Short answer: the Pula Anvil114. Both are rated 3.7/5 for sound quality (#681 and #657 of 1291 in-ear headphones), and the Pula Anvil114 costs $194.99 against $200 for the Akoustyx S-6, and with sound quality even, the cheaper one is the better buy.
Why pick the Akoustyx S-6: A single planar magnetic IEM with full sub-bass extension to 20 Hz and a Harman preference score of 70 across three measurements. Watch for: Treble sits about 2.4 dB above target, so it can sound bright.
Why pick the Pula Anvil114: A broadly balanced tuning with a preference score of 70 against the Harman target. The tradeoff: An uneven response, 2.2 dB standard deviation from target.
Buy the Pula Anvil114. Both are rated the same for sound quality, and it costs $5.01 less than the Akoustyx S-6.
Still deciding? The full Headphones rankings cover every ranked option.
A single planar magnetic IEM with full sub-bass extension to 20 Hz and a Harman preference score of 70 across three measurements.
Akoustyx $200.00 eBay
A broadly balanced tuning with a preference score of 70 against the Harman target.
HiFiGo $194.99 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
| Akoustyx S-6 | Pula Anvil114 | |
|---|---|---|
| Price | $200.00 | $194.99 |
| Ranked | #657 of 1291 in In-Ear Headphones | #681 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired (3.5mm / 4.4mm) |
| Driver Type | Planar Magnetic | Tribrid |
| Drivers | 1 x planar magnetic | 1 Dynamic, 4 Balanced Armature, 1 Bone Conduction |
| Impedance | 18 ohms | - |
| Sensitivity | 108 dB SPL | - |
| Harman Preference Score | 70 (median of 3 squig.link measurements, calibrated to AutoEQ) | 70 (median of 10 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.24 dB standard deviation | 2.18 dB standard deviation |
| Tonal Tilt | -0.32 (negative is warmer, positive brighter) | -0.36 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+5.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.2 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 Akoustyx S-6 from dentreviews, superreview and treblewellxtended; the Pula Anvil114 from atechreviews, boizoff, elrics, iemocean, jaytiss, silicagel, sl0the, soundcheck39, soundignity, superreview and tonedeafmonk, all via squig.link.
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