Fir Audio e12 Review: Ranked #226 of 297

Last updated: October 10, 2026

The Fir Audio e12 ranks #226 out of 297 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.

Prices on this page were last checked October 10, 2026 at 5:37 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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#226 Fir Audio e12: $1,799.00 Audio46 eBay

Pros: A big, energetic V shaped tuning in HypetheSonics’ measurement, with sub-bass about 4 dB and bass about 5.5 dB above target for heavy, physical kick drums and synth lines. Mids stay close to target from 1 to 6 kHz, so vocals are not buried under the bass. It suits listeners who want a fun, bass forward sound from a single 12 mm dynamic driver.

Cons: A 9.3 dB peak near 8.1 kHz and treble about 5 dB above target from 6 to 10 kHz can make cymbals and sibilance sharp and fatiguing at higher volume. The extra 5.5 dB of bass also thickens the low mids on acoustic and vocal recordings, and the 64 Audio A12t rates slightly higher at a similar price.

BackClosed
Built-in MicrophoneNo
ConnectionWired
Deviation From Target2.66 dB standard deviation
Driver TypeDynamic
Drivers1 x 12mm dynamic
Form FactorIn-ear
Frequency Response20Hz - 20kHz (Manufacturer specified)
Harman Preference Score64 (measured by HypetheSonics, via AutoEQ)
Impedance16 ohms
Sub-bass ExtensionWithin 6 dB of target down to 20 Hz (+3.5 dB at 30 Hz)
Tonal Tilt-0.62 (negative is warmer, positive brighter)
EQ preset to match the Harman target

Set a preamp of -4.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.

FilterFrequencyGainQ
Low shelf105 Hz-2.5 dB0.70
Peak806 Hz+4.2 dB0.87
Peak172 Hz-3.5 dB1.00
Peak3,777 Hz+8.8 dB2.09
Peak5,026 Hz-5.7 dB0.80
High shelf10,000 Hz+0.6 dB0.70
Peak5,514 Hz-2.7 dB6.00
Peak6,361 Hz+2.6 dB6.00
Peak62 Hz+0.4 dB1.79
Peak2,239 Hz-0.9 dB4.08