If you want wired headphones with a stated 20 Hz–20 kHz response and an 8-foot cord for side sleepers, choose Yamaha RH5MA; if you need a closed-back design intended to help limit microphone bleed, choose Tascam TH-300X.
Neither model is described as a Bluetooth or open-ear headphone, so neither is a direct match for shoppers seeking wireless, low-profile headphones for sleeping.
For studio tracking, the Tascam’s isolation makes the more purpose-specific case; for a straightforward wired setup, the Yamaha has the simpler spec sheet.
• Yamaha RH5MA strength: 8-foot oxygen-free copper cord, 1/8-inch plug, and 1/4-inch adapter; trade-off: the listed frequency response is 20 Hz–20 kHz.
• Tascam TH-300X strength: closed-back design intended to help prevent microphone bleed and feedback; trade-off: the sheet does not specify its cable length.
• Yamaha RH5MA is for: listeners who want a wired pair with stated compatibility across audio devices and two plug options.
• Tascam TH-300X is for: musicians and recording setups where closed-back isolation, plush leatherette pads, and an adjustable headband matter.
• For side sleepers: neither product is presented as a sleep-specific design, and the available details don’t establish that either will feel comfortable with an ear pressed against a pillow.
The Yamaha RH5MA is a wired studio monitor headphone with a stated 20 Hz–20 kHz frequency response and sensitivity of 96 dB/mW. Its 8-foot oxygen-free copper cord gives a user some reach between the headphones and an audio source. The included 1/8-inch plug and 1/4-inch adapter also cover two common connection formats, and Yamaha lists compatibility with all audio devices.
That straightforward setup may suit someone switching between consumer audio equipment and gear with a 1/4-inch headphone connection. The long cord can also be useful when the listening position is not right beside the source. For a buyer comparing studio headphones rather than sleep accessories, these are practical, clearly stated features.
I would skip the RH5MA if your deciding factor is a specified closed-back isolation design, because that detail is not included in its listed features. I would also avoid treating it as a side-sleeping pick: the available information does not describe a low-profile shape, Bluetooth, or a sleep-focused fit. The specs provide a frequency range, sensitivity, and connection details, but no basis for claiming it will be comfortable when lying on an ear.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 6 min read · Independent comparison
The Tascam TH-300X is an over-ear, wired studio headphone with a closed-back design. Tascam describes that enclosure as useful for limiting microphone bleed and feedback, making the TH-300X the more clearly targeted option for tracking or live use where sound escaping from the headphones could affect a nearby microphone. Its driver is listed as dynamic, with a frequency range of 10 Hz–26 kHz.
The trade-off is that its spec sheet does not state a cable length or sensitivity figure, so shoppers who need those specifics cannot compare them directly with the Yamaha’s stated details. And while the ear pads are described as plush, that does not establish comfort for sleeping on your side. The over-ear shape and closed-back construction are studio-oriented; the listing does not identify this as a sleep headphone.
• Best fit for recording near a microphone → Tascam TH-300X. Its closed-back design is specifically intended to help reduce microphone bleed and feedback.
• Best for a stated longer cord → Yamaha RH5MA. Its 8-foot oxygen-free copper cord is a concrete advantage if your audio source is farther away.
• Best if you want both plug formats included → Tie. Yamaha lists a 1/8-inch plug and 1/4-inch adapter; Tascam includes an adapter to connect its 1/8-inch jack to 1/4-inch equipment.
• Best for the broader stated frequency range → Tascam TH-300X. Its listed range is 10 Hz–26 kHz, compared with the Yamaha’s 20 Hz–20 kHz. That specification alone does not prove which one will sound better to you.
• Best when sensitivity is a deciding spec → Yamaha RH5MA. Its sensitivity is listed as 96 dB/mW; the Tascam sheet provides no corresponding figure.
• Best for an explicitly described adjustable headband and plush pads → Tascam TH-300X. Those comfort features are stated, though they do not guarantee a good fit for every listener.
• Best for side sleepers seeking Bluetooth headphones → Neither. Both are described as wired, and neither is presented as a low-profile or sleep-specific model.
• Best for someone searching for “with microphone open ear earbuds for side sleepers” → Neither. These are over-ear or studio headphones, not open-ear earbuds, and neither sheet specifies a built-in microphone.
The phrases shoppers use can point to very different products. Someone searching for “memory foam ear cushions bluetooth headphones for side sleepers” is looking for features not listed for either model: Bluetooth, memory foam, and a sleep-friendly profile. Likewise, the query “best head phones for side sleepers” calls for comfort information these spec sheets do not provide. For those needs, I would keep looking rather than infer a suitable sleeping fit from studio features.
In my opinion, I would choose the Tascam TH-300X for studio tracking because its closed-back design is explicitly intended to help limit microphone bleed and feedback.
I would choose the Yamaha RH5MA instead if an 8-foot cord and a stated sensitivity figure matter more to my setup.
For side sleepers, I would buy neither on the strength of these details alone: neither is described as Bluetooth, open-ear, or designed for sleeping on your side.
The Tascam TH-300X has the clearer recording-specific advantage: its closed-back design is intended to help prevent microphone bleed and feedback. The Yamaha lists general compatibility, a frequency response, sensitivity, and cable details, but no comparable isolation feature.
A wider stated range does not, by itself, establish which headphone will sound better; the available information does not provide a direct listening comparison.
Neither is identified as a sleep headphone. Both are wired studio models, and the information provided does not establish a low-profile design or comfort when lying on your side.
Tascam specifically lists plush leatherette ear pads and an adjustable headband, making its comfort features clearer on paper. That description does not guarantee a personal fit, and the Yamaha’s listed details do not provide equivalent information about padding or adjustment.
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