If you have a good memory, you might remember the Sennheiser HD414 best. The lightweight plastic headphone with its distinctive yellow foam pads was produced for many years and copied by several other manufacturers.
In more recent times, it’s probably the 600 series that’s best known. And here the HD660 is the most audiophile – and the best Sennheiser produces in the field below the more expensive 800 series.
The HD660 got a cosmetic and sonic upgrade a few years ago, and now it’s the turn of the Sennheiser HD 660S2. Where we’re promised even better sound.
“Our new Sennheiser HD 660S2 offers listeners exactly what they most wanted from its predecessor. With precision and power and better sensitivity at all frequencies, you’ll hear details you haven’t heard before, especially in the lower frequencies,” said Jermo Koehnke, Sennheiser product manager for audiophile products, in a press release.
Sennheiser says they’ve improved the 42mm driver, including a lighter and better voice coil that improves airflow in the open-back headphones. The resonant frequency has been lowered from 110 Hz in the 660S to 70 Hz in the 660S2. This should provide improved dynamics and better defined bass response.
Sennheiser's best in the 600 series is the safe choice in this class.
The frequency range has been extended to 8 Hz – 41.5 kHz, while the impedance of the headphones has been increased from 150 to 300 ohms. Sensitivity is rated at 104 dB.
The HD660S2 comes with a shorter 1.8m detachable cable with a 6.3mm jack plug and a similar 1.8m balanced cable with a balanced 4.4mm plug.
A 6.3 mm to 3.5 mm adapter is also included, and the headphones come with a soft pouch.
The price is listed at €599, and they’ll hit shelves on February 21.