How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-17 · 7 min read · Independent comparison
If you want wireless active noise cancelling over-ear headphones with long battery life and a collapsible travel-friendly design, choose Amazon Renewed Marshall Monitor II; if you need wired in-ear monitors with a detachable pro cable and serious passive isolation for stage, studio or critical listening, choose CTM CE110.
• Amazon Renewed Marshall Monitor II — biggest trade-off: It's a renewed unit backed by a 90-day limited warranty, and it's over-ear, so it's bulkier than an in-ear monitor even when folded.
• CTM CE110 — biggest strength: A single 10mm titanium-coated dynamic driver with a 2-pin detachable oxygen-free copper cable, tuned for reference-grade detail and around -26dB of passive noise isolation.
• CTM CE110 — biggest trade-off: It's fully wired with a 3.5mm jack, so there's no Bluetooth, no ANC, and its stated frequency range tops out lower than the Marshall's.
• Who the Marshall is for: commuters, travelers and office workers who want one pair of wireless headphones to do everything.
• Who the CE110 is for: musicians, engineers and listeners who want an isolating, repairable wired in-ear for stage or studio work.
The Marshall Monitor II is an over-ear Bluetooth headphone built around active noise cancelling. The ANC system continuously measures ambient noise and works to block it out, which is the feature that defines this pair. In my opinion, that's the whole point of buying it: you want the drone of a plane, a train or a noisy open office to fade back so the music comes forward.
The specifications tell a clear story about how it's meant to be lived with. Battery life is rated at up to 30 hours with ANC engaged and up to 45 hours with it switched off, and a full charge takes about 2 hours. It uses Bluetooth 5 with a stated range of about 10 meters. There's a 32-ohm impedance, a dynamic driver and a 20 Hz–20,000 Hz frequency range — a full-spectrum spec that suits everyday listening. A 3.5mm jack is included, so you can go wired when you want, and the package ships with a USB-C charging cable, a removable 3.5mm cord and a canvas carrying bag. The collapsible design is the detail I'd point a frequent traveler to first.
Controls are handled by a multi-directional knob that covers play, pause, track shuffling, volume and phone functions — a single physical control instead of a row of tiny buttons, which is genuinely easier to find by feel.
CTM CE110: Who It's For
The CTM CE110 is a wired in-ear monitor, and it's aimed at a very different job. At its core is a single 10mm dynamic driver made from titanium-coated PEEK material, which CTM describes as delivering fast, clear reference audio across the spectrum. The 20 Hz to 14.5 kHz frequency response and 32-ohm impedance put it in the same general impedance territory as the Marshall, but the wired, in-ear format is what separates it.
The cable is the standout engineering detail. It's a 2-pin detachable design, quad-braided from more than 320 strands of 99.99% oxygen-free copper, and CTM states it's silver-plated for conductivity and corrosion resistance. Detachable means that if the cable ever fails, you replace the cable — not the earphones. That's a real longevity argument that a fixed-cable design simply can't match, and it's the reason I'd steer working musicians toward this pair.
Isolation is the second pillar. CTM rates it at roughly -26dB of passive noise isolation, and it ships with two tip materials (foam and silicone) in three sizes each. That combination matters: the right tip seals your ear canal, and a good seal is what actually produces the isolation and the bass response. The package includes a protective storage case, and the housings are finished in clear plastic with titanium, PEEK, copper and silicone in the build.
Who should buy it: drummers, guitarists, vocalists, live engineers and anyone who wants an isolating wired in-ear that stays put and can be repaired rather than replaced. Who should skip it: anyone who wants wireless freedom, active noise cancelling or phone-call control from a single knob — the CE110 is wired, with media control on the cable and no Bluetooth at all.
Side-by-Side: Which Should You Choose?
• Best for wireless freedom → Amazon Renewed Marshall Monitor II. Bluetooth 5 with roughly 10 meters of range versus a fully wired 3.5mm connection.
• Best for noise control → depends on the type you want. The Marshall uses active noise cancelling; the CE110 uses passive isolation rated around -26dB. Active fights constant drone; passive seals your ear canal.
• Best for stage and studio monitoring → CTM CE110. The 10mm titanium-coated dynamic driver and reference-oriented tuning are built for detail, and the in-ear fit stays put while you move.
• Best for repairability → CTM CE110. The 2-pin detachable oxygen-free copper cable can be swapped if it wears out; the Marshall's cable is removable but the headphone itself is a sealed wireless unit.
• Best for travel ergonomics → mixed. The Marshall folds into a compact shape and comes with a canvas bag; the CE110 packs tiny into its own protective case.
• Best for extended wear → Amazon Renewed Marshall Monitor II. Over-ear cups rest around your ears rather than inside the canal, which many people find more comfortable over a long flight.
• Best for a single do-everything pair → Amazon Renewed Marshall Monitor II. Wireless, wired-capable, ANC, a control knob and a carry bag make it the more versatile everyday option.
If I had to pick one, I'd buy the Amazon Renewed Marshall Monitor II for everyday life. In my opinion, the combination of active noise cancelling, up to 30 hours of ANC playtime, a collapsible over-ear build and a single multi-directional control knob makes it the better fit for commuting, travel and focused work — and the included 3.5mm cord means you're not stranded if the battery runs down.
I'd only flip to the CTM CE110 if my priority were wired, isolating, repairable in-ear monitoring. The detachable 2-pin oxygen-free copper cable and the roughly -26dB passive isolation are exactly what a musician needs on stage, and a replaceable cable is a genuine long-term advantage. But for most buyers reading this, the Marshall covers more of daily life. Check the current price on Amazon for both before deciding — that's the one number I can't give you here.
FAQ
No. It's a fully wired in-ear using a 3.5mm connection, so there's no Bluetooth and no active noise cancelling. Its noise reduction comes from a passive seal rated around -26dB, which depends on getting the right tip size and material.
They're designed for different jobs, so "better" depends on use. The Marshall offers a full 20 Hz–20,000 Hz range with a dynamic driver for wireless everyday listening. The CE110 uses a 10mm titanium-coated dynamic driver tuned for reference detail, with a 20 Hz–14.5 kHz range. In my opinion, the CE110 is the pick for critical monitoring and the Marshall for relaxed, immersive listening.
The Marshall Monitor II is a renewed unit covered by a 90-day limited warranty, which is worth weighing against its wireless ANC feature set. The CE110 is a new wired in-ear whose detachable cable can be replaced instead of the whole earphone. Which is better value depends on whether you want wireless convenience or wired durability — check the current price on Amazon for each.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.