Disclaimer: The Sennheiser HD660 S was sent to us by the Belgian Sennheiser branch in exchange for this review. Sennheiser is not related to Headfonia in any way.
Sennheiser has been around since like forever and they’re one of the most respected companies in audio. In the past, Sennheiser has positively surprised us with a lot of top quality products but this year the two most important product releases certainly were the closed HD800, called the HD820 and the HD660 S.
We’ve of course featured and reviewed Sennheiser products on multiple occasions and my personal favorite Sennheiser headphones are the HD650, the HD800 and the TOTL HE-1 (Orpheus). In fact the HD650 aka “The King” is one of my all-time favorite headphones tout court. No, the HD650 is not the very best headphone on the market, but it’s one that still and always brings me a lot of musical joy.
In today’s review we’ll be taking a closer look at the HD660 S, their new full sized, open headphone.
What surprised me most when Sennheiser launched this headphone, is the fact that they refer to it as the legacy of the HD650.
“The new HD 660 S is the ideal open, dynamic headphone for the passionate audiophile.”
If you look around on the web about HD660 S information, you’ll no doubt run into Jude’s post on Head-Fi where he shows the HD660 S driver compared to the one of the Sennheiser HD700. In that regard you would be inclined to say the HD660 S is rather related to the HD700 and not the HD600/650 series but I assume that it marketing wise is better to link the newest creation to the successful and iconic HD650. Anyway, you can find the HD660 S’ product page right here: https://en-us.sennheiser.com/headphones-audiophile-high-end-hd-660-s
The Sennheiser marketing department tells us the following: The new model builds on the legacy of the HD 650, surpassing the exceptional performance of its predecessor with a new and improved transducer design that delivers lower harmonic distortion for an even more natural, lifelike audio experience. With a lower impedance of 150 ohms, the HD 660 S offers even greater versatility, allowing listeners to enjoy the headphones’ reference-class fidelity with both stationary and mobile HiRes players.
I first saw and heard the new HD660 S at the Headphone Heaven show in Rotterdam last year, after that premier it of course was present at every other show in the world and so far feedback has been mixed. I’ve talked to people who absolutely love them, while others just aren’t as enthusiastic about them. It basically all comes down to how you like the HD600 and HD650 and what you expect of the new HD660 S. Keep reading.
According to Sennheiser the new HD660 S features a new transducer design, resulting in improved control of the diaphragm movements thanks to a specially manufactured precision stainless steel fabric, which is adapted to the contour of the diaphragm.
The Sennheiser HD660 S also features extremely light aluminum voice coils that ensure the highest impulse fidelity. The HD660 S transducers are carefully selected and paired by hand to ensure consistently narrow (±1 dB) tolerances.
The HD660 S was launched with a special video and unlike you’d expect it doesn’t feature the typical marketing talk. Instead, Sennheiser found a creative way to explain what their newest product is all about. The video also features great audio and I absolutely recommend listening to it with a good set of headphones.
The Box, Accessories & Price
The HD660 S comes delivered in the typical Sennheiser box with cut-out foam. The headphones are beautifully presented as usual and for the price this is a really nice delivery. The box is a bit big though, so it like all the other boxes is in the attic, but if this was to be your only headphone, then I can see you using this box in your office or living room.
The price of the HD660 S is set at $499.95 (plus tax) in the United States while it’s being sold for €499 (incl. VAT) in Europe. For that price you get the nice box, the HD660 S headphone, a removable cable with a 1/4″ (6.35mm) plug, another removable cable with a 4.4mm balanced Pentaconn (5-pin) plug and a 1/8″ (3.5mm) to 1/4″ (6.35mm) adapter cable.
The HD660 S comes in a matt black and anthracite design – a high-end aesthetic that embraces both contemporary style and timeless elegance. You either like or hate the typical Sennheiser design but I think Sennheiser made a wise choice tuning the already existing design.
Design-wise the new Sennheiser HD660 S at a first glance just looks like the HD650 and HD600 headphones but at the same time it looks different enough to easily distinguish it from them. Basically the major differences are in the finish, grill and the driver design.
The Sennheiser HD600 saw the light in 1997 already and the HD650 followed back in 2003. In headphone terms that in theory basically means they’re ancient, but in reality their design is still very up-to-date. With the slight changes Sennheiser gave the HD660 S (basically it’s just the color and a different grill), the design is good for another 20 years, easily.
Sound and a lot more on Page TWO of this article, after the click HERE or by using the jump below