Lehmann seemed to be an amp brand that nailed Sennheiser HD800 sound and tuning.
I have an XS3, and have used the headphone output to drive āgoodā headphones.
The headphone driving capability of the present lineup of Naim integrateds is good!
When compared against (much) higher quality (heavier/higher price points etc) headphone amps; held up very well and even preferred with some headwear (eg Focal clear) and specific music genresā¦
If I know where to listen/what to listen for, I can find areas that the much heavier dedicated headphone amps can pull away from the XS3ās inbuilt āclass Aā headphone amplifier.
If I was critically listening, using my best DAC, and fast A/B switching with matched volume level etc, I might even consistently place it 3rd place (out of 3) when litening to orchestral music.
Given just such a setup, and āfast A/B switchingā isnāt really convenient; I typically fell back to using the XS3 headphone jackā¦
(even though it was harder to reach than two BIGGER, BETTER headphone amps sitting on my desk in front of me)
The convenience of the XS3 being on (always), warmed up and āready to goā, probably nets it a better sound, for short listening sessions, than powering up the ānicer headphone ampsā and using them for less than two hoursā¦
It is true that better headphone amps exist, vut the quality of the XS3 headphone amplifier is VASTLY BETTER than most headphone jacks on home hifi amps for many many decadesā¦
Iād happily forgo a better amp, as, in most cases, better earpads would make a more practical upgrade, as an easy exampleā¦
(funds into a cable or DAC might be more practical)
The Lehmann is probably a superior amp, noticeable with the Sennheiser 800 series headphones.
I was in a similar camp with nice headwear, and I chose to use the XS3 for a few reasons- one being the Burson Conductor would make the Focal Clear clip at volume levels much lower than the XS3 would drive them with NO clippingā¦ (better usable volume range)ā¦
I like the sound from the XS3, and have just readded it (as a power amp) to a bedroom surround setup, the qualifier being I get the headphone amplifier built into the XS3 as well
Given I have three or more dedicated headphone amps or amp/DACs that could easily be installed in the bedroom, from higher pricepoints and specification than the XS3; and I choose the Naim integrated amps headphone socket is āpretty tellingā.
It is certainly good enough, and holds its own very well against good headphone amps.
Those Sennheiser HD800S, certainly can reveal differences in setups, and might show up some obvious changes with large scale orchestral recordingsā¦
otherwise, Iād expect a slight āstage dimensionsā reduction, perhaps less stage depth and a smidge off the sidesā¦
if rows of instruments still layer well, and/or they are āclose enoughā with regular music that its a hard pick, Iād go with whichever is naturally an easy listenā¦
for me, the XS3 headphone amp section, whilst I seriously thought Iād NEVER use it; has proven to be a real asset, and one I enjoy.
Can be beat for serious coin outlay, and many wouldnāt notice any differences at all, even with orchestral on yhe Sennheiser HD800Sā¦
for the op:
if you power down your headamps, but not the XS3, Iād encourage to stick with the XS3ā¦
but, āyesā the Lehmann part is probably a nice/special match up with those top tier Sennheisers.