Sundara has arrived. A thorough comparison with the 6XX will be forthcoming in a few weeks. First impressions: Sundara has more sub bass impact, more highs, and an increase in detail across upper bass, mids, and lower treble. Extra detail retrival over the 6XX. "Clean" is first adjective that...

I purchased the Sundara and will be making a comparison between the two. No new amp or dac or cables. Just the 6xx and Sundara in my current rig. Edit: The clear, tubey, midrange of the 6xx can be heard from 20 FEET AWAY in another room. The magic midrange is audible from a distance!

I do not recall asking you for your opinion or approval on the subject. Please prove that all we can currently measure is 100.00% of all that the human mind can hear. If you cannot prove this then your opinion is based upon faith, the belief (not logic), that we can measure all we hear.

I judge by what I hear not what an engineer says. Human hearing consists of two areas above the outer ear approximately the size of half of a large walnut. As such it involves significant cognitive processing. IOW it varies from person to person based upon our brains and individual abilities...

I have the 6XX. Should I get Sundara first or upgrade amp to Topping A90 first for 6XX before buying Sundara?

I have completed 150+ hours of burn in on the 2 week old 6XX and sound has stayed the same since hour 70. Burn in is now completed.

I used a Fosi/Nobsound/Weiling Q9 192kps. Barely midfi but a noticeable upgrade from phone and CD player chipset. Coax and toslink inputs, volume control, USB input also. $69. If exact name doesn't pop up then any $69 dac/amp will do and be similar. Certainly you can do better at $300 with a...

Look for the SONY DVP-SR200P DVD PLAYER DVD/CD player. This is NOT a Bluray player. No toslink optical output. Coax. Many programmable functions that ideally need screen hooked up to video out to navigate menus. Remote can access functions but many need done via visual menu on screen not...

100+ hours of burn-in on 6XX. Amp/Dac is Fosi/Nobsound Q5 192kps Slight but noticeable improvement in midrange detail retrieval from hours 30 to 70. No changes or improvements in SQ from 70 to 100 hours. Senns are opposite of V-shaped FR with curtailed extreme highs and no sub-bass. That...

My preference is that you are on ignore.

I have yet to hear a set of headphones that betters the midrange of my Mirage M3i, Krell, Denon 3520, DAC from 1990. I suppose we all have to start somewhere.

I look forward to your suggestions for a closed can under $500 that is better than the 1540.

No worries I can afford it now. Inflation has averaged 4% yoy since 1980 btw.

Agreed. I can choose one set for only orchestral music that requires a massive soundstage, another for timbre accuracy for close-mic folk, yet another for bass slam, impact, and transient attack for rock and fusion and pop. 3x $1800 for various types of music to get performance that was not...

I am expressing my own insights and repeating no one else.