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

Grado RS-1

The mahogany Grado flagship: the house energy with a warmer, lusher, wood-tinged midrange.

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~98 dB / V
Needs an amp?Optionala clean source is enough
SignatureWarm-bright, wood-bodied, lush

Our take

The RS-1 is Grado’s classic wood flagship: the forward, lively signature softened by a warmer, richer midrange the metal and plastic models lack. Still bright and engaging, just more romantic. Easy to drive, and the one many Grado fans settle on.

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.

RS-1 vs SR325?

The RS-1 is warmer and lusher in the mids; the 325 is more aggressive and metallic. Same energy, different character.

Does the RS-1 need an amp?

No: easy to drive; a clean source is all it asks.

If you like the RS-1

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

Warren Labs

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