Sennheiser HD 560S vs Sennheiser HD 600

If the SHP9500 is the gateway, the HD 560S is the upgrade you grow into. Sennheiser tuned it to be neutral and honest, so you hear the recording instead of a flavored version of it. Detail retrieval is excellent, and the soundstage is wide enough that some reviewers rate it above pricier Sennheisers.

It is light, the velour pads are plush, and clamp force is gentle, so it disappears over a workday. At 120 ohms it is happy from a decent dongle or PC jack, though a small amp gives it more authority.

Like most reference open-backs, the bass stays polite. It is accurate rather than punchy, and the tuning can feel slightly clinical until your ears settle in (a touch of EQ wakes it right up). For honest sound that does everything well under $200, it is very hard to beat.

The HD 600 has been the headphone other headphones get measured against for over twenty years, and it earns it. The star is the midrange: vocals, strings, and acoustic instruments sound natural and true to the source in a way that still holds up against modern flagships.

This is the one pick that genuinely needs an amp. At 300 ohms and modest sensitivity, a phone leaves it flat and quiet, but give it real power and it snaps to life. It is light, and once the famous Sennheiser clamp loosens it gets very comfortable.

Expect the house sound: bass is present but rolls off at the very bottom, and the soundstage is intimate rather than cavernous. Nearly every part is replaceable, so people keep these for a decade. Often found well below list price, it is a long-term keeper.