Short answer: the CCA Polaris. It ranks #334 of 1291 in-ear headphones by sound quality, rated 4.1/5, at $13; the KZ EDA Balanced ranks #427, rated 4.0/5, and costs $16.99, so there is little reason to consider the other one.
Why pick the CCA Polaris: The median of 7 hobbyist measurements gives it a very good Harman preference score of 75 with a 1.98 dB spread, and its mids sit within about 0.9 dB of target, so vocals and instruments sound natural. The tradeoff: Presence sits about 3.3 dB low with a 5 dB dip near 5.9 kHz, so vocals and instruments lose some bite.
Why pick the KZ EDA Balanced: A 7 single dynamic IEM that measures well (score 74 across seven measurements), with bass on target down to 20 Hz. Watch for: The listing sells three tunings (Balanced, Bass and Hi-Res), so pick the silver Balanced version this rating covers.
Buy the CCA Polaris. It is rated higher for sound quality than the KZ EDA Balanced and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
The median of 7 hobbyist measurements gives it a very good Harman preference score of 75 with a 1.98 dB spread, and its mids sit within about 0.9 dB of target, so vocals and instruments sound natural.
Linsoul $13.00 eBay
A 7 single dynamic IEM that measures well (score 74 across seven measurements), with bass on target down to 20 Hz.
Amazon $16.99 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
| CCA Polaris | KZ EDA Balanced | |
|---|---|---|
| Price | $13.00 | $16.99 |
| Ranked | #334 of 1291 in In-Ear Headphones | #427 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 75 (median of 7 squig.link measurements, calibrated to AutoEQ) | 74 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.98 dB standard deviation | 1.82 dB standard deviation |
| Tonal Tilt | -0.07 (negative is warmer, positive brighter) | -0.57 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 10mm dynamic | 1 x dynamic |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | - |
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 CCA Polaris from fernandagunsan, koi, kuping-sensi, obodio, pw, soundignity and tonedeafmonk; the KZ EDA Balanced from ekaudio, hbb, hore, melatonin, practiphile, soundcheck39 and vortexreviews, all via squig.link.
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