KZ Castor Bass

from $8

The KZ Castor Bass is a dual dynamic driver in-ear monitor (IEM) designed to deliver a powerful and immersive bass experience while maintaining clarity across the mid and high frequencies. It features a unique stacked driver setup with a 10mm dual magnetic dynamic driver dedicated to the 20-200Hz bass range, and an 8mm dynamic driver handling mid and high frequencies. This design allows the bass to be independently amplified without muddying the tonal balance, providing deep, punchy lows with controlled mids and sparkly highs.

The Castor Bass includes four tuning switches that enable two-level adjustments for both low and high frequencies, resulting in 16 distinct sound profiles to tailor the listening experience to different music genres and preferences. The earphones adopt a compact top-and-bottom stacked cavity structure, enhancing comfort without compromising sound quality. The acrylic resin body with an aluminum faceplate adds durability and a premium look. It supports a frequency response range of 20Hz to 40kHz and features impedance and sensitivity tuned to different variants for optimal output.

  • Dual dynamic drivers: 10mm dual magnetic for bass, 8mm dynamic for mids and highs
  • Frequency response: 20Hz - 40kHz
  • Four tuning switches providing 16 audio profiles for bass and treble adjustment
  • Stacked cavity design for sound quality and comfort
  • Acrylic resin body with aluminum faceplate
  • Impedance: 16-200Ω depending on variant
  • Sensitivity: approx. 103-105dB depending on variant
  • 3.5mm plug with 0.75mm 2-pin connectors

Pros

  • Exceptional bass depth and punch with clear mids and highs
  • Tunable sound profile with multiple switch combinations
  • Compact, comfortable design with premium materials
  • Wide frequency range supported for detailed audio

Cons

  • Requires earphone amp for higher impedance variants
  • Switch tuning can alter soundstage width and midrange presence
  • No included foam eartips starting from 2024 models

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