How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want one box that turns a TV, PC or stereo into a long-range Bluetooth source you can walk around the house with, choose miccus Long Range; if you need a pocket transmitter for in-flight entertainment that keeps two headphones fed for a long-haul flight, choose Avantree Relay & SoundJet.
• miccus Long Range — biggest strength: seriously long wireless reach, rated up to 300 ft outdoors and 160 ft indoors, plus aptX Low Latency so audio and picture stay together while you watch.
• miccus Long Range — biggest trade-off: it works only one direction at a time (transmit or receive, never both), it is audio-only Bluetooth, and Wi-Fi interference can shrink that range unless you set the link up with Wi-Fi temporarily off.
• Avantree Relay & SoundJet — biggest strength: a travel-first design with aptX Adaptive, two headphones paired at once, and up to 25 hours of playtime on one charge.
• Avantree Relay & SoundJet — biggest trade-off: it is a transmitter only and is explicitly not compatible with TVs, hearing aids, musical instruments, phones or tablets — so it cannot double as a home audio hub.
• Who each pick is for: miccus for the living room, bedroom, garage or backyard; Avantree for the seat-back screen in front of you.
This is a home audio problem-solver. The pitch is simple: your TV, PC or stereo has an audio output, and you want that sound in Bluetooth headphones or speakers without sitting two feet from the screen. It takes digital optical (TOSLINK), 3.5mm stereo and RCA inputs, so most TVs and older stereos can feed it. From there it broadcasts to your headphones, and the reach is the headline number — up to 160 ft indoors and 300 ft outdoors.
The dual-link feature is the part that quietly matters most for households. You can connect two headphones at once, and each one has its own volume, controlled on the headphone side rather than on the transmitter. That means one person can listen loud while another keeps it quiet, which is genuinely useful for late-night viewing or a partner who wants the dialogue boosted. It also plays nicely alongside a soundbar, so the room keeps its normal speakers while you go wireless on the side.
Skip it if you want a transmitter for plane seat-back screens, or if you need anything other than audio over Bluetooth. It is an audio-only device, and pairing trouble with phones or tablets is best solved by putting those devices in airplane mode first.
Avantree Relay & SoundJet: Who It's For
This is the opposite kind of product: narrow, deliberate, and built around one scenario. It is an airplane Bluetooth adapter. You plug into the in-flight entertainment jack, pair your headphones, and watch without a cable tethering you to the seat. The Qualcomm chipset with aptX Adaptive is there to keep the audio balanced and the connection steady across a flight, and two headphones can be paired at once — the couple-or-travel-buddy use case stated plainly in the feature list.
The 25 hours of playtime on a single charge is the spec that makes it make sense. That comfortably covers long international itineraries where you may not have a convenient place to recharge, and it means you are not budgeting battery anxiety on top of jet lag.
The trade-offs are equally clear, and Avantree states them rather than hiding them. It is a transmitter only. It does not pair with phones or tablets. It is not compatible with TVs, hearing aids or musical instruments. So it is not a home-theatre accessory, not a practice-room gadget, and not a hearing-aid companion. It also gives you no published indoor or outdoor range figure the way miccus does — because range is not the point; a metre of cabin aisle is.
Buy it if your pain point is the airplane jack and you want two people listening at once. Skip it if you want something that also serves your TV at home, because it will not.
Side-by-Side: Which Should You Choose?
• Best for airplane seat-back entertainment → Avantree Relay & SoundJet. That is its stated purpose, and it does not pretend to be anything else.
• Best for watching TV and movies with two people → miccus Long Range. Dual-headphone support with independent volume per headphone, plus aptX Low Latency for lip-sync.
• Best for a long flight without recharging → Avantree Relay & SoundJet. Up to 25 hours on a single charge.
• Best for connecting to a TV, PC or stereo → miccus Long Range. Optical, 3.5mm and RCA inputs, with voice prompts and LED indicators to walk you through setup.
• Best for travel-partner audio sharing → Avantree Relay & SoundJet. Two headphones at once, pitched directly at couples and travel partners.
• Best for low-latency gaming → miccus Long Range, provided your headphones also support aptX Low Latency. If they do not, expect standard Bluetooth latency.
• Best for someone who wants one device to do everything → neither. miccus is one direction at a time and audio-only; Avantree is a transmitter only and excludes TVs, phones and hearing aids.
In my opinion, most people searching this comparison should buy the miccus Long Range. It covers the everyday, year-round scenario — TV, PC, stereo, two headphones, long reach, optical and analogue inputs — and the aptX Low Latency support is the feature that keeps movies watchable. The Avantree Relay & SoundJet is the better buy only if you fly often and specifically want two people sharing a seat-back screen with 25 hours of runtime; for that job it is the more focused tool. Buy for the scenario you actually live in, and check the current price on Amazon before you commit.
FAQ
which earbuds support aptx hd
Check your specific model's spec sheet, because this varies by brand and generation. What the data here tells you is that miccus Long Range supports SBC, AAC, aptX and aptX-LL, while Avantree Relay & SoundJet uses Qualcomm aptX Adaptive. For no-lag TV audio on the miccus, your paired headphones must also support aptX Low Latency.
It is built for TVs, PCs and stereos, and it needs an audio output plus a power source over USB. For a seat-back entertainment jack, the Avantree Relay & SoundJet is the purpose-built option — it is an airplane adapter with up to 25 hours of playtime.
No. Avantree states it is not compatible with TVs, hearing aids or musical instruments, and it is a transmitter only that does not pair with phones or tablets. If you want Bluetooth audio from your TV, the miccus Long Range is the one with optical, RCA and 3.5mm inputs.
Only the miccus Long Range offers a receive mode — but note it transmits or receives, never both at the same time. The Avantree Relay & SoundJet is transmit-only by design, so it cannot act as a receiver.
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