Sennheiser HD 560S vs Sennheiser HD 600

The HD 560S is what the SHP9500 owner buys next. Sennheiser tuned it close to a diffuse-field reference rather than to a shop demo, so vocals sit where the engineer put them and a bad mix sounds bad. That is the point of it.

The practical argument is the drive spec. At 120 ohms and 110 dB it plays loudly and stays controlled from a phone dongle or a PC jack, which is unusual for a headphone tuned this honestly. A small amp tightens the bass and adds headroom, but the headphone is not waiting on one to be usable.

Bass extends flatter than the Philips does, but it is deliberately unexaggerated, so anyone coming from a consumer tuning will read it as thin for the first week. Treble is lifted slightly around the presence region, which reads as clarity on good recordings and as glare on harsh ones. The build is almost entirely plastic and the headband creaks when you adjust it, though the velour pads and the low clamp make it the most wearable of the three over a full workday.

The HD 600 has been the headphone other headphones get measured against since 1997, and the reason is narrow and real: its midrange is close to neutral across the range where voices and acoustic instruments live, with none of the scooping or presence spikes that flatter a demo and annoy you later.

This is the one pick that will not work without an amp. At 300 ohms and 97 dB, a phone runs out of voltage well before the headphone runs out of dynamics, so it sounds quiet, soft and flat straight from a laptop. Fed properly it snaps into focus. Plan for a desktop amp or a powerful dongle at the same time as the headphone.

The compromises are the other side of the same tuning. Sub-bass rolls off, so this is not the headphone for bass-led electronic music. The stage is intimate rather than cavernous, which some listeners prefer and others find closed-in. Clamp force out of the box is strong enough that the first fortnight is uncomfortable on a wide head. Against that, Sennheiser still sells pads, headband cushions, grilles, yokes and cables individually, which is why decade-old pairs stay in service instead of being replaced.