We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-28 · 6 min read · Independent comparison
If you want to turn a modern phone with no headphone jack into a genuine hi-res listening setup, choose Xumee USB C; if you need true wireless earbuds with a charging case and noise cancelling for workouts and travel, choose RCA Wave-78. These two products are often compared because both sit in the "hi-res" conversation, but they solve completely different problems — one is a wired DAC dongle, the other is a pair of Bluetooth earbuds. Here's how to pick.
• Xumee USB C — biggest strength: a built-in DAC that decodes up to 32-bit / 384 kHz audio, which is the higher-resolution end of what a phone dongle can pass through to your wired headphones.
• Xumee USB C — biggest trade-off: it is a dongle, not headphones. If you don't already own a decent wired headset, it does nothing for you, and on some phones with a 3.5 mm jack (plus iPad Pro 2018) call and wire-control functions won't work.
• RCA Wave-78 — biggest strength: fully self-contained wireless earbuds with Bluetooth, adaptive noise cancellation, touch controls and a charging case rated for about 20–22 hours of total playtime.
• RCA Wave-78 — biggest trade-off: wireless audio over Bluetooth 5.2 tops out well below the native resolution a wired DAC can carry, and the driver range is a standard 20 Hz–20 kHz.
• Who Xumee USB C is for: someone with wired headphones and a USB-C phone who wants the cleanest possible signal path.
• Who RCA Wave-78 is for: someone who wants cable-free convenience, a mic for calls, and sweat resistance for the gym.
The Xumee USB C adapter is, at heart, a tiny external sound card. Its whole reason to exist is the DAC inside: it handles up to 32-bit / 384 kHz, and the spec sheet calls out that many competing dongles stop at 24-bit/96 kHz or 16-bit/48 kHz. If you own wired headphones that can resolve detail — or even a decent pair of in-ears — this is the piece that lets your USB-C phone feed them properly instead of relying on whatever the phone's internal path does. There's also an emphasis on noise reduction, which matters when you're plugging into a phone that shares its port with charging and data.
It's also genuinely pocket-sized: roughly 4.96 x 0.43 x 0.31 inches and about 4.5 grams, with a slim black finish and a strain-relief design that the sheet says survives repeated bending. Plug-and-play, no drivers, no separate power. You get music playback, call answering through your headset mic, and inline wire controls.
Who should buy it: anyone with a USB-C phone — the compatibility list covers iPhone 16/15 family, most Pixel models from 2 through 8, a long run of Samsung Galaxy S and Note devices, iPad Pro, Huawei, OnePlus and Moto Z — who wants to keep using wired headphones. Who should skip it: if you've already moved to wireless earbuds, or if you're on a phone that still has its own 3.5 mm jack and you rely on the inline mic, since call and wire-control functions won't work there. Check the current price on Amazon before deciding, and note the included 18-month coverage.
The RCA Wave-78 is the opposite philosophy. It's a pair of true wireless in-ear buds with a charging case, Bluetooth 5.2, touch controls and adaptive noise cancellation — everything on board, nothing to plug in. The audio side is a dynamic driver with a 20 Hz – 20,000 Hz frequency range, tuned per RCA for balanced sound with crisp highs and deep bass, and RCA labels it Hi-Res Audio. For music, gaming and calls, that's a familiar, well-rounded signature rather than an exotic one.
Battery is the headline number: up to 5 hours per charge, with the case bringing total playtime to about 20–22 hours. The case recharges over USB-C. The buds themselves are plastic and silicone, in red, with an ergonomic in-ear shape that RCA pitches for workouts, travel and long sessions — and they're sweat resistant, which is the detail that makes them a realistic gym companion. Touch controls handle playback and calls, and there's a built-in microphone.
Who should buy it: commuters, gym-goers and travelers who want no cable, a case that tops up the buds, and noise cancelling to take the edge off a noisy train or gym floor. Who should skip it: anyone chasing maximum resolution. Bluetooth and a 20 kHz ceiling mean these are convenient hi-res-flavored earbuds, not a bit-perfect wired chain. Price-check on Amazon; RCA positions these as an affordable everyday upgrade, not a flagship.
• Best for maximum resolution → Xumee USB C. 32-bit / 384 kHz decoding beats what Bluetooth earbuds can carry.
• Best for convenience and cable-free use → RCA Wave-78. No dongle, no wires, case included.
• Best for workouts → RCA Wave-78. Sweat resistant, in-ear, secure fit by design.
• Best for calls and inline control → Xumee USB C, as long as your phone doesn't already have a 3.5 mm jack.
• Best for battery life → RCA Wave-78. About 5 hours per charge and 20–22 hours total from the case; the Xumee has no battery at all because it draws from your phone.
• Best for travel → RCA Wave-78. A charging case in your bag is simpler than remembering a dongle.
• Best for existing wired headphone owners → Xumee USB C. It's the upgrade that unlocks gear you already own.
• Best for noise cancelling → RCA Wave-78. Adaptive noise cancellation is built in; the Xumee only reduces noise in the signal path.
In my opinion, the right pick depends entirely on whether you already own wired headphones. If you do, I'd buy the Xumee USB C — it's the only one of the two that actually delivers the hi-res numbers people mean when they say hi-res, and it's cheap insurance against a phone with no headphone jack. If you don't own wired headphones and want something you can wear out of the box, I'd buy the RCA Wave-78 for the case, the noise cancelling and the sweat resistance. For pure audio quality, my pick is the Xumee.
FAQ
what is hi res headphones
what is hi res audio headphones
It's the same idea applied to headphones: a set built to resolve more of the recording. The RCA Wave-78 lists a 20 Hz–20,000 Hz dynamic driver and Hi-Res Audio branding, which describes its tuning rather than a wired high-resolution data path.
what are hi res headphones
They're headphones marketed and designed for higher-fidelity listening — often paired with a DAC or high-bitrate source to actually benefit. Wired gear like the Xumee USB C plus good headphones is the more literal version; wireless buds like the Wave-78 are the convenient version.
which headphones support hi res lossless
Hi-res lossless typically requires a wired connection and a DAC that supports the higher sample rates — which is exactly what the Xumee USB C adapter provides at up to 32-bit / 384 kHz. Bluetooth earbuds like the RCA Wave-78 compress the signal in transit, so they don't carry true lossless.
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