Philips SHP9600

Yes, the SHP9600 uses an open-back design that gives music a more spacious presentation. That design also leaks sound and lets outside noise in, so it is better for quiet rooms than public transport.

The SHP9600 is generally specified with 50 mm neodymium drivers and a 32 ohm impedance. The 50 mm driver figure is more commonly documented for this model than the 43 mm figure sometimes used in catalogue listings.

Their 32 ohm impedance makes them relatively easy to drive from a laptop, phone dongle, or ordinary audio player. A dedicated amplifier can still change volume headroom or sound character, but it is not normally required just to make them audible.

The headphones use a wired connection and are supplied with a 3.5 mm plug plus a 6.3 mm adapter for larger headphone amplifiers. Philips lists the 32 ohm impedance and adapter in its [SHP9600 specifications](https://www.philips.co.nz/c-p/SHP9600_00/over-ear-headphones).