS-1 (low Ohm) vs. a Sennheiser HD650 (high Ohm)?
Is a
high-impedance output better than a low-impedance output? What if I have treble-happy, 300-ohm HD800?
What if my DAC outputs
2V vs. a DAC that outputs
6V to the amp?
What if I have
hearing loss due to age (normally affecting high frequencies such as 14kHz-20kHz)?
What if I
hate room reflections -with speakers and my space- that muddy the sound and the struggle to hear detail
so I have been checking out headphones?
What if I
hate treble peaks and resonances in my phones that feel like
daggers in my ears and make me keep my music down to the point that I
can't feel/hear enough bass?
What if I have had a lot of
caffeine and can handle loads of treble when I get off work vs. coming home
exhausted and needing to relax?
What if I listen to harsh/brittle recordings?
What if
MY PHONES are NOT FLAT + HAVE RESONANCES in certain areas and also react in different ways to all of the different amp choices/parts above?
What if my preferences for
bass, mids, or treble change?
What if my
music/recording preferences change?
What if I learn to hear more stuff because I can't stop reading Head-Fi and paying attention to stuff? (Dammit.
)
Okay- there is no way that you can fit that in the thread title, I agree.
But
I might have liked someone to post the above questions in this kind of thread 3 years ago because now I think that <all> of these questions need to be answered by an amp designer (and sometimes a modder or DIY'er or amp/headphone buyer).
Yes, some changes will get you "warmer" and some will get you "colder". "
MARCO"..........."POLO"!!!!!
Who was it that said, "if it measures the same but SOUNDS DIFFERENT- you must be measuring the wrong things"?
I think our "similar-but-different" ears interacting with our "similar-but-different" brains and "definitely different" preferences/lifestage can make this a journey of
trial-and-error and "
fun in the hunt".