Short answer: the 64 Audio U12t. It ranks #945 of 1291 in-ear headphones by sound quality, rated 3.2/5, at $1,999; the Ice Lab Spectrumica ranks #979, rated 3.1/5, at $1,999. With prices this close, go by the sound-quality ranking rather than the cost.
The case for the 64 Audio U12t: Twelve balanced armatures produce a warm, smooth tuning with sub-bass right on target down to 20 Hz and about 1.6 dB of extra bass for body. Watch for: Presence sits about 5.7 dB below target from 3 to 6 kHz, with a 7.9 dB dip near 3.3 kHz, so vocals and guitars sound distant and detail is subdued.
The case for the Ice Lab Spectrumica: Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. The catch: Presence sits about 6 dB low with an 8.2 dB dip near 3.5 kHz, so vocals and instruments lose some bite.
Buy the 64 Audio U12t. It is rated higher for sound quality than the Ice Lab Spectrumica at the same price, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Headphones rankings.
Twelve balanced armatures produce a warm, smooth tuning with sub-bass right on target down to 20 Hz and about 1.6 dB of extra bass for body.
64 Audio $1,999.00 eBay
Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
Bloom Audio $1999 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
| 64 Audio U12t | Ice Lab Spectrumica | |
|---|---|---|
| Price | $1,999.00 | $1999 |
| Ranked | #945 of 1291 in In-Ear Headphones | #979 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 64 (measured by crinacle, via AutoEQ) | 62 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.67 dB standard deviation | 2.88 dB standard deviation |
| Tonal Tilt | -0.86 (negative is warmer, positive brighter) | -0.62 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Balanced armature | Hybrid |
| Drivers | 12 x balanced armature | 1 x dynamic + 4 x balanced armature + 2 x electrostatic + 1 x bone conduction |
| Impedance | 12.6 ohms | 7 ohms |
| Sensitivity | 108 dB/mW | - |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | 10Hz - 40kHz |
| Built-in Microphone | No | - |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.9 dB at 30 Hz) |
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 64 Audio U12t from aden, adri-n, aquaphobic, bloomaudio, dchpgall, ekaudio, eliseaudio, harutohiroki, iemworld, joshtbvo, kazi, koi, lown-fi, nymz, precog, silicagel, sl0the, superreview, theaudiostore, therollo9, timmyv, tonedeafmonk, treblewellxtended and vsg; the Ice Lab Spectrumica from aden, aftersound, bassaudio, bloomaudio, ducbloke, eliseaudio, fahryst, gadgetgenerations, gadgetrytech, harutohiroki, jaytiss, joycesreview, superreview, theaudiostore, treblewellxtended and zerostresslevel, all via squig.link.
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