Review on Sennheiser HD 660 S: Ultimate Hi-Res Open Back Headphone for Audiophiles by Faun Su ᠌

Name: Sennheiser HD 660 S: Ultimate Hi-Res Open Back Headphone for Audiophiles
Item: Sennheiser HD 660 S: Ultimate Hi-Res Open Back Headphone for Audiophiles
Rating: 4

August 25, 2022

I am satisfied with everything, both price and quality, I advise you to buy.

Well, the last. Headphones are still "dark". The detail in the upper case is excellent, but the upper case itself is somewhat tidied up. I would like a little more emphasis on it. But in me, apparently, the habit of my old AKG K701 speaks, and if the HD 660S were the same, there would be no need to talk about any neutrality and honesty.
Now as for the path and gain.
Headphones are serious, so it makes sense to invest in the path. HD 660S drivers are quite capable of showing what is happening behind them, you have a DAC - Amp bundle. Therefore, in order not to spoil the impressions of the model, I do not recommend you connect it to the built-in PC sound card, player or phone. The dry numbers of the passport characteristics indicate that this can be done, but the sound will not be the same at all. Becomes "soapy".
Summary:
If you want headphones that are honest and have a neutral character in order to look for flaws in recordings and engage in their deep analysis - headphones are for you.
If you want emotionality, look for something else. I would recommend Audeze LCD2C.
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Pros

Headphones look strict, stylish and expensive. Made excellent. Nothing creaks, does not dangle, they feel securely in the hands. It seems that they can serve for a very, very long time. They disassemble almost completely without tools. Easy to repair and maintain. Spare parts are readily available and are available in a whole bunch of stores. Moreover, these are not Chinese counterparts, but original parts. Very good. They sit perfectly on the head. The range of adjustments is enough, the ear pads are comfortable. Of the shortcomings of ergonomics, only excessive pressure of the rim on the top of the head can be noted. But they say it goes away with time. You just need to wait until the headphones are a little "carried".

Cons

Sound. He's good, but inconsistent. For 8 or even 9 years, I got used to my old AKG K701, which, to be objective, has a rise in the frequency response in the upper mids and the very top itself, due to which their sound delivery can be called emotional and bright. Although, of course, to a large extent not natural. The Sennheiser HD 600S is the complete opposite. I'll start with the pros: 1) The headphones have excellent timbre balance. Instruments, voice, etc. sound very natural. The sound has a physicality that the 701s don't have. Compared to the 660S, the 701s seem to have everything below the middle cut off. There is intelligibility, but there is no that same physicality. 2) They are not demanding to gain. AKG in this regard is much more whimsical. 3) Headphones are extremely detailed and informative. 4) Can play with energy, focus and pressure. 5) Headphones do a great job with such a thing as imaging. You perfectly feel in what place of the stage this or that instrument is located. In games, this works like a compass, you can clearly imagine where exactly they will attack you from now. And now about the cons and features. Scene. It is practically absent, which is why in some compositions, due to a very "warm" middle, it becomes difficult to isolate some details of the phonogram. They are there, but you need to listen to them, because there is not enough air and space between the sounds. Innings. She is dry and neutral. Many tracks from this sound insipid and mean. In addition, the headphones immediately show you which recording is bad and which is good. And now we are not talking about mp3 vs Lossless, in 660S you will immediately hear the difference between these formats. It's about how the record was mixed in the studio. If the sound engineer didn't notice somewhere and forgot to clean up, for example, the bass, it immediately becomes obvious and it becomes hard to listen to poorly produced music. This is both a minus (not all music sounds pleasant), and a plus (you hear what is included in the recording, no more and no less).