If you want detailed, wide-range wired monitoring for exercise, choose SONY MDR-M1ST; if you need a foldable, noise-isolating studio headphone, choose Sony MDR-7506. Neither is a true wireless workout set: both are over-ear wired headphones, so the cable matters when you move.
For exercise, I’d lean toward the MDR-M1ST only if your routine is controlled and you specifically want its stated monitoring design and broad frequency response. The MDR-7506 makes more sense for studio or broadcast work, travel, and listening in places where its closed-ear design can help reduce outside noise.
• SONY MDR-M1ST: Its 5–80,000 Hz frequency response and 24-ohm impedance are its standout figures; the trade-off is a 2.5-meter wired cable and no stated folding design.
• Sony MDR-7506: Its closed-ear design, folding construction, and included soft case suit studio work and travel; the trade-off is a non-detachable cord and a listed 10 Hz–20 kHz frequency range.
• Choose the MDR-M1ST if you want a wired monitor headphone built around detailed sound reproduction and can manage a long cable.
• Choose the MDR-7506 if you want a foldable closed-ear headphone for studio, broadcast, or travel use.
• Neither is a sensible match for someone specifically looking for clip on earbuds for exercise or the best true wireless earbuds for exercise.
The MDR-M1ST is an over-ear, sealed dynamic headphone with a 40 mm driver and a listed frequency response of 5–80,000 Hz. Its 24-ohm impedance and 103 dB/mW sensitivity are useful points to consider when matching it with a listening source. The product is positioned as a monitor headphone focused on presenting music clearly, including the balance between midrange, bass, treble, and the placement of sounds in a recording.
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-09 · 6 min read · Independent comparison
That makes it the more compelling choice for someone who wants to pay attention to a mix rather than simply put on headphones and tune out. The wide stated frequency range is a product specification, not a promise that every listener or source will reproduce or perceive sound across that entire span. Still, paired with its monitor-focused design, it gives the MDR-M1ST a clear identity: a wired headphone for close listening and audio work.
For exercise, the cable is the practical catch. Its listed length is 2.5 meters, which can be awkward during running, gym circuits, or any activity with frequent movement. The available specifications also don’t describe folding or a carrying case. I’d consider it for stationary listening, editing, or controlled workouts where the cable can stay clear; I’d skip it if freedom of movement is the priority.
The MDR-7506 is also an over-ear wired headphone with 40 mm dynamic drivers, but its defining features are a closed-ear design and a foldable build. It is described for professional studio and live or broadcast use. Its frequency response is listed as 10 Hz–20 kHz, and its impedance is 63 ohms.
That combination makes it a straightforward fit for people who want a familiar style of wired monitor headphone for focused listening or production work. The closed design is specified to reduce external noise, which can be useful in a studio or other listening environment where distractions matter. It also folds for storage and comes with a soft case, so packing it away is easier than with a headphone that has no stated folding feature.
The cable is not detachable, and the product information gives two different cord-length descriptions: one says 8 feet, while another says 9.8 feet. Either way, it is a wired headphone with a substantial cable to manage. That is not ideal for movement-heavy exercise. I’d choose it for studio tasks, broadcast use, or travel rather than for running or a workout where a trailing cord could get in the way.
• Best fit for detailed monitor listening → SONY MDR-M1ST. Its listed range extends from 5 Hz to 80,000 Hz, and its description emphasizes hearing the balance and placement of elements in a recording.
• Best fit for studio or broadcast work → Sony MDR-7506. It is explicitly described for professional studio and live or broadcast applications.
• Best stated frequency-range span → SONY MDR-M1ST. Its specification is 5–80,000 Hz, compared with 10 Hz–20 kHz for the MDR-7506. A wider listed range alone doesn’t establish that one will sound better to every listener.
• Best for folding and storage → Sony MDR-7506. It folds for storage or travel and includes a soft case.
• Best for a lower listed impedance → SONY MDR-M1ST. Its impedance is 24 ohms, versus 63 ohms for the MDR-7506. That is a specification difference, not a guarantee of better compatibility with every device.
• Best for a stated noise-reduction design → Sony MDR-7506. Its closed-ear construction is described as reducing external noise; the MDR-M1ST’s listed noise control is none.
• Best for exercise with lots of movement → neither. Both are wired over-ear models, and the MDR-M1ST’s cable is listed at 2.5 meters. A dedicated wireless or compact exercise design is a better match for that need.
• Best for buyers considering kids headphones for exercise → neither based on these details alone. Both are described as adult over-ear headphones, and neither sheet identifies an exercise-specific fit or wireless setup.
I’d buy the SONY MDR-M1ST if my priority were careful, wired monitoring and I valued its stated frequency range and 24-ohm impedance.
For exercise, though, I would not call either model a convenient all-purpose pick: both have cables, and the MDR-M1ST’s is 2.5 meters long.
If I wanted a headphone for studio or broadcast use that folds for storage, I’d choose the MDR-7506 instead.
My overall choice is the MDR-M1ST for focused listening, not because its specifications make it a purpose-built workout headphone.
Neither is designed as a true wireless exercise option in the supplied specifications. Both are wired over-ear headphones, and the MDR-M1ST has a listed 2.5-meter cable. For workouts with lots of movement, that cable is a meaningful drawback.
The MDR-7506 is described as having a closed-ear design that reduces external noise. The MDR-M1ST lists no noise control, so the MDR-7506 has the clearer stated advantage for listening in a distracting setting.
Not on its own. The MDR-M1ST lists 5–80,000 Hz, while the MDR-7506 lists 10 Hz–20 kHz, but a frequency-range figure does not settle which headphone will sound better to a particular listener or work better with a particular source.
The MDR-7506 has the more travel-friendly design on paper: it folds and includes a soft case. The MDR-M1ST’s product details do not specify a folding design or included case.
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