If you want simple, lightweight wired headphones for exercise, choose Sony ZX Series; if you need on-ear headphones with an adjustable fit and in-line volume control, choose Koss KTXPro1. Neither model offers Bluetooth, so both require a wired connection during a workout. For most exercise routines, I’d lean toward the lighter Sony; the Koss makes more sense if easy volume adjustment and a flexible headband matter more.
• Sony ZX Series: A 120 g, wired on-ear design with padded ear cups; the trade-off is that it has no Bluetooth and no listed in-line volume control.
• Koss KTXPro1: On-ear headphones with an adjustable headband, soft head sling, and in-line volume control; the trade-off is a 60-ohm impedance and a wired-only connection.
• Both use a standard 3.5 mm jack, so they suit compatible devices but do not offer wireless freedom.
• Sony’s 30 mm dynamic drivers and 12 Hz–22 kHz range make it the straightforward lightweight pick; Koss lists titanium-coated drivers and a 15 Hz–25,000 Hz range.
• Choose Sony if low weight and a simple wired setup are your priorities; choose Koss if you want adjustable fit and on-cable volume control.
Sony ZX Series is the more straightforward option for someone who wants uncomplicated on-ear headphones. Its listed weight is 120 g, and the padded ear cups add cushioning around the ears. That combination gives it a practical case for exercise sessions where you want to keep your gear light and avoid managing a wireless connection. The 30 mm dome drivers, neodymium magnets, and 12 Hz–22 kHz frequency range describe the audio hardware, though those figures alone cannot tell you how the headphones will sound to your ears.
Its 3.5 mm jack makes the connection simple when your phone, music player, or other device has a compatible headphone port. The flip side is just as important: Sony lists these as wired headphones, with no Bluetooth and no noise control. If your exercise device lacks a headphone jack, you would need a compatible way to connect them. The sheet also does not list an in-line volume control, so don’t choose them expecting that feature.
How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 7 min read · Independent comparison
In my view, Sony is the more natural fit for someone who values low weight and a minimal setup over workout-specific controls. That may also make it worth considering for older kids who can use a wired connection and prefer a light pair, though the listing describes the age range as adult. Skip Sony if you need Bluetooth, noise control, or a documented on-cable volume adjustment.
Koss KTXPro1 takes a more adjustable approach to an on-ear fit. Its soft, flexible head sling and adjustable headband give you more ways to settle the headphones in place, while the plush foam cushions provide padding. For a buyer who finds a fixed-feeling headband inconvenient, those design details are meaningful. They do not guarantee a particular fit for every head, but they give the Koss more adjustment features to work with than the Sony details listed here.
The Koss also includes an in-line volume controller, which can be useful when your device is tucked away during a walk or exercise session. Like Sony, it connects through a standard 3.5 mm plug and has no listed Bluetooth or noise control. Its titanium-coated dynamic drivers are rated at 60 ohms, with a stated frequency range of 15–25,000 Hz. Those specifications describe the drivers and their stated range; they are not a substitute for an individual listening preference or a guarantee of a particular sound.
Koss describes the design as rugged and intended for daily use, and the product information lists a limited lifetime warranty. Those are useful points for someone considering a pair for regular handling, but they do not make the headphones wireless or add workout-specific features such as water resistance, which is not listed. Skip Koss if your priority is the lowest listed weight, or if you need Bluetooth for exercise.
• Best for a lightweight listed design → Sony ZX Series. Its item weight is 120 g, a concrete advantage if you want to keep the headphones themselves light.
• Best for adjusting the headband → Koss KTXPro1. It has an adjustable headband and a soft, flexible head sling.
• Best for changing volume from the cable → Koss KTXPro1. Its in-line controller puts an adjustment on the headphone cable.
• Best for a simple set of padded ear cups → Sony ZX Series. Sony lists padded ear cups alongside its 30 mm dome drivers.
• Best for a wider stated frequency range → Koss KTXPro1. Koss lists 15–25,000 Hz, compared with Sony’s 12 Hz–22 kHz. A wider stated range does not, by itself, establish which pair sounds better.
• Best for exercise when you want a lighter pair → Sony ZX Series. Its listed weight supports that preference, but both models remain wired.
• Best for compatible older audio devices → Koss KTXPro1. Its 3.5 mm plug is described for use with devices such as CD and cassette players, computers, tablets, and laptops. Sony also has a 3.5 mm jack, so compatibility still depends on the device.
• Best for a buyer who wants a limited lifetime warranty listed → Koss KTXPro1. The product information names one; the Sony details provided do not list a warranty.
Buying Considerations
For exercise, start with the connection rather than the driver figures. Both headphones are wired and use a 3.5 mm jack. If your phone or music player has no compatible jack, neither is a direct wireless solution. Despite searches for the best Bluetooth headphones for exercise, these two models do not list Bluetooth. A cable may be perfectly manageable for a walk or stationary workout, but it can be a drawback if you want to move without a wire.
For sound, the available figures can help describe the hardware but should not be treated as a verdict. Sony lists 30 mm dome drivers, neodymium magnets, and a 12 Hz–22 kHz range. Koss lists titanium-coated drivers, 60-ohm impedance, and a 15–25,000 Hz range. The Koss impedance is a detail to keep in mind if you are pairing the headphones with a particular device, but the provided specifications do not say how loud either pair will be with your equipment.
Finally, consider who will use them. Both are on-ear, wired designs with a standard jack, so they may suit someone looking for a simple connection rather than wireless features. If you are shopping for kids headphones for exercise, keep the adult age-range description listed for Sony in mind; the provided Koss information does not specify an age range. Neither product sheet gives a fit guarantee for children, so check whether the headband design suits the intended wearer. For either model, check the current price on Amazon if price is part of your decision.
I’d choose Sony ZX Series for exercise because its 120 g listed weight and padded ear cups give it the simpler case for a light, uncomplicated wired setup. The Koss is the better fit if I wanted an adjustable headband and on-cable volume control. My pick is Sony, as long as a 3.5 mm wired connection works with my device and I don’t need Bluetooth.
FAQ
No Bluetooth connection is listed for either model. Both use a 3.5 mm jack, so check that your exercise device supports a compatible wired connection.
The listed specifications do not establish which sounds better. Sony has 30 mm dome drivers and a 12 Hz–22 kHz stated range; Koss has titanium-coated drivers and a 15–25,000 Hz stated range. Listening preferences and the connected device also matter.
Koss lists an adjustable headband, a flexible head sling, and a limited lifetime warranty; its design is described as rugged for daily use. Sony lists padded ear cups and a 120 g weight, but the supplied information does not list comparable headband adjustments or a warranty.
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