Short answer: the Final Audio E4000, though neither ranks well in its class. It ranks #1131 of 1291 in-ear headphones by sound quality, rated 2.2/5, at $162; the Sennheiser CX Plus True Wireless ranks #1138, rated 2.1/5, and costs $170.95, so there is little reason to consider the other one. Both are rated below 3.0/5 among the 1291 in-ear headphones, and the Truthear Nova, ranked #2 at $169.99, is a better place to start if sound quality matters.
Why pick the Final Audio E4000: Lower mids sit within about 0.6 dB of target, keeping voices and guitars natural. The catch: Presence sits about 5.9 dB low with a 9.8 dB dip near 11.5 kHz, so vocals and instruments lose some bite.
What the Sennheiser CX Plus True Wireless does well: Supports aptX and aptX Adaptive along with AAC and SBC, so it streams well from Qualcomm based Android phones. Watch for: An 11.4 dB treble peak near 10.2 kHz makes cymbals and sibilance sharp and fatiguing, while a 6.6 dB shortfall from 3 to 6 kHz hollows out vocals.
Buy the Final Audio E4000. It is rated higher for sound quality than the Sennheiser CX Plus True Wireless and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
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Lower mids sit within about 0.6 dB of target, keeping voices and guitars natural.
Amazon $162.00 eBay
Supports aptX and aptX Adaptive along with AAC and SBC, so it streams well from Qualcomm based Android phones.
Amazon $170.95 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
| Final Audio E4000 | Sennheiser CX Plus True Wireless | |
|---|---|---|
| Price | $162.00 | $170.95 |
| Ranked | #1131 of 1291 in In-Ear Headphones | #1138 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Connection | Wired | True wireless |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 6.4mm dynamic | 1 x 7mm dynamic |
| Impedance | 15 ohms | - |
| Sensitivity | 97 dB/mW | - |
| Harman Preference Score | 52 (measured by oratory1990, via AutoEQ) | 51 (median of 1 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.50 dB standard deviation | 3.86 dB standard deviation |
| Tonal Tilt | -1.05 (negative is warmer, positive brighter) | -0.76 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.6 dB at 30 Hz) |
| Back | - | Closed |
| Weight | - | 0 lbs (6 g) per earbud |
| Frequency Response | - | 5Hz - 21kHz (Manufacturer specified) |
| Active Noise Cancelling | - | Yes |
| Battery Life | - | 8 hours (24 with case, Manufacturer specified) |
| Bluetooth Version | - | 5.2 |
| Bluetooth Codecs | - | SBC, AAC, aptX, aptX Adaptive |
| Built-in Microphone | - | Yes |
| IP Rating | - | IPX4 |
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