If you want an open, wired headphone for spacious listening and gaming, choose Sennheiser HD 599; if you need wireless earbuds with active noise cancellation and call-focused features, choose Technics Hi-Fi True. For calls, the Technics has the clearer spec-based case: eight microphones and voice-noise reduction. The HD 599 is the better fit if you value an open sound and a wired connection over pocketable convenience.
• Sennheiser HD 599 — strength: Open over-ear design and spacious sound; trade-off: wired, with no active noise cancellation.
• Technics Hi-Fi True — strength: Wireless call features, active noise cancellation, and three-device multipoint; trade-off: earbuds need a snug fit for proper sound and noise cancellation.
• Choose the HD 599 for home listening, gaming, or a roomy presentation from wired headphones.
• Choose the Technics for calls, commuting, and switching among a computer and mobile devices.
• For call-focused wireless convenience, I’d pick Technics; for an open wired listening setup, I’d pick Sennheiser.
The HD 599 is an open-back, over-ear wired headphone built around a roomy, natural listening presentation. Its open design lets air circulate around the ears and gives music, voices, and in-game cues a sense of space. That can be appealing for relaxed listening at home or at a desk, where a broad soundstage matters more than blocking out surrounding noise.
It also makes sense for someone who wants one wired headphone for music, computer use, and gaming. The listed compatibility covers phones, tablets, computers, and many other audio devices, while the product description highlights detailed spatial presentation for games and mixing. That does not make it a wireless gaming headset: the HD 599 is wired, and the supplied information does not identify a built-in microphone or call-specific voice processing.
I’d skip it if you need earbuds that fit in a pocket, active noise cancellation, or a dedicated set of call features. The open design is also a poor match when you need to shut out a noisy environment: it prioritizes a natural, spacious presentation, not isolation. If your daily routine involves moving between calls on a computer and phone, the lack of wireless multipoint is a meaningful limitation.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-19 · 6 min read · Independent comparison
The Technics Hi-Fi True is a wireless in-ear option for someone who puts portability, call clarity, and device switching high on the list. Its JustMyVoice system uses eight high-sensitivity microphones and noise reduction to help transmit speech clearly.
For listening, Technics combines a 10-millimeter dynamic driver with active noise cancellation and LDAC compatibility. The case supports Qi wireless charging, and the stated battery life is up to seven hours per charge, with up to 24 hours with the case when noise cancellation is on. Those figures give a useful sense of the intended routine: use the earbuds through the day, then recharge them in the case. Actual fit and use can affect how well noise cancellation and acoustics work, so a secure, snug fit matters.
I’d pass on the Technics if you specifically want an open over-ear soundstage or a wired connection. It is an earbud design, not a substitute for the HD 599’s spacious presentation. Fit is also part of the experience: the product information says that an incorrect fit can weaken noise cancellation or sound quality. These are better suited to someone willing to find the right ear tip fit than to someone who wants headphones that simply rest around the ears.
• Best for calls → Technics Hi-Fi True. Its eight microphones and voice-noise reduction are the clearest call-specific features in this comparison. The HD 599’s supplied specifications do not list a microphone system.
• Best for an open, spacious listening presentation → Sennheiser HD 599. Its open over-ear design is intended to create a broad, relaxed sense of space.
• Best for active noise cancellation → Technics Hi-Fi True. It has active noise cancellation; the HD 599 lists passive noise control and uses an open design.
• Best for a wired desk or home setup → Sennheiser HD 599. Choose it if you want a direct wired headphone and do not need Bluetooth or a charging case.
• Best for switching between work and personal devices → Technics Hi-Fi True. Three-device multipoint is useful when calls and media move between a computer and mobile devices.
• Best for gaming cues in an open headphone format → Sennheiser HD 599. Its spatial presentation is a natural fit for hearing the placement of in-game sounds, though it is not described as a wireless gaming headset.
• Best for charging without a cable at the case → Technics Hi-Fi True. Its case supports Qi wireless charging, alongside its Bluetooth connection.
• Best for someone who dislikes earbuds in the ear → Sennheiser HD 599. The Technics requires a comfortable, secure in-ear fit; the Sennheiser sits over the ears instead.
The two products solve different problems, so the deciding factor is less about which has more features overall and more about the kind of listening setup you want. The HD 599 gives up wireless convenience and active noise cancellation in favor of an open, wired format. The Technics gives up that over-ear soundstage in exchange for portability, noise reduction, and call-oriented controls.
The same trade-off applies to searches for “sleep headphones for calls.” Neither product is specifically described as a sleep headphone, so I wouldn’t treat either as purpose-built for sleeping. The Technics is compact and wireless, but it still sits in the ear; the Sennheiser is an over-ear headphone and may not suit lying on a pillow. Choose based on how you plan to wear it, not on an assumption that either has a sleep-specific design.
For someone searching for “usb c charging bluetooth earbuds for calls,” the Technics matches the wireless-earbud and call-feature parts of that need. However, the supplied details identify Qi wireless charging for its case and do not specify USB-C charging. I would not assume a particular wired charging connector from the available information.
My Verdict
In my opinion, I’d buy the Technics Hi-Fi True for a call-first routine. Its eight microphones, voice-noise reduction, active noise cancellation, and multipoint connection address practical needs that the HD 599’s listed features do not. For calls across a computer and phone, that is the more convincing package. I’d choose the Sennheiser instead if my priority were open, spacious listening at home rather than wireless call convenience.
The Technics is the more call-focused option in the supplied specifications. It includes eight microphones and JustMyVoice noise reduction. The HD 599 is described as a wired open headphone, with no call-specific microphone system listed.
Does the Sennheiser HD 599 have noise cancellation?
The listed noise control for the HD 599 is passive, and its open-back design is intended for spacious listening rather than active isolation. The Technics has active noise cancellation, though a secure fit is important for it to work as intended.
For spatial cues in an open headphone format, the HD 599 has the stronger fit: its sound presentation is described as precise and spacious for games. If gaming calls and wireless device switching matter more, the Technics has the more explicit call features, but the supplied information does not describe it as a gaming headset.
If USB-C is essential, check the current product information before choosing.
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