Sennheiser HD 660S2 review: Clear as can be

pocket-lint.com:

Sennheiser has long had a great reputation in the world of audiophile headphones — not necessarily for producing £5,000 headsets that will melt your ears, but rather for its incredible reliability.

The 600 series has had a few variants, and through them all has represented some of the best value in audio, bringing you incredibly crisp and detailed audio for a reasonable price. That price sees a jump for the new HD 660S2, so we've been checking out whether they're worth the upgrade.

4/5

These are a pair of absolutely sumptuous audiophile headphones that are comfortable and sound superb, serving as the perfect gateway into hi-fi audio.However, they're a lot more expensive than other options Sennheiser offers and don't upgrade things hugely on the sound side. While they stand alone excellently, there might be better value to be found elsewhere.

Sennheiser hasn't exactly started off from scratch with the HD 660S2, and that's no surprise. It has a long lineage in the audiophile world, and its headphones have been evolving only slowly on this side of things.

In fact, if you look at the slightly older HD 660S and compare it to this new model, the only really obvious difference is the use of brass accents in a couple of places to make things stand out more.

There are, in fact, plenty of subtle design tweaks inside the earcups, but they're harder to see with the naked eye, and are designed around pretty complicated tweaks to the headphones' audio output.

Still, we think this is a pretty classy and neutral-looking pair of headphones, which matches its sound signature nicely. Of course, this is a completely open-back setup, so sound leakage is a constant and unavoidable side effect of a wide and expansive soundstage.

That means