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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
• Sony WH-CH520 — biggest strength: Multipoint Bluetooth 5.2 plus app-based EQ and DSEE processing, so you can pair two devices and still shape the sound to your taste.
• Sony WH-CH520 — biggest trade-off: On-ear pads and no wired jack, so wired listening and long-session over-ear comfort are off the table.
• iKF R2 — biggest strength: Bluetooth 5.4 with dual-device connection, up to 60 hours of playtime, and a 3.5mm jack that keeps it usable when the battery runs dry.
• iKF R2 — biggest trade-off: It's heavier at 0.32 kg and leans on touch controls, which not everyone loves compared to physical buttons.
• Who each pick is for: Sony WH-CH520 is for the commuter or remote worker who lives in calls and wants a light, app-tweakable on-ear. iKF R2 is for the traveler, gamer or retro-styling fan who wants marathon battery and a wired fallback.
The WH-CH520 is a straightforward everyday headphone. It's an on-ear design in Beige, weighs just 147 g, and connects over Bluetooth 5.2. What makes it interesting for a multipoint shopper is that Sony explicitly builds Multipoint Connection in — you can stay linked to two devices at once and hop between them, which is exactly what you want if you take calls on a laptop and stream music from a phone. Swift Pair and Fast Pair smooth out the initial setup.
Battery is the headline number here: up to 50 hours of average life and a quick charge that gives you 1.5 hours from a 3-minute top-up. A full charge takes about 3 hours over USB-C.
Buy it if you want a light on-ear with app-based tuning, multipoint for two devices, and voice control. Skip it if you want a wired option, over-ear padding for marathon sessions, or a gaming latency mode — the WH-CH520 has none of those.
iKF R2: Who It's For
The iKF R2 is the more feature-dense of the two on paper. It's an over-ear, retro-styled headphone in Brown with metal accents and litchi-textured leather, built around a steel strip and leather headband. The over-ear cup shape and that headband construction are the reasons iKF pitches it for extended wear — commuting, work, travel.
On the audio side it uses a 40 mm NdFeB dynamic driver, 32 ohm impedance, and the same 20 Hz to 20,000 Hz range. The selling points beyond sound are ENC (Environmental Noise Cancellation) for calls, a 35 ms low-latency mode for gaming, and Bluetooth 5.4 with dual-device connection — that's multipoint in practice, letting you run two devices at once and switch between music, calls and games. Touch controls handle playback, and the iKF app adds EQ and control customization.
The standout spec is battery: up to 60 hours of average life with a 2-hour charge time. And unlike the Sony, the R2 has a 3.5 mm jack, so an included AUX cable lets you keep listening wired when the battery dies. That's a real difference-maker on a long trip.
Buy it if you want maximum playtime, a wired fallback, over-ear comfort and a low-latency gaming mode. Skip it if you prefer physical buttons over touch controls or you want the lightest possible headphone — at 0.32 kg the R2 is noticeably heavier than the Sony.
• Best for battery life → iKF R2. Up to 60 hours versus up to 50 hours on the Sony.
• Best for quick top-ups → Sony WH-CH520. A 3-minute charge yields 1.5 hours of listening; the R2 doesn't list a quick-charge figure.
• Best for wired listening → iKF R2. It has a 3.5 mm jack and ships with an AUX cable. The Sony has no jack at all.
• Best for light, on-ear wear → Sony WH-CH520. 147 g and an adjustable headband make it the easier all-day carry.
• Best for over-ear comfort → iKF R2. Over-ear cups with protein-skin padding and a steel-strip headband.
• Best for gaming → iKF R2. Its 35 ms low-latency mode is built for audio sync; the Sony lists no gaming mode.
• Best for app-based sound tuning → Sony WH-CH520. DSEE, EQ presets and 360 Reality Audio give you more to adjust.
• Best for newer Bluetooth → iKF R2. Bluetooth 5.4 versus 5.2, both with dual-device multipoint.
If I were buying one, I'd pick the iKF R2 for most people reading this, because the combination of up to 60 hours of playtime, a 3.5 mm wired fallback, over-ear comfort and a gaming latency mode covers more situations in one product. The Sony WH-CH520 is the better choice if you specifically want a light on-ear, a quick-charge safety net, and Sony's app-based tuning and multipoint ecosystem. In my opinion, the R2 is the more versatile headphone; the Sony is the more refined, lighter one.
Multipoint is a Bluetooth feature that lets one headphone hold a connection to two devices at the same time. Both the Sony WH-CH520 and iKF R2 support it — the Sony via Bluetooth 5.2 and the R2 via Bluetooth 5.4 — so you can take a call on a laptop and keep music queued on your phone.
Yes, if they support multipoint. The WH-CH520 uses Sony's Multipoint Connection, and the iKF R2 lists dual-device connection, so each can stay paired to two sources and switch between them without re-pairing.
Both models in this comparison do. The Sony WH-CH520 pairs two devices over Bluetooth 5.2 with Swift Pair and Fast Pair, while the iKF R2 pairs two devices over Bluetooth 5.4 and adds a 3.5 mm wired mode as a backup.
It depends on your priorities, not on price. The R2 wins on playtime (up to 60 vs 50 hours), adds a wired jack and a 35 ms gaming mode, and uses newer Bluetooth 5.4. The Sony wins on weight (147 g), quick charging, and app-based EQ and 360 Reality Audio. Check the current price on Amazon for each before deciding.
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See also: iKF T1 vs Defunc True LITE II: Bluetooth Headphones Low, Sony WH-CH520 vs VNMN 6.1: Music Headphones, JBL Tune 510BT vs JVC Headphones: Bluetooth Multipoint