Thank you so much for your impressions. The clarity/brilliance was my biggest priority during the development, and it elevates the HD 620S over almost all other closed-back headphones. To me, clarity makes music fun to listen to, and in the past that was really hard to come by if you don't want...

Thanks for your confidence, I share it :) Regarding measurements: I was a bit hesitant to directly compare the HD 620S with the HD 600 in a graph because it's an apples-to-oranges comparison with closed vs. open. The new Focal headphones measure quite similar, but to my ears the tuning works...

On the topic of the open 600 series: the HD 660S was upgraded because we saw the opportunity for improvement without compromise to the customer. It's much harder to build though :^( We've seen a lot of love for the HD 660S2, and it handily outsells the HD 650 and 6XX combined. Of course...

It comes down to flexibility for the user. The 150 ohms allow the HD 620S to be driven by dongles, and yet make them much more consistent in sound quality out of higher impedance sources. This is our first serious entry to mass market closed-back headphones, and especially at that price point...

We had zero meetings on the cable entry :smile: Since closed headphones are more likely to be used in a mobile setting, I believe one-sided entry is much more convenient. On the signal side, the receptor has balanced wiring, so you can attach balanced cables as well. In theory the HD 630VB also...

We know that it's a bit confusing at first, but for us the sound quality is the determining factor. We're sure it will become familiar fast ;) For closed headphones, the chassis of the 500 series is a much better fit. It is more lightweight, compact, and has a one-sided cable. The 600 series...

The backside of the transducer is identical, but the coil of the S2 is copper coloured, while the 660S had a blue coil.

Hi, thanks for the kind words and great questions. 1. The minimum phase argument may be attractive for people that really like measurements, but I personally don't care for it because it disagrees so much with experiment/experience. If FR really were so important, you could equalise any artifact...

Hi, thanks for your confidence in our team. I believe we'll address this topic in a later episode, but I'm happy to give some background why it's unfortunately not so trivial for us: 1. Burden of scale: Sennheiser/sonova consumer hearing is many times larger than practically all our competitors...

It will be worth it!

The fast answer is: the driver in the HD 660S and the HD 700 is the same. The long answer: The older KDH 580 developed for the HD 580 and still found in the HD 600 and HD 650 is to this day mainly hand assembled, which is not ideal for some precision processes, even though it's extraordinarily...

I don't know, what does that mean to you? If you look at the color or size, that's the same. The acoustic difference between HD 660S and HD 660S2 have mostly been achieved by significant changes to the transducer, which has a markedly different diaphragm, voice coil and magnet chassis, which are...

The NDH 30 uses the diaphragm of the HD 560S. It's a polymer blend with extraordinary internal dampening, so afterringing after the initial impulse is minimal. At the audiophile team of Sennheiser/Sonova, we have done a multitude of listening tests (also for the HD 660S2) and found that it...

Hi, thanks for the questions. First, regarding discontinuation: In EMEA and America, the IE 300 has been phased out in favor of the IE 200, as we believe the IE 200 is a superior product for most of our customers. As you may know, Asia's IEM market is much larger, so we'll wait a few months to...

Thanks for the question! Let's clarify the terms first: research refers to working on new technologies that "may" end up in products down the road but have a high chance of failure. Development mainly takes existing solutions and modifies them to create a new product. However, even turning small...