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Deal.ai › KZ
KZ
KZ Castor Pro

KZ Castor Pro

4.2(57 ratings)

Lowest price, any size

$79.90at KZ Music StoreChecked Nov 8

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Our take on the KZ Castor Pro

The KZ Castor Pro is a wired in-ear monitor built around two 10mm dynamic drivers per side with an electronic crossover, a step up from KZ's single-driver budget models. It aims at musicians and listeners who want strong bass with clear mids and highs for stage or everyday listening. The ergonomic shell shape follows KZ's long-running Castor line. Against pricier multi-driver IEMs it trades refinement for output and punch, and owners of the original Castor generally hear more low-end weight and separation.

Best forMusicians needing affordable stage monitorsBass-forward listenersBuyers stepping up from single-driver IEMsEveryday wired listening from a phone or player
Pros
  • Dual 10mm dynamic drivers per side
  • Electronic crossover separates bass from mids and highs
  • Deep, impactful bass
  • Clear mids and highs for vocals and detail
  • Ergonomic shell design proven across the Castor line
Cons
  • Wired only, no wireless option
  • Dual dynamic drivers can sound less precise than balanced-armature sets
  • Bass emphasis may not suit neutral-sounding fans
  • Fit and tip choice matter a lot for isolation

KZ Castor Pro prices at every store

  • KZ Music StoreNew

    In stockReturn policy

    $79.90Checked Nov 8
    Visit KZ Music Store

What reviewers say

  • 4.2 / 557 ratings

Rated 4.2 out of 5 across 57 ratings, the Castor Pro is generally well received as a bass-rich budget IEM. Buyers tend to praise its low end and value, while some find the tuning too bass-heavy or the fit fussy.

What people mention
  • BassPraisedOwners describe the low end as deep and impactful, a clear step up from single-driver KZ models.
  • Tuning balanceMixedSome listeners like the bass-forward sound, others find it colors the mids.
  • FitMixedThe ergonomic shell suits many ears, but seal depends heavily on the tips used.
  • TrebleCriticisedA few owners say the highs get sharp when pushed loud.
  • BuildPraisedBuyers call the construction solid for a budget in-ear monitor.

About the KZ Castor Pro

The KZ Castor Pro is an in-ear monitor with dual-core 10mm + 10mm dynamic drivers. It uses an ergonomic design and is aimed at musicians who want stage monitoring.

It has an electronic crossover and a four-level electronic tuning filter. A high-precision acoustic tuning switch lets you adjust the sound style to your taste.

The cable is replaceable and connects with a 0.75mm pin. It ends in a 3.5mm plug.

Model
KZ Castor Pro
Type
In-ear
Drivers
Dual-core 10mm + 10mm dynamic drivers
Frequency response
20-40,000Hz
Impedance
Harman Target version: 22-40Ω; Harman Target with Improved Bass version: 16-22Ω
Sensitivity
Harman Target version: 101-104dB; Harman Target with Improved Bass version: 100-103dB
Tuning
Four-level electronic tuning filter with acoustic tuning switch
Cable
Replaceable high-purity oxygen-free copper flat cable, 120±5cm
Plug
3.5mm
Pin type
0.75mm
In the box
1 x KZ Castor Pro, 1 x removable high-purity oxygen-free copper flat cable, ear tips pre-installed on the earphones, 1 x user manual

Questions and answers

How does the Castor Pro differ from the original Castor?
The Pro uses two 10mm dynamic drivers per side with an electronic crossover, where the original Castor is a single-driver design. Owners report more bass weight and better separation between lows and mids.
Is it good for stage monitoring?
Yes. KZ positions it for musicians, and the strong bass and clear mids help you hear a mix on stage. Isolation depends on getting a good seal with the right tips.
Does it have a microphone or wireless mode?
It is a wired in-ear monitor. Whether a mic version exists depends on the cable option chosen, but there is no Bluetooth.
What comes in the box?
Expect the earphones, a detachable cable and a set of ear tips. KZ's budget models typically ship with a small pouch rather than a hard case.
Do I need an amp to drive it?
No. The dual dynamic drivers are easy to drive from a phone or laptop, though a dedicated player or dongle DAC gives cleaner output.
Where is the KZ Castor Pro cheapest?
At KZ Music Store, for $79.90, as of our latest check.
What do buyers say about the KZ Castor Pro?
Rated 4.2 out of 5 from 57 ratings.

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