We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 6 min read · Independent comparison
If you want a self-contained, all-day wireless over-ear headphone for movies, calls and commuting, choose August EP650; if you need a pocket-sized USB-C DAC amp to squeeze hi-res sound out of wired IEMs, choose BQEYZ C30. These two aren't really rivals — they solve completely different problems — so the "better" one is simply the one that matches how you actually listen.
• August EP650 — biggest strength: A complete wireless headphone: 50mm dynamic drivers, Bluetooth with aptX Low Latency, NFC, multipoint pairing and a built-in mic, all in one 235 g over-ear package.
• August EP650 — biggest trade-off: It's a Bluetooth headphone first, with a rated 15-hour battery life and a 2-hour charge time, so it's not a wired-only purist's tool, and its low-latency trick only pays off with compatible sources.
• BQEYZ C30 — biggest strength: A 10 g CNC aluminum USB-C dongle that decodes up to 32-bit/384kHz through an independent OPA amplifier, with both 3.5mm and 4.4mm outputs and a 10-band parametric EQ.
• BQEYZ C30 — biggest trade-off: It makes no sound on its own — you must already own wired IEMs or headphones, and full EQ tuning needs Android or a web browser (iOS is hardware-tuned only).
• Pick August EP650 if you want one device that does music, TV, gaming and hands-free calls wirelessly.
• Pick BQEYZ C30 if you already have good wired earphones and want to upgrade the source, not the headphones.
The EP650 is the "one pair does everything" answer. August built it around 50mm dynamic drivers with a 60Hz–20KHz range, and the tuning intent is clearly bass-forward and cinematic — good for films, games and streaming rather than analytical listening. The Comfort-Flex design (soft padding, lightweight 235 g frame, adjustable headband, flexible earcups) tells you it's aimed at long sessions: a full workday of calls, a long-haul flight, an evening of gaming.
The feature list is where it earns its keep. Bluetooth with aptX Low Latency keeps audio and video in sync when the source supports it, which matters on a TV or laptop. NFC gives you a quick tap-to-connect. Multipoint pairing lets it hold two devices at once — your phone plus your PC — so a call interrupts your music and playback resumes afterward. There's a built-in mic with on-ear controls for volume, tracks and calls, plus VOIP support for Skype-style apps, and a 3.5mm jack so you can go wired when the battery runs out. The free August Audio EQ app adds bass/balanced/bright tuning if you want to nudge the sound.
BQEYZ C30: Who It's For
The C30 is a different animal entirely: it's a decoder, not a headphone. Weighing just 10 g with a 1.43" × 0.67" CNC-machined aluminum body, it plugs straight into a USB-C port and converts your phone, laptop or PC into a hi-res source. Inside, a high-performance DAC pairs with an independent OPA amplifier chip and supports PCM up to 32-bit/384kHz — the kind of headroom that matters with Apple Music Hi-Res, Tidal Masters or local FLAC files. Low-noise circuitry means it stays quiet even with sensitive IEMs, which is the usual weak point of cheap dongles.
Its most interesting design choice is dual output. You get a 3.5mm single-ended port for standard headsets and a 4.4mm balanced port for cleaner channel separation, a wider soundstage and more dynamic range — the natural partner for multi-driver IEMs and portable headphones. BQEYZ says you can even run both at once to share a playlist. Power output is rated at 57mW@32Ω, which is fine for IEMs and efficient portable headphones, though it isn't a desktop amp for power-hungry planars.
Then there's tuning. The free Android app or web interface gives you a 10-band parametric EQ with control over frequency, Q value, gain and filter type — bass-heavy tracks, vocal-forward podcasts, gaming footsteps, all doable. The honest caveat: iOS permissions block in-app tuning, so iPhone users get hardware tuning out of the box (which BQEYZ rates as excellent) and would need an Android device or the web interface to build custom profiles. Plug-and-play covers Android, iPhone 15/16 series, Windows, macOS and HarmonyOS with no drivers.
Who should buy it: anyone who already owns wired IEMs or headphones and wants noticeably better sound from a phone or laptop, plus tinkerers who enjoy EQ. Who should skip it: people who want a wireless, all-in-one listening device — the C30 gives you nothing to listen with.
Side-by-Side: Which Should You Choose?
• Best for sound quality from a phone → BQEYZ C30. 32-bit/384kHz decoding with a dedicated OPA amp beats a standard headphone jack.
• Best for TV, movies and gaming audio sync → August EP650, thanks to aptX Low Latency with compatible sources.
• Best for wired IEM owners → BQEYZ C30, especially with its 4.4mm balanced output.
• Best for hands-free calls → August EP650. Built-in mic, on-ear controls and VOIP support.
• Best for customization → BQEYZ C30. A 10-band parametric EQ versus the EP650's simpler preset EQ app.
• Best for all-day comfort → August EP650. Over-ear padding and a 235 g frame built for long sessions.
• Best for portability → BQEYZ C30. At 10 g it disappears into a coin pocket; the EP650 does not.
• Best for battery anxiety → August EP650 (15 hours rated), though the C30 draws power from whatever it's plugged into.
In my opinion, most people shopping this comparison should buy the August EP650. It's the complete product: put it on, pair it, and you have music, movies, gaming and calls covered, wirelessly, with a wired option when you need it. The BQEYZ C30 is the smarter buy only if you already own good wired IEMs and your real complaint is your phone or laptop's built-in audio. If that's you, the C30 is the bigger upgrade per device — I'd take it over a new pair of budget earphones. But if you're starting from nothing, the EP650 gets you listening immediately. Either way, check the current price on Amazon before deciding, since value shifts with whatever you already own.
The EP650, because aptX Low Latency keeps audio and video in sync with compatible Bluetooth sources. The C30 has no wireless at all — it's a wired USB-C decoder, so it's only relevant if you're listening through wired headphones.
Yes — any wired 3.5mm or 4.4mm headphone or IEM works, but the C30 makes no sound by itself. The 4.4mm balanced output is where it performs best with multi-driver IEMs.
Yes, it works plug-and-play with iPhone 15/16 series over USB-C. The catch is tuning: iOS doesn't allow the mobile app, so EQ profiles must be built on Android or the web interface and then used with the iPhone.
They're not directly comparable — one is a headphone, the other is a DAC amp. In my opinion the EP650 delivers more "complete system" per purchase, while the C30 is better value only if you already own wired earphones worth upgrading. Compare current prices on Amazon for your own setup.
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