Beoplay H95 vs Beoplay H9i: which needs more amplifier?

The Bang & Olufsen Beoplay H95 is 12Ω at 101.5 dB/mW; the Bang & Olufsen Beoplay H9i is 24Ω at 95.0 dB/mW. This page covers what they ask of an amplifier, not how they sound.

The Beoplay H9i needs 6.5 dB more than the Beoplay H95 to reach the same loudness — 3.2 mW against 0.71 mW.

The numbers that decide it

SpecificationBeoplay H95Beoplay H9i
Impedance12 Ω24 Ω
Sensitivity101.5 dB/mW95.0 dB/mW
Sensitivity (voltage)120.7 dB/V111.2 dB/V
Power for 100 dB0.71 mW3.2 mW
Voltage for 100 dB92 mV0.28 V
Current for 100 dB7.7 mA11.5 mA
Highest source impedance
that leaves them alone (one-eighth rule)
1.50 Ω3.00 Ω
Sources that reach 100 dB
out of 280
280280

Where the two part company

Every source in the database that drives one of them drives the other. On power, the choice between these two changes nothing about what amplifier you need.

5 sources are low enough in output impedance for the Beoplay H9i under the one-eighth rule but not for the Beoplay H95 (FiiO KA13, Schiit Vali 2+, Astell&Kern HC3, 2 more).

1 source stays below the audible-hiss threshold with the Beoplay H9i but crosses it with the Beoplay H95 (Schiit Mjolnir 3).

280 of the 280 sources here reach 100 dB on both.

What each one needs from 80 to 105 dB

The Beoplay H9i is more demanding than 70% of the 567 non-electrostatic models in this database; the Beoplay H95 than 30%.

dB SPLBeoplay H95 powerBeoplay H95 voltageBeoplay H9i powerBeoplay H9i voltage
807.1 µW9 mV0.03 mW28 mV
850.02 mW16 mV0.10 mW49 mV
900.07 mW29 mV0.32 mW87 mV
950.22 mW52 mV1.0 mW0.15 V
1000.71 mW92 mV3.2 mW0.28 V
1052.2 mW0.16 V10 mW0.49 V

The cheapest source that satisfies both

SourcePriceHeadroom, Beoplay H95Headroom, Beoplay H9iOutput impedanceNoise
JadeAudio JA11$2012.0 dB8.5 dB0.5 Ω1.7 µV
FiiO KA11$2924.1 dB18.3 dB0.7 Ω1.7 µV
FiiO BTR11$3616.8 dB10.4 dB0.5 Ω8.0 µV

Of the 280 sources here, 280 reach 100 dB on both. 68 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both.

The cheapest of the 68 is the JadeAudio JA11, at $20. It leaves 12.0 dB of headroom on the Beoplay H95 and 8.5 dB on the Beoplay H9i, its output impedance is 0.5 Ω against a one-eighth limit of 1.50 Ω and 3.00 Ω, and its noise figure puts the hiss floor 15 dB and 24 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.

Try any other source.

What each sheet prints, and what it is worth

ModelAs printedToleranceStandard
Beoplay H9520–22,000 Hznot printednot printed
Beoplay H9i20 Hz – 22 kHznot printednot printed

Bang & Olufsen prints 20–22,000 Hz for the Beoplay H95 and 20 Hz – 22 kHz for the Beoplay H9i.

Neither range has a tolerance printed beside it, so a wider range on one sheet is not deeper bass or more treble.

Not a measurement; maker by maker.

Both pages in full

Both have a page of their own. In full: Bang & Olufsen Beoplay H95 and Bang & Olufsen Beoplay H9i. Every figure on this page comes from what Bang & Olufsen published, or is derived from it — what that maker publishes, counted.

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