Short answer: the Shure Aonic 4. It ranks #950 of 1291 in-ear headphones by sound quality, rated 3.2/5, at $349. The Punch Audio Martilo ranks #967, rated 3.1/5, at $329, $20 cheaper, not enough of a saving to outweigh the sound-quality gap.
What the Shure Aonic 4 does well: Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural. The catch: Presence sits about 5.7 dB low with a 9.6 dB dip near 5.9 kHz, so vocals and instruments lose some bite.
The case for the Punch Audio Martilo: Bass is lifted about 2.5 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. Watch for: A 5 dB peak near 11.9 kHz can make cymbals and sibilance sound sharp.
Buy the Shure Aonic 4. It is rated higher for sound quality, and saving $20 with the Punch Audio Martilo does not make up for the sound-quality gap.
Looking for alternatives? See the complete Headphones rankings.
Lower mids sit within about 0.5 dB of target, keeping voices and guitars natural.
Amazon $349.00 eBay
Bass is lifted about 2.5 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
Linsoul $329 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
| Shure Aonic 4 | Punch Audio Martilo | |
|---|---|---|
| Price | $349.00 | $329 |
| Ranked | #950 of 1291 in In-Ear Headphones | #967 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Tribrid |
| Drivers | 1 x dynamic + 1 x balanced armature | 2 x 8mm dynamic + 2 x balanced armature + 1 x planar |
| Impedance | 7 ohms | 9 ohms |
| Sensitivity | 106 dB/mW | - |
| Frequency Response | 20Hz - 19kHz | 10Hz - 22kHz (Manufacturer specified) |
| Weight | 0 lbs (21.1 g) | - |
| Harman Preference Score | 64 (measured by crinacle, via AutoEQ) | 63 (median of 24 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.83 dB standard deviation | 2.49 dB standard deviation |
| Tonal Tilt | -0.59 (negative is warmer, positive brighter) | -1.30 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.0 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+4.4 dB at 30 Hz) |
| Back | - | Closed |
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 Shure Aonic 4 from aden, ekaudio and hu-fi; the Punch Audio Martilo from aden, aftersound, arn, atechreviews, avishai, bassyalexander, csi-zone, dl, ducbloke, iemocean, jaytiss, joycesreview, lestat, pw, silicagel, sl0the, soundcheck39, soundignity, superreview, takeitslow7, theaudiostore, timmyv, tonedeafmonk and treblewellxtended, all via squig.link.
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