The Abyss AB1-266 Phi TC ranks #102 out of 201 total Over-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.
As an eBay Partner, we may be compensated if you make a purchase.
#102 Abyss AB1-266 Phi TC: $5,995.00 Abyss eBay
Pros: Oratory1990’s measurement gives it a preference score of 73, and air above 10 kHz is lifted about 3 dB, giving cymbals and room sound a light, airy sheen. The open-back 66mm planar magnetic driver suits listeners who prefer a relaxed, laid-back presentation. It matches the rating of the Audeze LCD-5 and is rated above the Focal Utopia 2022.
Cons: Bass sits about 6 dB below target under 60 Hz and 3 dB low from 60 to 200 Hz, so kick drums and bass lines sound thin, and treble from 6 to 10 kHz is about 6 dB low with a 10 dB dip near 6.5 kHz that veils detail. At 88 dB/mW sensitivity it needs a capable headphone amp, it weighs 640 g, and the open back leaks sound and offers no isolation. The Stax SR-009S is rated higher for less money.
| Back | Open |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.81 dB standard deviation |
| Driver Type | Planar magnetic |
| Drivers | 1 x 66mm planar magnetic |
| Form Factor | Over-ear |
| Frequency Response | 5Hz - 45kHz (Manufacturer specified) |
| Harman Preference Score | 73 (measured by oratory1990, via AutoEQ) |
| Impedance | 50 ohms |
| Sensitivity | 88 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.7 dB at 30 Hz) |
| Tonal Tilt | -0.39 (negative is warmer, positive brighter) |
| Weight | 1.4 lbs (640 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 | +3.6 dB | 0.70 |
| Peak | 1,064 Hz | -5.3 dB | 1.29 |
| Peak | 3,885 Hz | +5.4 dB | 2.10 |
| Peak | 236 Hz | -2.3 dB | 1.36 |
| Peak | 1,952 Hz | +3.7 dB | 3.03 |
| High shelf | 10,000 Hz | -9.6 dB | 0.70 |
| Peak | 8,198 Hz | +5.2 dB | 0.96 |
| Peak | 5,233 Hz | -4.8 dB | 5.05 |
| Peak | 1,416 Hz | -0.4 dB | 4.94 |
| Peak | 2,854 Hz | -1.2 dB | 4.61 |
- Reviews, Comparisons and Sound Samples