KZ Castor Dual Dynamic Driver IEM (Harman Target, 3.5mm Mic)

The KZ Castor is a wired in-ear monitor with two stacked dynamic drivers (8mm and 10mm dual-magnetic), one dedicated to bass and one to mids and highs, tuned to the Harman target curve. This version comes with a 3.5mm cable and in-line microphone, so it suits gamers and everyday listeners who want balanced, detailed sound on PC, console controllers or phones with a headphone jack.

Highlights

• Dual dynamic drivers (8mm + 10mm dual-magnetic) in a stacked layout with an electronic crossover
• Harman Target tuning for a balanced, natural sound with clean bass and clear vocals
• 4-switch tuning lever: two bass steps and two treble steps, up to 16 sound profiles
• Detachable 0.75mm 2-pin cable with 3.5mm plug and in-line mic for voice chat
• Easy to drive (31-35 ohm, 105dB): works straight from phones, controllers and PC jacks without an amp
• Compact injection-moulded shell for a secure, comfortable fit

Full specifications

What's in the box

• KZ Castor earphones
• Detachable cable with 3.5mm plug and in-line mic
• Silicone ear tips (2 pairs: M fitted, S in bag)
• Tuning lever tool
• Instruction book

Works with: Any device with a 3.5mm headphone jack: PC and laptop audio jacks, PS5 and Xbox controllers, Nintendo Switch, Steam Deck and phones with a jack (use a USB-C to 3.5mm adapter on phones without one). On PCs with separate mic and headphone jacks, a TRRS splitter is needed for the mic.

Know your gear

• Driver size — The speaker inside each earcup. Larger, well-tuned drivers usually deliver fuller bass and a wider sense of space.
• Active noise cancelling (ANC) — Microphones listen to the room and cancel steady background noise — fans, AC, traffic — so you can focus on the game.
• Microphone — Detachable and boom mics sit close to your mouth for clear voice chat; noise filtering removes keyboard clicks and background sound.
• IEMs (in-ear monitors) — Earphones that seal in your ear canal — excellent isolation and very precise imaging, which is why many pro players use them under headsets.
• DAC / amplifier — Converts digital audio to analog and powers your headphones — cleaner, louder and more detailed than a typical PC or phone headphone port.
• 4.4 mm balanced output — A separate signal path for each channel — more power and lower noise for headphones and IEMs that support it.

100% genuine KZ — sourced from the official KZ store.

🚚 Estimated delivery: 7–17 business days · Free tracked shipping worldwide.