Impedance decides loudness
A 250-ohm pair on a phone sounds quiet and lifeless; the same pair on an interface behaves as designed. A 32-ohm pair works on both. That is a specification, not a fault, and it is why we report impedance whenever a maker publishes it.
Check the socket size before the first session
Six-point-three-five millimeters on most interfaces and pianos; 3.5 mm (0.14 in) on laptops and on some compact interfaces. One adapter solves it, and it is usually in the headphone box.
Speaker-emulated outputs on amplifiers
Some guitar amps voice their headphone output to sound like a miked cabinet; others pass the raw signal, which sounds thin and shrill. The manual states which is fitted, and it explains a great many disappointed first evenings.
One pair, two places
If the same headphones serve a laptop and an interface, low impedance and a supplied adapter are worth more than any specification further down the sheet.
The questions players ask
Do I need a headphone amplifier?
Rarely at this level. A 32-ohm pair is driven properly by a laptop or an interface; the question only arises with high-impedance pairs of 250 ohms and above.
Which adapter do I need?
Most studio headphones terminate in 6.35 mm or ship with an adapter; laptops and some interfaces use 3.5 mm (0.14 in). It costs almost nothing, and it is the one part people discover missing at the wrong moment.
Last reviewed 2026-08-18
