On-ear open-back · 32 Ω · Reference tier

Grado SR325

The metal-bodied Prestige Grado: the house sound with more punch and more treble bite.

Frequency responseRaw · L/R averaged
Head Acoustics HMS II.32005 to 2014Open backs read bass-light on this fixture.
-12-60+6+1220501002005001k2k5k10k20k
Normalized 0 dB @ 1 kHzOne unit, one seating
TypeOn-ear open-back
Impedance32 Ωeasy to drive
Sensitivity~99 dB / V
Needs an amp?Nosource quality over power
SignatureBright, punchy, metal-bodied

Our take

The SR325 pushes the Grado signature harder: strong midbass punch and an aggressive, detailed treble in an aluminum housing. Exciting and forward, occasionally sharp, a treble dip via EQ keeps the energy without the glare. Still trivially easy to drive.

Measured on a Head Acoustics HMS II.3 artificial head — raw response, left/right averaged, normalized to 0 dB at 1 kHz. From the Sonic Temple Archive(2008–2014, one unit per model). Honest limits: seating variance runs ±0.4 dB in the mids to ±3.9 dB above 12 kHz, and open headphones read bass-light on this fixture — don’t read fine treble detail as settled. How we measure →

New to this?How to read this graphWhat impedance meansDo you need an amp?

Common questions

Straight answers — the same ones our measurements support.

Is the SR325 bright?

Yes: a forward, energetic top that can get sharp. EQ tames it while keeping the punch.

Does the SR325 need an amp?

No, it is easy to drive; source quality matters more than power.

If you like the SR325

Close on the graph, or a deliberate step in one direction.

Warren Labs

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