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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
• TRUTHEAR NOVA Earphone 1 — biggest strength: a 1DD+4BA hybrid setup with a 3-way crossover, DLP-3D printed acoustic waveguide cavity, and a swappable 0.78 2-pin single-crystal copper cable. It's a tuning-first monitor for people who want to shape their own sound.
• TRUTHEAR NOVA Earphone 1 — biggest trade-off: no active noise cancellation and no app. Isolation depends entirely on tip fit, and all EQ happens on your source, not in a companion app.
• Sony INZONE E9 — biggest strength: a sealed, noise-isolating design with four eartip sizes, flexible ear hooks, a USB-C audio box with 7.1ch virtual surround, and EQ control through INZONE Hub.
• Sony INZONE E9 — biggest trade-off: it's purpose-built for gaming. The 16 Ω / 101 dB/mW tuning and virtual surround are aimed at footsteps and positional cues, not neutral music listening.
• Pick TRUTHEAR NOVA Earphone 1 if you want a music-first monitor you can cable-swap and tune yourself.
• Pick Sony INZONE E9 if you want a plug-in-and-play competitive gaming monitor with surround processing and app EQ.
The NOVA is a five-driver hybrid: one 10 mm dynamic driver handling bass, plus four balanced armatures, split by a 3-way crossover. The 10 mm driver uses a polyurethane suspension composite liquid-crystal dome diaphragm with a dual-cavity internal magnetic circuit built around an N52 magnet. That's a lot of engineering language, but the practical takeaway is simple — this is a monitor designed to keep bass, mids and treble on separate, well-controlled paths rather than letting one driver do everything.
The cavity is the other half of the story. It's DLP-3D printed by HeyGears in a medical-grade high-transparency resin, which lets TRUTHEAR build complex internal acoustic waveguides with filtering built into the geometry, plus RC frequency division calculated to place each driver in its own acoustic path. The shell is lightweight, skin-friendly and rated 14.8 Ω with 123 dB sensitivity and a stated 8 Hz–40 kHz range — a combination that suggests it's easy to drive from a phone or a dongle, though a dedicated DAC will get more out of it.
Tuning-wise, TRUTHEAR describes the NOVA as having slightly less bass gain than the HARMAN IE 2019 curve and high-frequency response close to HARMAN OE 2013 with high HRTF characteristics, with a lower Q value across the system. The result they aim for is warm, soft, clear and natural — not a bass cannon, not a bright, fatiguing monitor.
Who should buy it: listeners who care about tonality, want a hybrid with real crossover design, and like the idea of a 0.78 2-pin interface so they can swap cables later. The braided multi-core single-crystal copper cable (4 strands, 112 cores each, 448 total) with ear hooks to correct length and angle is a serious stock cable, not an afterthought.
Who should skip it: anyone who wants active noise cancellation, a companion app, or virtual surround. There is none of that here. Noise control is listed as none, and controls are wired touch media controls only. If you game competitively and want surround processing, this isn't the tool.
The INZONE E9 is a wired in-ear monitor co-developed with Fnatic, built with feedback from professional esports players and tuned specifically for FPS gaming. The dynamic driver is voiced for clear, sharp detail — the kind of tuning that makes footsteps, reloads and directional audio pop out of the mix rather than sit politely in it.
The design is fully enclosed and sealed, and Sony ships four eartip sizes so you can actually get that seal. Passive noise cancellation here means physical blocking, not electronics: a good fit pushes external noise down so you can focus on the game. Flexible ear hooks and a low-profile shell keep them stable through long sessions, which matters more than people admit once you're three hours deep.
The interesting part is the USB-C audio box. Plug into a PC and you get 7.1-channel virtual surround plus adjustable EQ through the INZONE Hub app. That's a real functional difference from a passive monitor — you're getting processing, not just a driver. Specs are 16 Ω impedance, 101 dB/mW sensitivity, a closed design, and a gold-plated L-shaped stereo mini plug for a reliable connection. The 1.8 m detachable Y-type cable is slim enough to run under a headset, and a compact carrying case handles storage.
Who should buy it: PC gamers who want positional audio, app EQ and a sealed fit without going the over-ear route. Also a sensible pick if you want something that works with a headset over the top.
Who should skip it: critical music listeners. The tuning is aimed at games, and the surround/EQ features live in software. If you don't game on PC, you're paying for capability you won't use.
Side-by-Side: Which Should You Choose?
• Best for competitive FPS gaming → Sony INZONE E9. Purpose-tuned for sharp positional detail.
• Best for virtual surround and EQ → Sony INZONE E9. 7.1ch via the USB-C audio box and INZONE Hub.
• Best for cable customization → TRUTHEAR NOVA Earphone 1. The 0.78 2-pin interface is made for swapping.
• Best for isolation without electronics → Sony INZONE E9. Sealed body plus four eartip sizes.
• Best for easy driving → TRUTHEAR NOVA Earphone 1. 14.8 Ω and 123 dB sensitivity is a very undemanding load.
• Best for long gaming sessions → Sony INZONE E9. Low-profile shell, ear hooks, slim detachable cable.
• Best for a neutral, non-fatiguing signature → TRUTHEAR NOVA Earphone 1. Lower Q value, warm and natural per the design brief.
In my opinion, most people shopping this comparison should buy the TRUTHEAR NOVA Earphone 1. It does more jobs well — music, casual gaming, general listening — and the 0.78 2-pin interface plus the hybrid driver array give it a longer useful life as your gear changes. I'd only steer you to the Sony INZONE E9 if competitive FPS is your main reason for buying, because that's the one thing it does that the NOVA doesn't: software-driven surround and EQ on PC. Check the current price on Amazon before deciding, since that's the one variable I can't speak to here.
Neither of these is a battery-powered product — both are wired. The TRUTHEAR NOVA Earphone 1 uses a 3.5 mm jack, and the Sony INZONE E9 is wired with a USB-C audio box for PC surround. There's no battery to check on either.
How to check headphones battery?
Start with the connection type, since that decides everything else. The NOVA is a 3.5 mm wired in-ear with 14.8 Ω impedance, so it works from almost anything. The INZONE E9 is wired at 16 Ω / 101 dB/mW with a USB-C audio box for 7.1ch surround and EQ. Then check fit — the NOVA needs a good tip seal for isolation, and the INZONE E9 gives you four eartip sizes to get there.
Neither product lists a microphone, and the NOVA's controls are wired touch media controls only. If voice chat matters, plan on a separate mic or a headset with its own boom.
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See also: Sony INZONE Buds vs Skullcandy Aviator 900, Sony INZONE H9 vs Avantree Aura Loop Dual, Sony INZONE E9 vs Amazon Renewed JBL Tune Flex