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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 do-everything set of true wireless earbuds with LDAC hi-res audio, adaptive EQ and 40 hours of playback, choose boAt Launch Airdopes 800; if you need to turn a wired 3.5mm airplane seat or gym machine into a Bluetooth source your own headphones can use, choose Avantree Relay & SoundJet.
• boAt Launch Airdopes 800 — biggest strength: LDAC high-definition audio plus a 40-hour total playback figure, 4-mic AI-ENx calling, Adaptive EQ by Mimi and in-ear detection, all in a Bluetooth 5.3 true wireless package.
• boAt Launch Airdopes 800 — biggest trade-off: They are earbuds, so they only work with what they pair to; there is no 3.5mm jack and no transmitter mode, so they cannot broadcast audio to a second pair of headphones.
• Avantree Relay & SoundJet — biggest strength: It is a dedicated aptX Adaptive and aptX HD transmitter built on a Qualcomm chipset, and it can feed two Bluetooth headphones at once for 25 hours per charge.
• Avantree Relay & SoundJet — biggest trade-off: It is not an earbud and not a general-purpose adapter — the brand states it is not compatible with phones, car stereos or hearing aids, so it is really an in-flight and gym accessory.
• Who each pick is for: the boAt for someone who wants one pair of earbuds to cover music, calls and commuting; the Avantree for a traveller or gym-goer who already owns good Bluetooth headphones and wants to use them on a wired audio source.
The Airdopes 800 HiDef is built around one headline idea: high-definition audio from LDAC. LDAC compresses audio files more efficiently than AAC or SBC, so the output stays closer to what was originally generated. If you stream from a service or device that supports LDAC, that is the single biggest reason to pick these over a generic pair of budget buds. It is an aptX HD-adjacent story in spirit — the point is a higher-quality codec chain than the default — and boAt leans into it hard.
The rest of the spec list is unusually busy for this class. Four microphones with AI-ENx technology are there to strip background noise out of calls, which matters if you take meetings from a cafe, an airport lounge or a shared office. Adaptive EQ by Mimi adjusts the sound to your hearing profile, which is genuinely useful for dialogue in films and TV shows where you would otherwise keep nudging the volume. In-ear detection pauses when you pull a bud out and resumes when you put it back. Multipoint dual pairing keeps two devices connected at once. And ASAP Charging gives up to 200 minutes of playtime from a 10-minute top-up, which is the feature you will actually appreciate on a rushed morning.
On the hardware side you get a 10 mm dual driver setup, a balanced armature driver type, Bluetooth 5.3, active noise cancellation, app-based control, IPX5 water resistance and a Graphite Grey finish with a plastic or silicone case. The claimed average battery life is 40 hours.
Avantree Relay & SoundJet: Who It's For
The Relay & SoundJet R1 solves a completely different problem. It is a premium airplane Bluetooth adapter built on a Qualcomm chipset, and its whole job is to take audio from a 3.5mm AUX jack and transmit it over Bluetooth 5.3 to headphones you already own. Plug it into a seat-back entertainment jack, pair your AirPods, Bose or any other Bluetooth headphones, and you are watching the in-flight movie wirelessly.
Two things stand out. First, aptX Adaptive and aptX HD support — that is the "aptx hd earbuds" question answered from the transmitter side, because the adapter is what determines whether an aptX-capable headphone can actually receive a higher-quality stream. Second, dual headphone support: two Bluetooth headphones can connect at once with synced playback, which is exactly what you want when you are sharing a screen with someone on a long flight.
Battery life is quoted at 25 hours of continuous playback. LED indicators show connection status, and onboard buttons handle pairing and volume without digging through a menu. It is lightweight and pocket-sized, aimed at flights and gym sessions.
Who should buy it: frequent flyers, anyone who flies occasionally and hates airline headphones, and gym users stuck with cardio machines that only offer a 3.5mm socket. If you already own a decent pair of Bluetooth headphones, this is the cheapest way to make them work everywhere. Who should skip it: anyone hoping for a universal Bluetooth transmitter. Avantree states it is not compatible with phones, car stereos or hearing aids, so it is not the box you want for a TV, a car or a call setup. And if you do not already own Bluetooth headphones, this product gives you nothing to listen on.
Side-by-Side: Which Should You Choose?
• Best for hi-res codec listening → boAt Launch Airdopes 800. LDAC is the reason to buy it, and the 10 mm dual drivers plus Adaptive EQ round it out.
• Best for long playback figures → boAt Launch Airdopes 800. 40 hours claimed, with up to 200 minutes from a 10-minute ASAP charge.
• Best for sharing audio with a second person → Avantree Relay & SoundJet. Two Bluetooth headphones connected at once, perfectly synced.
• Best for calls → boAt Launch Airdopes 800. Four microphones with AI-ENx noise handling is a call-first design; the Avantree has no microphone story at all.
• Best for travel and gym bags → Avantree Relay & SoundJet. Lightweight, pocket-sized, 25 hours per charge, and it works on any 3.5mm socket it is cleared for.
• Best for everyday all-rounder use → boAt Launch Airdopes 800. ANC, in-ear detection, IPX5, multipoint and app control cover commuting, workouts and desk work.
• Best if you already own great headphones → Avantree Relay & SoundJet. It upgrades the headphones you have instead of replacing them.
In my opinion, the boAt Launch Airdopes 800 is the better buy for most people, because it is a complete listening product: LDAC audio, 4-mic calling, Adaptive EQ, ANC, in-ear detection and 40 hours of playback in one box. The Avantree Relay & SoundJet is excellent at a narrower job — aptX HD transmission from a 3.5mm jack to two pairs of headphones — and if you fly often or your gym equipment is wired, it is the smarter pick. Buy the boAt if you want earbuds; buy the Avantree if you want to keep the headphones you already love.
which earbuds support aptx hd
Neither product here is an earbud that lists aptX HD on its data sheet. The Avantree Relay & SoundJet supports aptX Adaptive and aptX HD as a transmitter, so it can send that higher-quality stream to aptX HD-capable headphones you pair with it. The boAt Launch Airdopes 800 lists LDAC as its high-definition codec instead.
It plugs into a 3.5mm AUX jack and streams to Bluetooth headphones, and it supports two headphones at once. The brand states it is not compatible with phones, car stereos or hearing aids. It is designed for airplane seat-back entertainment and similar wired audio sources.
The boAt Launch Airdopes 800 is quoted at 40 hours of average playback, with up to 200 minutes from a 10-minute ASAP charge. The Avantree Relay & SoundJet is quoted at 25 hours of continuous playback. Both figures come from the manufacturers' own specifications.
No. The data sheet lists no headphone jack — connectivity is Bluetooth only, version 5.3, with dual pairing so two devices stay connected at once. If you need a 3.5mm input, the Airdopes are not the product for that; the Avantree adapter is built around a 3.5mm source.
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