Short answer: the Ice Lab Spectrumica. It ranks #979 of 1291 in-ear headphones by sound quality, rated 3.1/5, at $1,999; the 64 Audio Volur ranks #986, rated 3.0/5, and costs $2,499, so there is not much of a tradeoff to weigh.
What the Ice Lab Spectrumica does well: Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. The tradeoff: Presence sits about 6 dB low with an 8.2 dB dip near 3.5 kHz, so vocals and instruments lose some bite.
What the 64 Audio Volur does well: Two 9mm dynamic drivers deliver about 3 to 4 dB of extra sub-bass and bass in HypetheSonics’ measurement, still 2 dB above target at 30 Hz, so bass-heavy music has real depth and slam. The catch: A 4.6 dB dip near 3.4 kHz and a 2.4 dB shortfall across 3 to 6 kHz push vocals back behind the bass.
Buy the Ice Lab Spectrumica. It is rated higher for sound quality than the 64 Audio Volur and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
Bloom Audio $1999 eBay
Two 9mm dynamic drivers deliver about 3 to 4 dB of extra sub-bass and bass in HypetheSonics’ measurement, still 2 dB above target at 30 Hz, so bass-heavy music has real depth and slam.
64 Audio $2,499.00 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
| Ice Lab Spectrumica | 64 Audio Volur | |
|---|---|---|
| Price | $1999 | $2,499.00 |
| Ranked | #979 of 1291 in In-Ear Headphones | #986 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Hybrid (2 dynamic + 8 balanced armature) |
| Drivers | 1 x dynamic + 4 x balanced armature + 2 x electrostatic + 1 x bone conduction | 2 x 9mm dynamic + 8 x balanced armature |
| Impedance | 7 ohms | 6.3 ohms |
| Frequency Response | 10Hz - 40kHz | 5Hz - 22kHz (Manufacturer specified) |
| Harman Preference Score | 62 (median of 13 squig.link measurements, calibrated to AutoEQ) | 62 (measured by HypetheSonics, via AutoEQ) |
| Deviation From Target | 2.88 dB standard deviation | 2.56 dB standard deviation |
| Tonal Tilt | -0.62 (negative is warmer, positive brighter) | -1.19 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+2.0 dB at 30 Hz) |
| Sensitivity | - | 103 dB/mW |
| 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 Ice Lab Spectrumica from aden, aftersound, bassaudio, bloomaudio, ducbloke, eliseaudio, fahryst, gadgetgenerations, gadgetrytech, harutohiroki, jaytiss, joycesreview, superreview, theaudiostore, treblewellxtended and zerostresslevel; the 64 Audio Volur from aden, adri-n, bloomaudio, ducbloke, ekaudio, elrics, hbb, precog, superreview, theaudiostore, tonedeafmonk, treblewellxtended, vsg and zerostresslevel, all via squig.link.
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