Superlux HD660 Pro 150 Ohm Closed-back Headphone

The Superlux HD660 Pro package is straightforward. In addition to the headphones themselves, all that’s included is a gold-plated screw adapter that allows the mini-jack plug cable to be used on 6.35mm jack sockets.
The name HD660 Pro will be familiar to many headphone fans. But Superlux don’t stop with just the HD660 Pro’s almost identical name. The design of these headphones is reminiscent of those other circumaural, closed classics in terms of the ear cushions, the ear cup arms, the exposed cables, the headband design and the single-sided, permanently-installed supply line. At first glance, the design of the Superlux headphones seems familiar to the observer, and this need not be a bad thing.

FEATURES

• Ultra-wide frequency response
  - The HD660 Pro use dynamically driven drivers with powerful neodymium magnets, which according to the manufacturer cover an audio transmission range from 10 Hz to 30 kHz. This frequency range is wider than the audio range typically audible to humans. It will therefore be exciting to hear to what extent these headphones can reproduce ultra-deep bass easily and how open their sound image comes across in the trebles.
  
  
• Wide, soft and warm
  - The Superlux headphones have a fixed, non-removable cable with a comfortable length of 2.3 metres. This makes the headphones suitable for a variety of studio situations. Whether the HD660 Pro is used by an instrumentalist for monitoring during recording, or the sound mixer is set up in the studio and rolling back and forth with an executive chair … the cable length provides freedom of movement to the headphone preamp.
  
  
• Audio smoothie
  - The first thing I noticed about these headphones was that the sound of was brilliant and detailed. The sound is present and open in the trebles up to the super high frequency range. This benefits not only the subjective signal resolution but also the stereo impression and the depth staggering. At the same time, the trebles are not obtrusive. In the sibilants, however, a certain sharpness here and there cannot be ignored. These headphones are also powerful at the other end of the spectrum. Basses are reproduced right down to the low bass range without being exuberant.

SPECIFICATIONS

• Circumaural design
• Closed-back
• Dynamic
• Drivers: 40 mm
• Neodymium magnets
• Max. SPL (sound pressure level): 92 dB
• Impedance: 150 Ohm
• Frequency response: 10 - 30,000 Hz
• Single-cable configuration
• Cable length: 2 m
• Weight: 323 g
• Includes an adapter to 6.3 mm stereo jack