We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-23 · 7 min read · Independent comparison
If you want a wired in-ear monitor built for stage and studio work, with a detachable MMCX cable system and a genuinely isolating fit, choose BASN Bmaster Triple Drivers; if you need a wired in-ear monitor tuned specifically for competitive FPS gaming, with virtual surround and app-based EQ, choose Sony INZONE E9.
• BASN Bmaster Triple Drivers — biggest strength: A triple-driver setup (two dynamic drivers plus one balanced armature) with a 20 Hz–20 kHz range, plus a full accessory kit and two detachable MMCX cables. That's monitoring hardware, not gaming hardware.
• BASN Bmaster Triple Drivers — biggest trade-off: It's a wired, analog 3.5 mm earphone with no app, no virtual surround and no digital processing. What you plug it into is what you get.
• Sony INZONE E9 — biggest strength: A gaming-first feature set — USB-C audio box with 7.1-channel virtual surround, EQ control through the INZONE Hub app, and a low-profile shell with flexible ear hooks built for long sessions.
• Sony INZONE E9 — biggest trade-off: One dynamic driver and a narrower feature scope outside gaming. If you want a monitoring tool for music, it's a less obvious match.
• Who each is for: BASN Bmaster Triple Drivers for musicians, audio engineers and anyone who wants a durable, customizable wired monitor for listening and stage use. Sony INZONE E9 for PC and console players who want positional audio and tunable sound in a wired in-ear.
The Bmaster is the more traditional in-ear monitor of these two. Its driver array — two dynamic drivers and one balanced armature — is aimed at the low end and the details. BASN describes the tuning as balanced and coherent, with good bass, a clear midrange and a treble that stays pleasant rather than sharp. The impedance is listed at 34±1 Ω at 1 kHz (with a 16 ohm figure also listed in the audio specs), which tells you it's meant to be driven by normal headphone outputs rather than needing a dedicated amp.
What makes it interesting for monitoring work is the isolation and the fit. The rounded-tip, ear-canal-shaped housing is designed around a broad sample of ear shapes, and the earhook on the cable keeps the earbuds locked in place — that's the part that matters if you're moving around on a stage. Sound isolation is the stated noise-control method, which means the seal does the work: it keeps outside noise from bleeding into your mix and preserves detail even at lower listening volumes.
Who should buy it: musicians, audio engineers, worship and stage players, and anyone who wants a wired monitor with replaceable cables and a genuinely isolating fit. Who should skip it: if your main use is competitive PC gaming and you want virtual surround and EQ software, this isn't that product. It's also wired-only and analog-only — there's no app, no USB audio box and no digital processing.
Sony INZONE E9: Who It's For
The INZONE E9 is a different animal. Sony built it with Fnatic, an esports organization, and the whole design brief points at one job: hearing footsteps, reloads and positional cues in fast-moving games. The single dynamic driver is tuned for sharp, clear detail rather than a warm, musical low end, and the sealed, fully enclosed body with multiple eartip sizes is there to shut out room noise so you can focus.
The headline feature is the USB-C audio box. It enables 7.1-channel virtual surround and lets you adjust EQ through the INZONE Hub app. That's a meaningful difference from the BASN: the Sony gives you a software layer you can tune, and virtual surround is genuinely useful in FPS titles where directionality decides fights. The listed sensitivity is 101 dB/mW with 16 Ω impedance, and the connection ends in a gold-plated L-shaped stereo mini plug, which is handy for squeezing into tight ports.
Comfort and fit are clearly a priority. The shell is low-profile, the ear hooks are flexible, and Sony ships four eartip sizes — helpful because a secure seal is what makes the passive isolation actually work. The cable is a 1.8 m detachable Y-type design, slim enough to tuck under a headset, and there's a compact carrying case for transport. It's wired-only, so no battery to worry about or charge.
Who should buy it: PC and console gamers, especially FPS players who want surround processing and EQ control, and anyone who wants a low-profile in-ear that disappears under a headset for long sessions. Who should skip it: if you're buying a monitor for live music or studio reference work, the tuning and feature set are pointed at gaming, and the app-based control assumes you're on a platform where INZONE Hub runs.
• Best for stage and studio monitoring → BASN Bmaster Triple Drivers. Triple drivers, earhooks for stability, 6.35 mm adapter for mixers and interfaces.
• Best for competitive FPS gaming → Sony INZONE E9. FPS-tuned dynamic driver, 7.1-channel virtual surround, EQ via INZONE Hub.
• Best for cable longevity → BASN Bmaster Triple Drivers. MMCX detachable system with two cables included, so a failed cable isn't a dead earphone.
• Best for sound customization → Sony INZONE E9. App-based EQ and virtual surround are things the BASN simply doesn't offer.
• Best for fit options out of the box → BASN Bmaster Triple Drivers. Three pairs of memory foam tips plus six silicone tips, versus Sony's four sizes.
• Best for long gaming sessions under a headset → Sony INZONE E9. Low-profile shell, flexible ear hooks, slim 1.8 m Y-cable.
• Best for travel kit completeness → BASN Bmaster Triple Drivers. Carrying case, cleaning tool, cable clip, Velcro strips and adapter all included.
• Best for low-hassle plug-and-play → Sony INZONE E9. Wired, no battery, no charging, sealed design for passive isolation.
In my opinion, these two only look like competitors because both are wired in-ears. They solve different problems. If I were buying for music, monitoring or any kind of live playing, I'd take the BASN Bmaster Triple Drivers — the triple-driver tuning, the isolating fit and the replaceable MMCX cables make it the more durable, more flexible tool over time. If I were buying for competitive gaming on PC, I'd take the Sony INZONE E9 without hesitating, because virtual surround and app EQ are exactly what a shooter player wants and the BASN has no answer to either. Decide which job you're actually buying for, and the choice is obvious. Either way, check the current price on Amazon before you commit.
FAQ
how to check headphones battery on iphone
how to check headphones battery
There's nothing to check here. Wired headphones like these two don't have a battery, a charging case or a battery indicator. If you're trying to monitor battery level, you're thinking of a wireless model, not either of the in-ears compared above.
how to check headphones
If you mean verifying which headphones you have or whether they're connected, the simplest check is the connector: the BASN Bmaster Triple Drivers end in a 3.5 mm plug (with a 6.35 mm adapter included), and the Sony INZONE E9 uses a gold-plated L-shaped stereo mini plug plus a USB-C audio box for surround and EQ.
how to check headphones mic
The BASN Bmaster Triple Drivers ship with an adjustable in-line mic cable, so you can confirm mic support by checking which cable is attached — the in-line mic one or the OFC silver-plated audio cable. The Sony INZONE E9's listed kit centers on the USB-C audio box and detachable 1.8 m cable rather than an included microphone.
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See also: BASN Bmaster Triple Drivers vs Aokeo AK-680, BASN Bmaster vs SONY MDRXB55AP, BASN Bmaster5 vs Aitalk KZ Vibe 2DD