What Would You Ask Sennheiser’s Axel Grell?

We’re excited to have Sennheiser’s Axel Grell here to answer your questions about all things sound. One of the world’s top headphone engineers, he’s responsible for the acclaimed HD 800, HD 650, Orpheus I, Orpheus II, and many more.
Wondering about past designs? Driver technologies? What got him interested in audio in the first place? Tell us what you want to know!
[UPDATE] Interview is up here https://www.massdrop.com/talk/989/community-interview-axel-grell! Sorry for the delay and we want to give a special thanks to Axel for taking the time during the holidays to answer questions from the community.
What an incredible response from the community! We are currently compiling all questions received prior to last week’s deadline. Our current plan is to send them over to Sennheiser this week with the final interview releasing before Christmas. Thank you for your participation and continued patience!
T̶o̶ ̶s̶u̶b̶m̶i̶t̶ ̶y̶o̶u̶r̶ ̶q̶u̶e̶s̶t̶i̶o̶n̶s̶,̶ ̶c̶o̶m̶m̶e̶n̶t̶ ̶b̶e̶l̶o̶w̶ ̶b̶y̶ ̶1̶1̶:̶5̶9̶ ̶p̶.̶m̶.̶ ̶o̶n̶ ̶F̶r̶i̶d̶a̶y̶,̶ ̶N̶o̶v̶e̶m̶b̶e̶r̶ ̶1̶8̶t̶h̶.̶ ̶T̶h̶e̶n̶ ̶s̶t̶a̶y̶ ̶t̶u̶n̶e̶d̶ ̶f̶o̶r̶ ̶t̶h̶e̶ ̶i̶n̶t̶e̶r̶v̶i̶e̶w̶,̶ ̶t̶o̶ ̶b̶e̶ ̶p̶u̶b̶l̶i̶s̶h̶e̶d̶ ̶t̶h̶e̶ ̶w̶e̶e̶k̶ ̶o̶f̶ ̶N̶o̶v̶e̶m̶b̶e̶r̶ ̶2̶4̶t̶h̶.̶
T̶o̶ ̶s̶u̶b̶m̶i̶t̶ ̶y̶o̶u̶r̶ ̶q̶u̶e̶s̶t̶i̶o̶n̶s̶,̶ ̶c̶o̶m̶m̶e̶n̶t̶ ̶b̶e̶l̶o̶w̶ ̶b̶y̶ ̶1̶1̶:̶5̶9̶ ̶p̶.̶m̶.̶ ̶o̶n̶ ̶W̶e̶d̶n̶e̶s̶d̶a̶y̶,̶ ̶N̶o̶v̶e̶m̶b̶e̶r̶ ̶9̶t̶h̶.̶ ̶T̶h̶e̶n̶ ̶s̶t̶a̶y̶ ̶t̶u̶n̶e̶d̶ ̶f̶o̶r̶ ̶t̶h̶e̶ ̶i̶n̶t̶e̶r̶v̶i̶e̶w̶,̶ ̶t̶o̶ ̶b̶e̶ ̶p̶u̶b̶l̶i̶s̶h̶e̶d̶ ̶t̶h̶e̶ ̶f̶o̶l̶l̶o̶w̶i̶n̶g̶ ̶w̶e̶e̶k̶.̶
Please note that, while we love reading all your questions, Axel will only be able to answer a limited amount at this time.
thumb_upsteve, richardgao, and 29 others

Dec 18, 2019
Can you give me a headphone please
Hey everyone. Interview is up here now: https://www.massdrop.com/talk/989/community-interview-axel-grell
Sorry for the delay on that one and hope everyone enjoyed their holidays.
" with the final interview releasing before Christmas."
How long? >_____>
Today! Sorry for the delay on that one
Dec 16, 2016
Has the interview been released yet?
No, not yet. We are still working on it and it should be out soon. We'll give you an update once it's published.
Nov 28, 2016
Is this still going on, haven't seen any replies so far. Did I just missed out? The big question I wanted to know if Sennheiser is working on new flagships after HD800S?
Hopefully, the price is under $2000
Dec 23, 2016
pls, dying to find out
Nov 21, 2016
A pleasure to speak with you Axel. Will Sennheiser endeavour to engineer wireless in-ear headphones that are also waterproof? I know from a marketing point of view these are all the rage right now, but if they are on the cards, now is the right time! Also, considering that fashion is considered more often in headphone purchases these days, is it possible that Sennheiser could produce a sleek, colourful version of the Momentum 2.0, perhaps with the strength of stainless, and with the colour scheme inclusive of Sony and Beats? Again, this is really from a marketing point of view. Thanks very much for your time!
Nov 17, 2016
are there any plans to release a new flagship after the hd800 not counting the orpheus?
Nov 16, 2016
Tyll Hertsens wrote a glowing review of your HD 202 headphones. Do you have new models coming in the under $100 segment? Your warranty is impressive and nearly unique in the headphone marketplace. Suggest you include a replaceable cord option in this price range, as Monoprice does.
Nov 16, 2016
What are your thoughts on the "Sennheiser veil" that has been the object of many an argument on the internet? Is it a desired effect? Is it an artifact of tuning out something worse? Or is it, as many have claimed, not really there?
Nov 17, 2016
HI . In 2003 I bought the Sennheiser HD 650 when it came out. I was a big fan of Sennheiser. To be honest I simply "hate" my purchase and regret it. Veil sound awful bass even with a proper headphone amplifier. Also the paint on the headband cracked. I discover Grado at that time SR 325is and love the clarity detail fast bass that was not present in my HD 650. But I continue by the years to read reviews about the HD 650 and absolutely don't understand those positive reviews. So one day (last summer) I stop at a dealer place to try again the Sennheiser HD 650 and I immediately notice that it was much lighter. I borrow it for a weekend and as I discover it has nothing in common with my 2003 version. Bass was faster and you know what ??? no more veil sound. Detail clarity appears also. So it seems clearly that this headphone was improved. My understanding is the veil problem is part of the first years of production. So did you saw the criticism about the veil problem ??? and react by correcting those flaws. By now I used my 2003 for video and my recent purchase for music. The color of the drivers on my 2003 are white the new version is grey (kind of stainless steel color). The actual version is a wonderful headphone. I can live with this one alone. Like to hear your explanation. The veil story of the HD 650 need to be clarified now by Sennheiser.
Nov 15, 2016
In theory, part of the reason enthusiast products are important and necessary is to fund development of technology that will inevitably trickle down to less costly consumer products making them better than their predecessors where. There it can and probably does make the manufacturer more money over the long run.
Can you give any examples from your experience of this happening? Are there any specific design points from the legendary HD 580/600/650 series that have found their way into other Sennheiser designs during the decade or two of their lifetime you can speak to?
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Apr 23, 2021