Fostex RPmk3 AMS-T50RPMK3

A planar magnetic studio tool that demands a real amp and punishes weak sources. Great for the right desk, useless on a bus.

The sound is the whole point, and it's a mixed bag depending on your setup. With a proper amp, the planar driver wakes up and delivers that crisp, uncolored studio sound. The 3,000 mW max input means you can push them hard without distortion. But the 92dB sensitivity is low, so your phone or iPod will just shrug. The 15Hz-35kHz range looks great on paper, but our database puts the sound at a middling 43rd percentile. That's not a knock on the driver, it's a knock on the fact that most people won't feed these the power they crave.

The T50RP MK3 sits in a weird spot. The Sony ULT WEAR and JBL Tune 670NC are wireless, have ANC, and cost less in many markets, but they're consumer-tuned and won't give you that flat studio response. The Sennheiser HDB 630 is the closest philosophical rival, another wired studio-focused option, but it's also not exactly a comfort king. If you want planar magnetic specifically, the Fostex is the budget pick, but you're trading comfort and convenience for that driver tech.

At $170 USD, these are a solid entry into planar magnetic sound if you already own an amp. But if you're starting from scratch, factor in another $100+ for a decent headphone amp. The EUR 236-240 price in Europe feels steeper, and at that point you're competing with some very capable closed-back options. Worth it for the right person, not for the casual listener.

The Fostex T50RP MK3 is a studio workhorse that doesn't care about your phone. These semi-open planar magnetics are built for desks, amps, and people who want a flat, honest sound signature. The headline here is the driver tech: Fostex's patented Regular Phase diaphragm with a copper foil etched into polyimide film and a beefy neodymium magnet. That's a fancy way of saying it's designed to be fast, clear, and ruthlessly revealing. Just don't expect to plug these into a laptop and call it a day.

If you want wireless convenience, active noise cancelling, or something you can wear for hours without thinking about it, this isn't your headphone. Go grab a Sony ULT WEAR or JBL Tune 670NC instead. If you don't own a headphone amp and have no plans to buy one, you're setting yourself up for disappointment.

Buy the Fostex T50RP MK3 if you have a headphone amp and want to hear what planar magnetic drivers do to your music. Skip them if you want something to use with your phone or if comfort is a priority. They're a tool, not a lifestyle accessory.