If you want a dedicated TV-listening setup with a charging dock and up to 130 feet of open-field range, choose SEREONIC WH100; if you need up to 40 hours of listening and Bluetooth 5.4, choose Asixxsix Headphones. For side sleepers, the main question is whether either design suits how you want to listen: SEREONIC is over-ear, while Asixxsix is listed as in-ear.
Neither is described as an open-ear model, and the available specs do not establish that either one is especially suited to sleeping on your side. The clearest difference is the wireless system and the trade-off between SEREONIC’s dedicated RF setup and Asixxsix’s longer stated battery life.
• SEREONIC WH100: Its dedicated UHF/RF transmitter, charging dock, and up to 130 feet of open-field range suit TV listening around the home. The trade-off is up to 8 hours of listening at 50% volume.
• Asixxsix Headphones: Its up to 40-hour battery life, Bluetooth 5.4, and 2.4GHz wireless give it more connection options. The trade-off is a stated range of at least 30 meters, shorter than SEREONIC’s open-field figure.
• SEREONIC connection options: The transmitter supports 3.5mm analog and optical/coaxial digital audio. The headphones also have a wired 3.5mm connection.
• Asixxsix connection options: The included base connects through optical or AUX, and Bluetooth is available when the TV supports it. Its setup depends on the TV’s available connection options.
• Choose SEREONIC for: A focused TV-listening arrangement with a charging dock, physical volume control, and RF transmission.
• Choose Asixxsix for: Longer stated playback and a choice of Bluetooth or transmitter-based listening.
SEREONIC WH100 is an over-ear wireless TV headphone system built around a transmitter and charging dock. The transmitter accepts 3.5mm analog audio as well as optical or coaxial digital audio, so it can fit a TV setup with compatible outputs. Its UHF/RF connection has three selectable channels, and the listed receiver range is up to 130 feet in an open field.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-20 · 6 min read · Independent comparison
Side sleepers should pay close attention to the over-ear design. It is not described as a low-profile sleep headphone, so I would not choose it on the assumption that it will feel comfortable with an ear pressed against a pillow. If your priority is an open-ear design, this is not described as one either. I would skip SEREONIC if long battery life is the deciding factor or if you specifically want an in-ear fit.
Asixxsix Headphones are listed as in-ear and include a transmitter base, optical cable, 3.5mm cable, and USB power cable. The connection options include 2.4GHz wireless and Bluetooth 5.4. For TV use, the base can connect through optical or AUX; Bluetooth is another option if the TV supports it. The product also supports connecting two headphones, which may suit a household where two people want to listen together.
The strongest stated advantage is battery life: up to 40 hours per charge. The headphones recharge by being placed on the transmitter base, rather than by connecting a charging cable directly to the headphones. The listed wireless range is at least 30 meters, and the product information gives latency below 40 milliseconds. Those details make it a strong candidate for someone who wants longer listening between charges and more than one way to connect.
For side sleepers, the in-ear listing may sound more promising than an over-ear shape, but it does not establish how the headphones feel against a pillow or whether they stay comfortable during sleep. They are not described as open-ear headphones. I would consider them if you want an in-ear fit and long stated playback, but skip them if you need verified sleep-specific comfort or a TV setup that cannot connect through the included base or supported Bluetooth.
Side-by-Side: Which Should You Choose?
• Best for longer stated battery life → Asixxsix Headphones. They list up to 40 hours per charge, compared with SEREONIC’s up to 8 hours at 50% volume.
• Best for a dedicated RF TV setup → SEREONIC WH100. Its UHF/RF transmitter has three channel selections and a stated open-field range of up to 130 feet.
• Best for Bluetooth 5.4 → Asixxsix Headphones. Bluetooth is available when the TV supports it, alongside 2.4GHz wireless through the base.
• Best for two listeners using compatible headphones → Asixxsix Headphones. The listed feature set supports connecting two headphones.
• Best fit to consider for side sleeping → Asixxsix, with an important caveat. It is listed as in-ear, while SEREONIC is over-ear; neither product’s listed details confirm side-sleeping comfort.
• Best for a straightforward charging dock routine → Either, for different reasons. Both include a base or dock for charging; Asixxsix also states up to 40 hours of battery life, while SEREONIC specifies about 3 hours to recharge.
• Best if you want open-ear headphones for side sleepers → Neither based on the listed design. SEREONIC is over-ear and Asixxsix is in-ear; neither is identified as open-ear.
People searching for the best sweat resistant in ear headphones for side sleepers should note that neither product’s listed details specify sweat resistance. Likewise, the phrase best bluetooth headset for side sleepers points toward Asixxsix’s Bluetooth option, but Bluetooth connectivity alone does not confirm comfort for sleeping on your side. If sleep comfort is the deciding factor, the stated design details leave a real unanswered question.
I would choose Asixxsix Headphones if I were choosing between these two for side sleepers, mainly because the in-ear design is a more plausible starting point than SEREONIC’s over-ear fit, and the stated battery life is much longer. That is a design-based judgment, not a guarantee of comfort against a pillow.
For TV listening where RF range and a dedicated transmitter matter more than long playback, I would choose SEREONIC instead. But for a side sleeper deciding between these particular options, Asixxsix is my pick—with the caveat that neither is confirmed as sleep-specific or open-ear.
FAQ
Asixxsix is listed as in-ear, while SEREONIC WH100 is over-ear, so Asixxsix is the more plausible starting point for side sleeping. Neither product’s listed details confirm comfort when lying on a pillow.
Both include a transmitter base for TV audio. SEREONIC supports 3.5mm analog and optical/coaxial digital audio; Asixxsix’s base connects through optical or AUX.
Asixxsix supports Bluetooth 5.4, provided the TV supports Bluetooth. SEREONIC is described as an RF wireless system and also has a 3.5mm wired connection; its listed details do not identify Bluetooth as its wireless method.
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