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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-08 · 7 min read · Independent comparison
• Biggest strength (ATH-M50X): A complete studio-monitor package — 45mm drivers, three detachable cables, a 25-foot extension, a screw-on 1/4" adapter and a carrying pouch, all built around a closed-back circumaural design.
• Biggest trade-off (ATH-M50X): It's wired only, so there's no Bluetooth, no battery and no touch control — you're tethered to whatever you plug into.
• Biggest strength (PH400): 16 outputs across 8× 3.5mm and 8× 6.35mm jacks, with a mono/stereo switch and enough output to drive headphones up to 250Ω — a shared-monitoring hub for an entire band.
• Biggest trade-off (PH400): It is not a headphone. You still need your own cans, and it needs DC 12V/2A power to run.
• Who the ATH-M50X is for: The individual engineer, producer or listener who wants one reliable pair of monitor headphones.
• Who the PH400 is for: The band leader, studio owner or rehearsal-room operator who needs to send audio to many pairs of headphones at once.
This is the classic studio-monitor formula done properly. The 45mm dynamic drivers cover a stated 15 Hz to 28,000 Hz range at 38Ω impedance, which is an easy load for a phone, an interface or a mixer. The closed-back, over-ear design gives you passive sound isolation, so you can track a vocal without the click bleeding into the mic, and the 90-degree swiveling ear cups let you pull one side off for one-ear monitoring. That single feature is why so many DJs and studio engineers keep a pair around.
Who should skip it? Anyone who wants wireless freedom. There is no Bluetooth here, no battery and no touch controls — the "touch" element in the spec sheet refers to the control method noted on the product, but the reality of this headphone is a wire. If your priority is a memory foam ear cushion Bluetooth headphone you can wear in the field without a cable snagging on a branch, this isn't that product. It's a monitoring tool first.
Bolanle PH400: Who It's For
The PH400 is a different animal. It's an 8-channel headphone amplifier with 16 total outputs — eight 3.5mm jacks and eight 6.35mm jacks — so eight musicians can each get their own feed with what the spec describes as zero interference. The output is rated to drive headphones up to 250Ω, which covers high-impedance studio models that a phone or a laptop jack simply can't push to a usable level. Bolanle's own copy names the ATH-M50x, Sony MDR-7506 and Beyerdynamic DT series as examples, which tells you who this is aimed at.
The mono/stereo switch is the detail that reveals its purpose. Mono is the mode for live sound checks and in-ear monitoring, where you want a single consistent signal; stereo is for playback and mixing, where you want the full image. Add a 7-color breathing LED ring around the volume knob — genuinely useful on a dark stage — and a compact metal housing weighing about 1.2 pounds, and you have a box designed to sit on a rehearsal-room floor and just work.
Who should skip it? Anyone shopping for a single pair of headphones to wear while hunting, commuting or editing alone. The PH400 makes no sound on its own. It needs DC 12V/2A power, it has no battery and no wireless technology, and its noise control is listed as none. It's infrastructure, not a listening device. If you buy this expecting headphones in the box, you'll be disappointed.
• Best for individual studio monitoring → Liquid Audio Audio-Technica ATH-M50X. One pair, three cables, one-ear monitoring, done.
• Best for a full band or rehearsal room → Bolanle PH400. 16 outputs means everyone gets their own feed.
• Best for high-impedance headphones → Bolanle PH400. Rated to drive loads up to 250Ω.
• Best for plug-and-go simplicity → Liquid Audio Audio-Technica ATH-M50X. A 3.5mm jack and a 38Ω load works almost anywhere.
• Best for cable reach and adaptability → Liquid Audio Audio-Technica ATH-M50X. The 25-foot extension plus three detachable cables covers almost any setup.
• Best for dark stages → Bolanle PH400. The illuminated 7-color volume knob is a small thing that matters more than you'd expect.
• Best for hunting → Liquid Audio Audio-Technica ATH-M50X. Closed-back isolation and no cable-free battery to die in the cold — though neither product is a wireless field headphone.
• Best for travel and storage → Liquid Audio Audio-Technica ATH-M50X. It folds and comes with a pouch; the PH400 is a powered desktop unit.
For most people reading this, I'd buy the Liquid Audio Audio-Technica ATH-M50X. It stands alone, it's ready out of the box, and the bundle removes the small annoyances that make studio work fiddly. In my opinion it's the better first purchase because it does something useful the moment you unbox it.
The Bolanle PH400 is the smarter buy only if you already own headphones and your problem is distribution, not reproduction — a band, a rehearsal space, a multi-person tracking session. Buy the amp for the room, the headphone for the person. For hunting specifically, I'd still lean toward the closed-back isolation of the M50X, and if you want wireless freedom in the field you should look for a dedicated Bluetooth headphone with memory foam ear cushions and touch controls, because neither of these two is built for that job.
what is studio monitor headphones
Studio monitor headphones are closed- or open-back headphones designed to reproduce audio accurately rather than to flatter it, so you can hear what's actually in a mix. The ATH-M50X fits this description: closed-back, over-ear, with 45mm drivers covering 15 Hz to 28,000 Hz.
what are the best studio monitor headphones
That depends on your setup, not on a single winner. For a personal pair, the ATH-M50X's 38Ω impedance and detachable cable system make it easy to live with; for powering many pairs of high-impedance headphones at once, the Bolanle PH400's 16 outputs and 250Ω drive rating are what you want.
do i need studio monitors if i have headphones
Not necessarily — plenty of work gets done on headphones alone, and the ATH-M50X's passive isolation and one-ear monitoring cover most tracking and mixing tasks. Monitors and headphones solve different problems, so many engineers eventually want both rather than replacing one with the other.
what are studio monitor headphones
They're headphones built for critical listening and monitoring rather than casual playback — think accurate drivers, a neutral-ish presentation and a durable, serviceable design. The ATH-M50X's replaceable detachable cables and foldable frame reflect that intent; the PH400 isn't a headphone at all but the amplifier that feeds them.
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