Short answer: the HIFIMAN Deva Pro. Both are rated 4.0/5 for sound quality (#70 and #68 of 216 over-ear headphones), and the HIFIMAN Deva Pro costs $199 against $209.95 for the AKG K612 Pro, and with sound quality even, the cheaper one is the better buy.
What the AKG K612 Pro does well: Crinacle’s measurement gives it a preference score of 81, and across hobbyist measurements on squig.link every band from 60 Hz to 10 kHz sits within about 2 dB of the Harman target, so voices, guitars and pianos come through with a natural balance. The catch: Sub-bass averages 4.4 dB below target under 60 Hz and falls 6 dB short by 28 Hz, so synth bass and kick drums lose some deep rumble.
The case for the HIFIMAN Deva Pro: A preference score of 81 with a deviation of 2.2 dB in oratory1990’s measurement shows a smooth, slightly warm response with the midrange close to target. The tradeoff: Sub-bass is about 7.5 dB under target, so deep bass lacks rumble.
Buy the HIFIMAN Deva Pro. Both are rated the same for sound quality, and it costs $10.95 less than the AKG K612 Pro.
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Specifications Side By Side
| AKG K612 Pro | HIFIMAN Deva Pro | |
|---|---|---|
| Price | $209.95 | $199.00 |
| Ranked | #68 of 216 in Over-Ear Headphones | #70 of 216 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 81 (measured by crinacle, via AutoEQ) | 81 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.27 dB standard deviation | 2.18 dB standard deviation |
| Tonal Tilt | +0.33 (negative is warmer, positive brighter) | -0.38 (negative is warmer, positive brighter) |
| Connection | Wired | Wireless and wired |
| Back | Open | Open |
| Driver Type | Dynamic | Planar magnetic |
| Drivers | 1 x 50mm dynamic | - |
| Impedance | 120 ohms | 18 ohms |
| Sensitivity | 101 dB SPL/V | 93.5 dB |
| Weight | 0.5 lbs (238 g) | 0.8 lbs (360 g) |
| Frequency Response | 12Hz - 39.5kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Sub-bass Extension | Falls 6 dB below target at 28 Hz (-5.9 dB at 30 Hz) | Falls 6 dB below target at 42 Hz (-8.8 dB at 30 Hz) |
| Built-in Microphone | - | No |
Related Headphone Comparisons
How AKG K612 Pro compares with other leading options:
- FiiO FT3 vs AKG K612 Pro
- Sennheiser HD 25 Plus vs AKG K612 Pro
- AKG K612 Pro vs Beyerdynamic DT 770 Pro
- AKG K612 Pro vs Beyerdynamic DT 990 Pro
- Sennheiser HD 25 Plus vs HIFIMAN Deva Pro
Prices on this page were last checked October 11, 2026 at 4:59 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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The Two Headphones In Full
AKG K612 Pro: $209.95 Amazon eBay
Pros: Crinacle’s measurement gives it a preference score of 81, and across hobbyist measurements on squig.link every band from 60 Hz to 10 kHz sits within about 2 dB of the Harman target, so voices, guitars and pianos come through with a natural balance. The open back gives a spacious, speaker-like presentation, and at 238 g it is a light headphone for long sessions at a desk. It suits listeners who want a neutral or mildly V-shaped sound.
Cons: Sub-bass averages 4.4 dB below target under 60 Hz and falls 6 dB short by 28 Hz, so synth bass and kick drums lose some deep rumble. A 6.9 dB peak near 11.5 kHz in the squig.link measurements can make cymbals sound splashy, and at 120 ohms and 101 dB/V it gets louder and fuller from a headphone amp or strong dongle than from a phone. The open back leaks sound and blocks no outside noise. See headphone amps and DACs with enough power to drive it.
Full AKG K612 Pro review and specifications →
| Back | Open |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.27 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 50mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 12Hz - 39.5kHz (Manufacturer specified) |
| Harman Preference Score | 81 (measured by crinacle, via AutoEQ) |
| Impedance | 120 ohms |
| Sensitivity | 101 dB SPL/V |
| Sub-bass Extension | Falls 6 dB below target at 28 Hz (-5.9 dB at 30 Hz) |
| Tonal Tilt | +0.33 (negative is warmer, positive brighter) |
| Weight | 0.5 lbs (238 g) |
EQ preset to match the Harman target
Set a preamp of -5.9 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.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +6.0 dB | 0.70 |
| Peak | 175 Hz | -1.9 dB | 0.45 |
| Peak | 744 Hz | +2.9 dB | 1.70 |
| Peak | 2,519 Hz | -2.4 dB | 3.07 |
| Peak | 5,923 Hz | -2.8 dB | 6.00 |
| High shelf | 10,000 Hz | +1.1 dB | 0.70 |
| Peak | 67 Hz | -1.2 dB | 2.17 |
| Peak | 85 Hz | +2.2 dB | 6.00 |
| Peak | 1,518 Hz | +0.7 dB | 4.54 |
| Peak | 4,342 Hz | +0.9 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
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HIFIMAN Deva Pro: $199.00 Wireless Amazon eBay
Pros: A preference score of 81 with a deviation of 2.2 dB in oratory1990’s measurement shows a smooth, slightly warm response with the midrange close to target. The planar magnetic driver is easy to drive at 18 ohms and 93.5 dB, and it can connect wirelessly or by cable. The open back gives a roomy sound.
Cons: Sub-bass is about 7.5 dB under target, so deep bass lacks rumble. Treble from 6 to 10 kHz is about 4.1 dB low with a 9.4 dB dip near 9.2 kHz, which dulls cymbals and detail. At 360 g it is heavy, and the open back leaks sound with no isolation.
Full HIFIMAN Deva Pro review and specifications →
| Released | Oct 2021 (5 years ago) |
|---|---|
| Back | Open |
| Built-in Microphone | No |
| Connection | Wireless and wired |
| Deviation From Target | 2.18 dB standard deviation |
| Driver Type | Planar magnetic |
| Form Factor | Over-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 81 (measured by oratory1990, via AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 93.5 dB |
| Sub-bass Extension | Falls 6 dB below target at 42 Hz (-8.8 dB at 30 Hz) |
| Tonal Tilt | -0.38 (negative is warmer, positive brighter) |
| Weight | 0.8 lbs (360 g) |
EQ preset to match the Harman target
Set a preamp of -6.5 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.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +7.3 dB | 0.70 |
| Peak | 87 Hz | -3.8 dB | 0.49 |
| Peak | 7,039 Hz | +3.6 dB | 1.30 |
| Peak | 1,960 Hz | +4.9 dB | 2.77 |
| Peak | 1,160 Hz | -2.6 dB | 0.94 |
| High shelf | 10,000 Hz | +0.9 dB | 0.70 |
| Peak | 308 Hz | -0.8 dB | 1.53 |
| Peak | 140 Hz | +0.6 dB | 2.02 |
| Peak | 439 Hz | +1.0 dB | 4.16 |
| Peak | 5,992 Hz | +1.2 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons