Short answer: the HEDD Heddphone 2 GT. It ranks #107 of 481 over-ear headphones by sound quality, rated 4.0/5, at $2,199; the ZMF Ori 3.0 ranks #193, rated 3.7/5, and costs $2,199.99, so there is not much of a tradeoff to weigh.
What the HEDD Heddphone 2 GT does well: A full-range Air Motion Transformer open-back that measures very close to the Harman target (score 82 across four measurements), with full sub-bass to 20 Hz. The tradeoff: Heavy at 1.2 lbs (550 g), and its low 88 dB/mW sensitivity needs a strong desktop amplifier.
What the ZMF Ori 3.0 does well: The median of 3 hobbyist measurements gives it a very good Harman preference score of 75 with a 2.76 dB spread. Watch for: A 6.2 dB peak near 1.5 kHz can make cymbals and sibilance sound sharp.
Buy the HEDD Heddphone 2 GT. It is rated higher for sound quality than the ZMF Ori 3.0 and costs less, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphones rankings cover every ranked option.
A full-range Air Motion Transformer open-back that measures very close to the Harman target (score 82 across four measurements), with full sub-bass to 20 Hz.
HEDD $2,199.00 eBay
The median of 3 hobbyist measurements gives it a very good Harman preference score of 75 with a 2.76 dB spread.
ZMF $2,199.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| HEDD Heddphone 2 GT | ZMF Ori 3.0 | |
|---|---|---|
| Price | $2,199.00 | $2,199.99 |
| Ranked | #107 of 481 in Over-Ear Headphones | #193 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Back | Open | Closed |
| Connection | Wired | Wired |
| Driver Type | Air Motion Transformer | Planar magnetic |
| Drivers | Full-range AMT with VVT | 1 x 80mm planar magnetic |
| Impedance | 41 ohms | 60 ohms |
| Sensitivity | 88 dB SPL/mW | 95 dB/mW |
| Harman Preference Score | 82 (median of 4 squig.link measurements, calibrated to AutoEQ) | 75 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.07 dB standard deviation | 2.76 dB standard deviation |
| Tonal Tilt | -0.29 (negative is warmer, positive brighter) | -0.22 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.8 dB at 30 Hz) |
| Frequency Response | 10Hz - 40kHz | - |
| Weight | 1.2 lbs (550 g) | 1.2 lbs (540 g) |
| Built-in Microphone | - | No |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the HEDD Heddphone 2 GT from gadgetrytech, kr0mka, listener and superreview; the ZMF Ori 3.0 from aden, gadgetrytech and kr0mka, all via squig.link.
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