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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 6 min read · Independent comparison
• ROLLS PM351 biggest strength: It's a personal monitor station — mic, line, and instrument inputs with three independent volume controls, so a performer can blend their own signal against the full mix.
• ROLLS PM351 biggest trade-off: It's not a recording interface. There's no USB, no converters, no computer connection — it's a monitoring utility, not a way to capture audio.
• Solid State Logic SSL 1 biggest strength: A 2-in / 2-out USB-C interface with next-gen 192 kHz / 32-bit converters, balanced monitor outputs, a strong headphone output, and a low-latency Mix button.
• Solid State Logic SSL 1 biggest trade-off: It assumes you're working with a computer or iPad. If you just want to hear yourself better on a live stage, most of its features sit unused.
• Who the PM351 is for: gigging musicians, vocalists, and especially drummers who need to track a click without fighting the front-of-house mix.
• Who the SSL 1 is for: musicians, producers, content creators, and streamers building a home or mobile recording setup.
The PM351 is a small metal-and-plastic box with a very specific job: give one performer control over what they hear. It offers an XLR microphone input, a 1/4" phone line input, and a 1/4" phone instrument input, and — this is the heart of it — three separate volume controls, one for the mic signal, one for the instrument, and one for the line-level signal. That means a vocalist can push their own voice up without touching anyone else's mix, or a guitarist can balance their instrument against a backing track in real time.
Outputs run to a 1/4" phone out and an XLR thru, so you can feed the main mixer or a recorder while you monitor. In my opinion, that thru connection is what makes it genuinely useful rather than a toy — it slots into an existing signal chain instead of replacing it. Rolls also built it to take a beating, and it's a well-known pick for drummers who need to hear a click track clearly while everything else is loud around them.
Who should buy it: anyone who performs live and wants their own monitor control, or any studio player who wants to hear themselves against a full mix without asking the engineer for "more me" every five minutes. Who should skip it: anyone hoping to record into a computer. There's no USB, no preamp-to-DAW path, and no conversion here. If your problem is "I can't get audio into my laptop," the PM351 is the wrong tool. The included Polsen HPC-A30 headphones — 50 mm dynamic drivers, 18 Hz to 22 kHz, closed-back — round out the package for monitoring.
The SSL 1 is a compact 2-in / 2-out USB-C audio interface. It's built around next-gen 192 kHz / 32-bit converters, which is a serious spec for a box this size, and it works with Mac, Windows, and iPads via a compatible USB connection. Around back — or around the front, depending on how you set up — you get balanced monitor outputs for your speakers and a powerful headphone output for tracking and mixing on cans. The Mix button handles low-latency monitoring, which matters when you're layering takes and don't want a distracting delay in your ears.
It also comes bundled with the SSL Production Pack, so you're not starting from zero on the software side. SSL describes it as suitable for musicians, producers, content creators, and streamers, and the portability is a real selling point — it's the kind of interface you can toss in a bag and use anywhere you have a laptop or iPad. The bundle here also throws in a pop filter and a 20 ft XLR microphone cable, plus the same Polsen HPC-A30 closed-back headphones you get with the PM351.
Who should buy it: someone recording vocals or instruments at home, a podcaster or streamer who wants clean input and a headphone mix, or a mobile producer who needs an interface that travels. Who should skip it: a live performer who only needs to hear themselves better on stage and has no interest in a DAW. For that person, the SSL 1's converters and software bundle are money spent on features they'll never touch.
• Best for live stage monitoring → ROLLS PM351. Three independent volume controls and an XLR thru let you blend your own mix and still feed the house.
• Best for recording into a computer → Solid State Logic SSL 1. USB-C, 2-in / 2-out, and 192 kHz / 32-bit conversion.
• Best for drummers tracking a click → ROLLS PM351. This is the use case it's most associated with, and the design reflects it.
• Best for home studio and streaming → Solid State Logic SSL 1. Balanced monitor outs, a strong headphone amp, and the SSL Production Pack software.
• Best for portability across Mac, PC, and iPad → Solid State Logic SSL 1. It's built to travel and connects over USB.
• Best for slotting into an existing analog chain → ROLLS PM351. It adds control without demanding a computer.
• Best all-in-one starter bundle → Solid State Logic SSL 1. Interface, pop filter, XLR cable, and headphones in one box.
• They share the same headphones. Both ship with the Polsen HPC-A30, so the monitoring cans aren't the deciding factor here.
If I had to pick one for myself, I'd take the Solid State Logic SSL 1 — because for most people reading this in 2026, the bottleneck isn't stage monitoring, it's getting clean audio into a computer. The SSL 1 does that job with strong converters, balanced outputs, low-latency monitoring, and a software bundle that gets you recording immediately. That said, if you're a gigging player who just wants to hear yourself on stage, the PM351 is the one I'd recommend, and the SSL 1 would be overkill. Buy for the job you actually have. And since I won't guess at pricing, check the current price on Amazon before you commit.
what is studio monitor headphones
Closed-back headphones designed for accurate, neutral audio reproduction during recording and mixing, rather than for casual listening. The Polsen HPC-A30 included with both products uses 50 mm dynamic drivers with an 18 Hz to 22 kHz frequency response, which is exactly this kind of monitoring tool.
what are the best studio monitor headphones
There's no single answer, because it depends on whether you need isolation or a flat response for mixing. In this comparison, both the PM351 bundle and the SSL 1 bundle include the same Polsen HPC-A30 closed-back headphones, so the headphone side of the equation is identical — your choice really comes down to the interface or monitor station, not the cans.
do i need studio monitors if i have headphones
Not strictly — headphones let you track and check detail without disturbing anyone. But if you're mixing, balanced monitor outputs like the ones on the SSL 1 let you add real speakers later, while the PM351 is oriented toward headphone monitoring of a live or studio mix.
are these two products even comparable
Only partly. The SSL 1 is a USB-C recording interface; the PM351 is a personal monitor station with no computer connection. They overlap because both include the same Polsen studio monitor headphones, but they solve different problems, so pick based on whether you're recording or monitoring.
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