We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 6 min read · Independent comparison
If you want a lightweight, open-air headphone for practicing digital piano and hearing the room around you, choose Roland RH-A7-BK; if you need a personal monitoring station that blends your mic, instrument and a backing mix under your own control, choose ROLLS PM351.
• Roland RH-A7-BK — biggest strength: a 40mm dynamic driver in an open-air, over-ear design tuned for modern digital instruments, with a wide 20 Hz–20,000 Hz range and a light, breathable fit for long sessions.
• Roland RH-A7-BK — biggest trade-off: the open-back format leaks sound both ways, so it is not a tool for isolating yourself from a noisy room or for tracking a vocal without bleed.
• ROLLS PM351 — biggest strength: it is a monitoring system, not just a headphone — XLR mic in, 1/4" line and instrument in, three independent level controls, plus 1/4" and XLR thru to feed a mixer or recorder, bundled with closed-back Polsen HPC-A30 headphones with 50mm drivers.
• ROLLS PM351 — biggest trade-off: it is a wired, corded-electric rig built around a metal-and-plastic box that wants to sit on a stand or wall, so it is heavier, more desk-bound and more setup-dependent than a plain headphone.
• Buy the Roland if you are a pianist, student or teacher who wants natural, uncolored sound and the ability to still hear instructions and the room.
• Buy the Rolls if you are a performing or recording musician — drummers chasing a click track especially — who needs to control your own monitor mix on stage or in the studio.
The RH-A7-BK is a purpose-built practice and playback headphone. Roland designed it around its own digital piano range, and the spec sheet backs that up: a 40mm dynamic driver, 34-ohm impedance, and a 20 Hz–20,000 Hz frequency range. That impedance is low enough that it doesn't demand a dedicated headphone amp — it will happily run off the jack on a digital piano, a keyboard, a laptop or a phone with the included gold-plated stereo mini plug and the mini-to-1/4" adapter.
Who should buy it: digital piano players, students in lessons, teachers, and anyone who wants an unfatiguing, open, natural presentation for long practice or casual listening at a desk. Who should skip it: anyone who needs isolation. If you're tracking vocals in the same room as a speaker, monitoring in a loud live environment, or sharing a space with noise, the open design works against you — that's the wrong tool for the job.
ROLLS PM351: Who It's For
The PM351 is a different category of product entirely, and that's the point of this comparison. It's a personal monitor station: a small metal-and-plastic hub that gives a musician independent control over their own monitoring level against the whole mix. On the input side you get an XLR microphone input, a 1/4" phone line input, and a 1/4" phone instrument input. On the control side, three separate volume controls let you balance mic, instrument and line signals independently — so you can push your own voice up, pull the backing track down, and hear yourself the way you need to.
Outputs are just as practical: a 1/4" phone out and an XLR thru, so you can feed the main mixer, a recorder, or a front-of-house rig. The description singles out drummers monitoring a click track as a common user, which makes sense — a click you can dial in at your own level, without touching anyone else's mix, is exactly what a live or studio drummer needs. The package pairs the station with Polsen HPC-A30 closed-back studio monitor headphones: 50mm dynamic drivers and an 18 Hz–22 kHz response for accurate, isolating reproduction. Closed-back is the right call here, because the whole point is hearing your mix.
Who should buy it: gigging musicians, vocalists, drummers, studio players and anyone in sound reinforcement who needs hands-on control of their own monitor feed. Who should skip it: the casual pianist or home listener. If you just want comfortable headphones for practice and playback, the Rolls rig is more hardware, more cables and more setup than that job requires.
• Best for digital piano practice → Roland RH-A7-BK. It's tuned for modern digital instruments and runs off a standard 3.5mm jack.
• Best for hearing your teacher or the room → Roland RH-A7-BK. The open-air design is built for exactly that kind of interaction.
• Best for isolation and critical monitoring → ROLLS PM351. The bundled Polsen HPC-A30 is closed-back with 50mm drivers and an 18 Hz–22 kHz range.
• Best for controlling your own monitor mix → ROLLS PM351. Three independent level controls over mic, instrument and line, plus XLR thru and 1/4" out.
• Best for drummers needing a click track → ROLLS PM351. This is the use case the design is explicitly aimed at.
• Best for long, comfortable sessions → Roland RH-A7-BK. Lightweight build, breathable open fit, soft suede-finish pads.
• Best for a simple, single-cable setup → Roland RH-A7-BK. One wired 3.5mm connection, adapter included, no extra box.
• Best for stage and studio signal routing → ROLLS PM351. XLR connectivity and thru outputs make it part of the signal chain, not just an end point.
In my opinion, the right pick comes down to whether you're buying a headphone or a monitoring system. If your world is a digital piano, a lesson room, or a desk where you want open, natural sound and the ability to stay aware of your surroundings, I'd buy the Roland RH-A7-BK — it's purpose-built for that and stays comfortable while it does it. If you're playing live or tracking in a studio and need your own mix under your fingers with a closed-back monitor on your ears, I'd buy the ROLLS PM351. For the specific job of "studio monitor headphones for a player who needs control," the Rolls package is the more capable tool; for pure practice and playback comfort, the Roland wins.
FAQ
what is studio monitor headphones
what are the best studio monitor headphones
There's no single answer, because the best monitor headphone depends on whether you need isolation or openness. The Polsen HPC-A30 in the Rolls package is closed-back for isolated critical listening, while the Roland RH-A7-BK is open-air for natural, ambient-aware playback — two different jobs, two different designs.
do i need studio monitors if i have headphones
If you already have monitor headphones like the Polsen HPC-A30, you have accurate reproduction for your ears — but headphones can't replicate the room interaction and stereo image of speakers. For many players, headphones alone are enough for practice and monitoring; the Rolls PM351 adds mix control, not room sound.
what are studio monitor headphones
To put it plainly: they're headphones built around flat, faithful sound rather than consumer-style tuning, used for recording, mixing and live monitoring. The 50mm-driver Polsen HPC-A30 here is a closed-back example, while the open-air Roland RH-A7-BK leans toward natural playback and practice.
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