How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-18 · 8 min read · Independent comparison
• Sony MDR-ZX700 — biggest strength: a single newly developed 50 mm dynamic driver in an over-ear enclosure, tuned for a wide frequency response and studio-style reproduction, with urethane-cushioned ear pads and pressure-relieving comfort for longer sessions.
• Sony MDR-ZX700 — biggest trade-off: it is a fixed-cable, wired-only design with no detachable cable, no carrying case and no swappable plug in the box, so you are locked into one cable and one 3.5 mm connection path.
• BASN BmasterX 6 — biggest strength: a hybrid six-driver setup (1 dynamic + 3 balanced armatures + 2 piezoelectric tweeters) in a resin-and-aluminum in-ear shell, with a silver-plated detachable cable and interchangeable 3.5 mm / 4.4 mm plugs.
• BASN BmasterX 6 — biggest trade-off: it is an in-ear monitor, so it lives or dies by fit — you have to find the right seal among the 7 pairs of tips, and the sound signature is brighter and more analytical than a big over-ear driver.
• Who each is for: pick the Sony if you want one comfortable over-ear pair for everyday listening and casual monitoring at a desk; pick the BASN if you are a musician, drummer, DJ or engineer who needs a stage-ready IEM with replaceable parts.
The MDR-ZX700 is Sony's take on an outdoor monitor headphone, and the spec sheet tells a fairly specific story. The headline is a newly developed 50 mm dynamic driver, which is a genuinely large unit for a headphone in this class. Large drivers generally move more air and tend to produce a fuller low end and a more relaxed, spacious presentation than the tiny drivers crammed into earbuds. Sony pairs that with noise-isolating ear pads and describes the tuning as faithful, studio-quality reproduction with an exceptional frequency response — in plain terms, this is a headphone aimed at people who want an honest, uncolored listen rather than a bass-heavy consumer sound.
The build details back up the "monitor" label. The ear pads use pressure-relieving urethane cushioning, which matters more than it sounds: over-ear headphones are worn for hours, and the comfort of the pad and the clamping feel decide whether you actually keep them on. Sony also rates the driver to resist high power input up to 2,000 mW, which is the kind of headroom that protects the driver when you push a headphone amp or a mixer harder than you meant to. There is a single-sided cord, which keeps the cable out of your way from one side, and a gold-plated plug for a clean connection. The whole thing weighs 260 g, and the enclosure is urethane in black.
Who should buy it? In my opinion, this is for the person who wants one pair of wired over-ear headphones for a desk, a home setup or casual monitoring — someone who values a large driver, comfortable pads and a simple, no-fuss cable over modularity. Who should skip it? Anyone who needs a detachable cable because cables are the part that fails first, anyone who wants to run a balanced 4.4 mm output, and anyone who needs a compact in-ear they can wear on a stage or stuff in a pocket. The Sony gives you one excellent fixed configuration; it does not give you options.
The BmasterX 6 is a purpose-built in-ear monitor, and the driver count is the whole point. BASN combines one dynamic driver for warm bass, three balanced armatures for the mids, and two piezoelectric tweeters for the highs — six drivers per side, split across three different driver technologies. That is a hybrid architecture, and the reason manufacturers build them this way is that no single driver type does everything well. A dynamic driver moves air and delivers weight; balanced armatures are fast and detailed in the midrange; piezo tweeters are used for airy, extended treble. Stacking them means each band is handled by the driver that suits it best.
The physical design supports the pro-audio pitch. The housing is resin with an aluminum plate, shaped ergonomically, and BASN ships 7 pairs of replacement eartips so you can actually find a seal — which is the single biggest factor in how an IEM sounds and how well it blocks outside noise. The cable is detachable and silver-plated OFC, and the plugs are interchangeable between 3.5 mm and 4.4 mm, so the same earphones work with a laptop, a DAP, an audio interface or a stage mixer without an adapter. The accessory kit is unusually complete: a protective case, a 1/4-inch adapter, a cable clip and a cleaning tool, plus the extra tips. The electrical specs are easy to drive at 20 ohms impedance and 107 dB sensitivity, with a 20 Hz–20 kHz range — low impedance and high sensitivity mean a phone or a small dongle can get them loud without a dedicated amp.
Who should buy it? Musicians, drummers, singers, DJs and audio engineers who need something that isolates, stays put for hours and can be repaired by swapping a cable. The lightweight construction is explicitly aimed at preventing fatigue during long sessions. Who should skip it? Anyone who dislikes things inside their ears, anyone who wants to just pull a headphone on and go without fussing with tip sizes, and anyone who prefers the broad, open feel of a full-size over-ear cup. The BmasterX 6 rewards a little setup effort and gives back flexibility the Sony simply does not offer.
• Best for a big, spacious over-ear sound → Sony MDR-ZX700. A 50 mm dynamic driver in a full-size cup moves far more air than an in-ear driver.
• Best for detail and separation across the frequency range → BASN BmasterX 6. Six drivers split the work three ways instead of asking one driver to cover everything.
• Best for cable longevity and repairability → BASN BmasterX 6. The detachable silver-plated OFC cable can be replaced; the Sony's single-sided cord is fixed.
• Best for plug flexibility → BASN BmasterX 6. Interchangeable 3.5 mm and 4.4 mm jacks cover consumer gear and balanced pro outputs in one package.
• Best for all-day comfort without fiddling → Sony MDR-ZX700. Pressure-relieving urethane pads, 260 g, no tip rolling required.
• Best for noise isolation in loud rooms → BASN BmasterX 6. A properly sealed in-ear blocks far more ambient noise than an over-ear pad, which is why stage musicians use them.
• Best for surviving high output levels → Sony MDR-ZX700. Sony rates the driver to handle up to 2,000 mW of input.
• Best for stage, touring and studio work → BASN BmasterX 6. The case, adapter, clip, cleaning tool and extra tips are all built around that job.
I would buy the BASN BmasterX 6 for myself. The reasoning is simple: the hybrid six-driver setup, the detachable cable, the 3.5 mm / 4.4 mm interchangeable plugs and the complete accessory kit give me a tool I can adapt to different gear and repair when something wears out — and cables always wear out first. The Sony MDR-ZX700 is the better pick if you want a single comfortable over-ear pair with a large driver and zero setup, and for pure desk listening that simplicity is genuinely appealing. But if you are choosing one, the BmasterX 6 does more jobs and does them in more places.
Not in a simple yes-or-no way. The Sony uses one large 50 mm dynamic driver in an over-ear cup, which tends to sound bigger and more open. The BASN spreads the work across six drivers per side, which usually means more detail and separation. Which you prefer depends on whether you want scale or precision.
Probably not. At 20 ohms impedance and 107 dB sensitivity, they are easy to drive, so a phone, laptop or small dongle DAC can get them loud. The 4.4 mm plug option matters if you already own a balanced-output source, not because the earphones demand extra power.
The BASN BmasterX 6, assuming you get a good seal with one of the 7 pairs of tips. A sealed in-ear physically plugs the ear canal, which attenuates ambient noise more effectively than the Sony's noise-isolating over-ear pads. If the fit is wrong, though, that advantage disappears — fit is everything with IEMs.
Only on the BASN BmasterX 6. Its cable is detachable and silver-plated OFC, so you can swap it or replace it if it fails. The Sony MDR-ZX700 uses a fixed single-sided cord, so a damaged cable means the headphone needs service rather than a quick swap.
The BASN BmasterX 6 covers both more easily, because it packs into its case, isolates on stage and works with both 3.5 mm and 4.4 mm gear. If your listening never leaves a desk and you want a full-size cup, the Sony MDR-ZX700 is the simpler, more comfortable choice.
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.