Not every pair of Bluetooth headphones is suitable for everyone. Some sound great, others sit better in the ear when jogging. Some models shine with super-long battery life, others as a headset in the home office. You can find your personal test winner with the help of our database...

With the HD 660S2, Sennheiser has not only succeeded in creating a good successor to the first HD 660, but also a worthy heir to the legendary HD 600. With its balanced, precise sound and high-quality housing, the headphones are convincing across the board. So if you are looking for high-end headphones for a wide range of applications, the HD 660S2 is a strong candidate.

With its HD series, Sennheiser has held a special position in the not-so-small headphone market for 30 years. The HD660S2 continues this tradition in an impressive way.

With the HD 660S2, Sennheiser has succeeded in creating a worthy successor to an already outstanding pair of hi-fi headphones. In terms of sound, the new 660s grab you and your music tighter and captivate you with their crisper low frequency range. But it never overdoes it, always sounding harmonious and offering one 'aha' moment after another at the upper end of the frequency spectrum...

These headphones speak one language above all: sound! Everything about them is geared towards the optimal reproduction of music. Every detail becomes "visible", every playing error is ruthlessly revealed. Add to this the enormous joy of playing, which always brings a smile to my face when I feed the listener jazz, funk or fusion. Bad mood? No chance!

Sennheiser pays well for the small sound improvements of the HD 660S2. The recommended retail price rises from 500 to 600 euros. Sennheiser justifies this with the more expensive transducers and the higher reject rate due to stricter quality controls. The old HD 660S, which is now being sold at the street price of 400 euros, is to disappear from the portfolio in future...