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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a compact true-wireless in-ear pair with adaptive noise cancellation and a quick-charge case, choose Bowers & Wilkins Pi5; if you need over-ear planar magnetic headphones with aptX Adaptive, LDAC and up to 80 hours of playback, choose Amazon Renewed Edifier STAX Spirit.
• Bowers & Wilkins Pi5 — biggest strength: true-wireless in-ear design with three-level adaptive noise cancellation, four microphones and Bluetooth 5.0 with Qualcomm aptX, plus up to 12 hours of playback including the charging case.
• Bowers & Wilkins Pi5 — biggest trade-off: it tops out at 12 hours total, its codec support is aptX rather than aptX Adaptive, and fit depends heavily on matching the earbud tips to your ear canals.
• Amazon Renewed Edifier STAX Spirit — biggest strength: planar magnetic drivers with aptX Adaptive, aptX Lossless, LDAC and LHDC over Bluetooth 5.4, and up to 80 hours of playback with a 10-minute charge giving 11 hours.
• Amazon Renewed Edifier STAX Spirit — biggest trade-off: it's an over-ear headphone rather than something pocketable, it carries a 90-day limited warranty, and its frequency range starts at 40Hz instead of 10Hz.
• Who each pick is for: the Pi5 suits commuters and call-heavy users who want small earbuds with active noise cancellation; the STAX Spirit suits listeners who want the widest codec support and marathon battery life at a desk, on a couch or on a long flight.
The Pi5 is a true-wireless in-ear headphone built around Bluetooth 5.0 with Qualcomm aptX technology. In practice that means stable connectivity and high-fidelity streaming from a phone, tablet or PC, and the ability to connect to two devices at the same time — handy if you're switching between a laptop and a phone all day. The driver is a dynamic driver with a 10Hz to 20kHz frequency range and 8 ohm impedance, so the low end of the spec sheet reaches deeper than the STAX Spirit's 40Hz floor.
The feature that defines this pair is its noise cancellation. A multi-function button on the left earbud cycles between three levels — high, low and auto — so you can dial the cancellation to a noisy train, a quiet office or somewhere in between. Four built-in microphones handle call clarity, and Bowers & Wilkins explicitly notes that tip fit matters: if the earbud tips don't match your ear canals, sound quality and call performance suffer. That's why the box includes S, M and L tips — plan on experimenting.
Battery is where you need to be realistic. The charging case holds two 350mAh batteries and the system delivers up to 12 hours of continuous playback including the case, with a 15-minute quick charge giving up to 2 hours. That's a workday-and-commute figure, not a week-long one.
Amazon Renewed Edifier STAX Spirit: Who It's For
This is a completely different animal: an over-ear, closed-back headphone using planar magnetic drivers with an EqualMass diaphragm. Edifier's pitch is uniform driving force across the diaphragm surface for low distortion and fast response, and a second-generation EqualMass wiring layout that keeps the diaphragm stable across all frequencies. If you've only heard dynamic drivers, the planar approach is the headline reason to look here.
The wireless side is the strongest part of the spec sheet. The Qualcomm QCC5181 platform with Snapdragon Sound supports LDAC, LHDC and the full Snapdragon Sound codec suite — aptX HD, aptX Adaptive and aptX Lossless. aptX Adaptive is the one that matters most for everyday use: it maintains high-resolution audio up to 24-bit/96kHz with minimal latency of just 89 ms end-to-end, which is why this pair is a reasonable choice for video and gaming as well as music. Bluetooth 5.4 adds simultaneous connection to two devices and Google Fast Pair for quick Android pairing.
Battery life is the other standout: up to 80 hours of continuous playback on a single charge, and a 10-minute charge yields 11 hours. That's the kind of number that makes charging anxiety disappear on a long trip. Comfort hardware includes an adjustable headband, genuine lambskin earpads, a foldable structure and a carry case. Dual microphones with Qualcomm cVc suppress ambient noise for calls, and the Edifier ConneX app adds personalized EQ with three presets plus custom tuning.
Two things to weigh honestly. First, this is a Renewed unit with a 90-day limited warranty rather than a new-product warranty. Second, its frequency range is 40Hz–20kHz with 32 ohm impedance — narrower at the bottom than the Pi5, so deep-bass purists should note the difference. It also has USB-C and 3.5mm AUX inputs, which the Pi5 lacks entirely.
Buy the STAX Spirit if you want the broadest codec support including aptX Adaptive, you need multi-day battery, you prefer over-ear comfort, or you want wired USB-C and AUX options. Skip it if you need something pocketable, you rely on in-ear noise isolation, or you're uncomfortable with a short renewed warranty.
• Best for aptX Adaptive and Lossless → Amazon Renewed Edifier STAX Spirit. The Pi5 offers Qualcomm aptX; the STAX Spirit supports aptX Adaptive, aptX Lossless and aptX HD within the Snapdragon Sound suite.
• Best for battery life → Amazon Renewed Edifier STAX Spirit. Up to 80 hours versus up to 12 hours including the case.
• Best for fast top-ups → Amazon Renewed Edifier STAX Spirit. A 10-minute charge gives 11 hours, compared with 15 minutes for up to 2 hours on the Pi5.
• Best for commuting and calls on the go → Bowers & Wilkins Pi5. In-ear, pocketable, four microphones and a three-level adaptive noise cancellation button.
• Best for lowest latency → Amazon Renewed Edifier STAX Spirit. 89 ms end-to-end with aptX Adaptive, which suits video and gaming.
• Best for wired flexibility → Amazon Renewed Edifier STAX Spirit. USB-C and 3.5mm AUX inputs; the Pi5 has no headphone jack.
• Best for deep-bass extension on paper → Bowers & Wilkins Pi5. Its 10Hz–20kHz range reaches lower than the STAX Spirit's 40Hz–20kHz.
• Best for tuning and EQ control → Amazon Renewed Edifier STAX Spirit. The Edifier ConneX app offers three presets plus custom EQ.
In my opinion, the Amazon Renewed Edifier STAX Spirit is the stronger buy for anyone whose priority is aptX Adaptive headphones — that's the whole point of this comparison. The codec suite, the planar magnetic driver, the 80-hour battery and the 89 ms latency are all genuinely useful advantages, and the USB-C and AUX inputs make it far more versatile.
I'd only steer you to the Bowers & Wilkins Pi5 if portability and in-ear noise cancellation matter more than codecs and runtime, or if you simply don't want to deal with a 90-day renewed warranty. Check the current price on Amazon before deciding, since that gap often settles the question.
aptX Adaptive is a Qualcomm Bluetooth codec that adjusts its bitrate to balance audio quality and connection stability, and it also keeps latency low — on the Edifier STAX Spirit S5 it delivers high-resolution audio up to 24-bit/96kHz with about 89 ms end-to-end latency. Headphones that support it, like the STAX Spirit S5, can also handle related Snapdragon Sound codecs such as aptX HD and aptX Lossless. The Bowers & Wilkins Pi5 uses Bluetooth 5.0 with Qualcomm aptX, not aptX Adaptive.
Only the Amazon Renewed Edifier STAX Spirit. Its spec sheet lists LDAC, LHDC, aptX HD, aptX Adaptive and aptX Lossless via the Qualcomm QCC5181 platform and Snapdragon Sound. The Bowers & Wilkins Pi5 lists Bluetooth 5.0 with Qualcomm aptX technology.
Yes — the Renewed STAX Spirit S5 carries a 90-day limited warranty. That's shorter than the 2-year warranty listed for the Bowers & Wilkins Pi5, so factor that into your decision if long-term coverage matters to you.
The Bowers & Wilkins Pi5 provides up to 12 hours of continuous playback including its charging case, with a 15-minute quick charge adding up to 2 hours. The Edifier STAX Spirit S5 offers up to 80 hours of playback on a single charge, with a 10-minute charge giving 11 hours.
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