If you want over-ear headphones for home recording and flexible listening, choose Shure SRH440; if you need a USB headset for calls with a built-in microphone, choose Cyber Acoustics AC-840. For side sleepers, though, neither is an obvious fit: both sit over the ear, so their headband-and-earcup designs may press against a pillow. These two make more sense for different daytime jobs than for sleeping.
• Shure SRH440: Its closed-back, around-ear design, extended 10 Hz–22 kHz frequency range, and detachable coiled cable suit home and studio recording. The trade-off is that it is a wired over-ear headphone, not a compact sleep option or a headset with a microphone.
• Cyber Acoustics AC-840: Its USB connection, mono format, adjustable headband, and noise-canceling microphone make it practical for calls and classroom or office use. The trade-off is that its single-ear communication focus is less suited to music listening than a stereo headphone.
• Choose the SRH440 if listening detail and a recording-oriented design matter most.
• Choose the AC-840 if you need a straightforward wired headset for computer calls, with volume and mute controls close at hand.
• For side sleepers: neither sheet describes a sleep-specific or in-ear design, so shoppers seeking the best headband headphones for side sleepers may want to look beyond these two.
The SRH440 is designed for home and studio recording, and its features lean toward focused listening rather than calls. It has a closed-back, circumaural design: the earcups go around the ears, and the headphone’s sound-isolating approach can help make listening feel more contained in a home or recording space. Its stated frequency range is 10 Hz to 22 kHz, which is broader at both ends than the AC-840’s listed range. That specification describes the range it is designed to reproduce; it does not, by itself, establish how a particular recording will sound.
The wired connection ends in a 6.35 mm jack, and the included threaded 1/4-inch adapter supports compatible equipment with that connection. The coiled cable is detachable, which gives the setup a different kind of flexibility from the AC-840’s USB lead: it can be removed from the headphones rather than treated as a permanently attached part. The collapsible design and included carrying bag also make storage and transport more manageable for someone moving between a home setup and another listening space.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
I would consider the SRH440 for someone who wants an around-ear headphone for recording, monitoring, or deliberate listening, and who does not need a built-in microphone. Its 1.6-pound listed weight is worth keeping in mind for long sessions or anyone sensitive to heavier headgear. Skip it if you need a USB headset with an integrated call microphone, or if you want something described as suitable for sleeping on your side.
The AC-840 has a clearer everyday job: computer-based communication. It is a mono USB headset with a unidirectional noise-canceling microphone, so its design prioritizes sending your voice through calls or speech applications rather than providing a full stereo listening setup. The microphone is intended to help with speech in less-than-ideal environments, but that is not the same as active noise cancellation for the listener. The listed noise-control type is passive noise cancellation.
Its USB connection is intended for standard USB ports and is described as plug-and-play for Windows PCs, Macs, and Chromebooks. That can make it a practical choice for a desk, classroom, or shared work area where a familiar wired connection and simple setup matter. The in-line controls put volume and microphone mute within reach, so adjusting call audio or muting your voice does not require reaching for a separate control device.
The headband is adjustable, the ear cushion is soft leatherette, and the boom arm can be positioned for either side. Those are useful practical details for a headset that may be worn during work or school tasks. The AC-840 is listed at 0.09 kg, substantially lighter than the SRH440’s listed weight, though comfort still depends on an individual’s fit and sensitivity. Skip it if your main goal is stereo music listening, a detachable coiled cable, or a headphone designed for side-sleeping.
• Best for home or studio recording → Shure SRH440. Its stated purpose is recording, and its closed-back, around-ear design is built around listening rather than voice communication.
• Best for computer calls → Cyber Acoustics AC-840. It includes a unidirectional noise-canceling microphone and a USB connection intended for common computer systems.
• Best for a wider listed frequency range → Shure SRH440. Its range is 10 Hz to 22 kHz, compared with 20 Hz to 20,000 Hz for the AC-840. Treat that as a specification difference, not a guarantee of perceived sound quality.
• Best for quick mute and volume adjustments during a call → Cyber Acoustics AC-840. Its controls are in-line, including a microphone mute function.
• Best for a detachable cable and included 1/4-inch adapter → Shure SRH440. Those details suit a recording setup where connection type and cable handling matter.
• Best for a lighter listed headset design → Cyber Acoustics AC-840. It is listed at 0.09 kg, while the SRH440 is listed at 1.6 pounds.
• Best for sleeping on your side → Neither is a clear match. Both are over-ear designs, and neither product sheet identifies an in-ear or sleep-specific form. Someone searching for the best in ear earbuds for side sleepers should compare products designed around a smaller ear-level profile instead.
• Best noise-canceling headset for side sleepers → Neither based on these details. The AC-840’s noise-canceling microphone is for voice capture, not a claim that the headset cancels surrounding sound for the wearer. The SRH440 is described as having sound isolation, not active noise cancellation.
I would choose the Shure SRH440 if I wanted a wired, around-ear headphone for recording and focused listening. Its recording-oriented design, detachable coiled cable, and included adapter give it a more specific listening role than the mono call headset.
For side sleepers, I would buy neither as a sleep solution: both sit over the ears, and neither is presented as sleep-focused. My recommendation is the SRH440 for recording, not as the best headband headphones for side sleepers.
First, decide whether you need to hear or speak. The SRH440 is the clearer choice for listening and recording; the AC-840 is the clearer choice for calls, thanks to its microphone, mute control, and USB connection. Choosing by the task matters more than comparing the product names alone.
Next, check the connection your setup requires. The SRH440 uses a 6.35 mm jack and includes a threaded 1/4-inch adapter. The AC-840 connects through USB and is intended for standard USB ports on Windows PCs, Macs, and Chromebooks. If your device or recording equipment uses a different connection, confirm compatibility before choosing.
Fit deserves equal attention if you plan to wear either for long stretches. The AC-840 has an adjustable headband and leatherette cushion, while the SRH440 is an around-ear model with a listed weight of 1.6 pounds. Those facts help distinguish their designs, but they cannot predict comfort for every head or ear. For overnight use, neither sheet supplies the kind of low-profile design information a side sleeper would want.
Finally, don’t treat microphone noise cancellation, passive noise control, and sound isolation as interchangeable. The AC-840’s noise-canceling description applies to its microphone, which is intended to capture speech in less-than-ideal surroundings. Its wearer-side noise control is listed as passive. The SRH440 is described as sound-isolating, which is a different design claim. If you are shopping specifically to block noise while sleeping, neither set of features establishes that either product is a dedicated noise-canceling sleep headset.
The AC-840 is the call-oriented option. It has a unidirectional noise-canceling microphone, a USB connection, and in-line volume and mute controls. The SRH440’s listed features focus on recording and listening, and do not include a microphone.
Which one is better for music and studio listening?
The SRH440 is the more direct fit for home or studio recording and listening. It is a closed-back, around-ear headphone with a listed frequency range of 10 Hz to 22 kHz. The AC-840 is a mono headset designed around communication.
Neither is an obvious side-sleeping pick from the information provided. Both are over-ear designs, and neither is described as low-profile, in-ear, or made for sleep. Pillow pressure is a practical concern to consider with either style.
No. The AC-840’s noise-canceling feature is described as part of its microphone, which is intended to help with voice capture. Its wearer-side noise control is listed as passive noise cancellation; that does not establish active cancellation of surrounding sound.
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