MPN #ONE18X    

Two-way passive radiator, titanium tweeter, aluminum woofer, 45"55,000 Hz range, 8 Ohms impedance, 85 dB sensitivity, 100"250 W recommended, 10 kg.



The Amphion One18X is a two-way passive studio monitor crafted for precision, clarity, and consistent performance in professional audio environments. It delivers accurate sound reproduction with a natural sense of depth and space, making it suitable for critical listening tasks in music production, broadcast, and post-production work. Its clean, detailed response helps maintain confidence in mixing decisions across a variety of studio setups.

This model features a 6½'' aluminium mid/woofer and a 1'' titanium tweeter, paired through a carefully tuned waveguide for seamless integration and focused stereo imaging. The passive radiator design supports tight, well-controlled bass and improved midrange detail, even when the monitor is placed close to walls. With an acoustically neutral character and wide, even dispersion, the One18X supports consistent results from one room to the next.
  • Highly Detailed Monitoring: Reveals fine sonic details, making it easy to hear everything clearly in your mix.
  • Balanced Sound Reproduction: Offers natural and even response across all frequencies for trustworthy decisions.
  • Wide and Stable Sweet Spot Maintains imaging and clarity even when you move slightly off-center.
  • Compact and Powerful: Delivers full-range performance in a space-friendly size, suitable for many studio setups.
  • Passive Radiator Design: Improves bass clarity and control without needing ports, allowing closer placement to walls.
  • Versatile Use: Performs well in home studios, professional studios, broadcast environments, and more.
  • Reliable and Transparent: Designed for long sessions without listener fatigue, letting you work with full confidence.
  • Horizontal or Vertical Placement: Flexible orientation options make setup simple without compromising sound.
  • DSP-Free Operation: Pure, uncolored audio, fully compatible with your existing gear and software tools.
  • General Specifications
  • Two-way, passive radiator design
  • Recommended listening distance: ~1.25 m " 2.25 m
  • Handmade in Finland

  • Drivers
  • Tweeter: 25 mm / 1'' titanium
  • Mid/Woofer: 18 cm / 6 1/2'' aluminium

  • Performance
  • Crossover point: 1600 Hz
  • Impedance: 8 Ohms
  • Sensitivity: 85 dB @ 2.83V/1m
  • Frequency response: 45 " 55,000 Hz (±3 dB)
  • Power recommendation: 100 " 350 W

  • Physical Specifications
  • Dimensions (H - W - D): 380 - 191 - 305 mm
  • Weight: 10 kg

  • Construction and Design Features
  • 5th generation waveguide for improved driver integration and reduced cabinet diffraction
  • Uniformly Directive Dispersion (U/D/D) technology for consistent in-room performance
  • Acoustic center point between drivers (enables vertical or horizontal orientation)
  • Time-aligned drivers
  • Passive radiator (eliminates reflex ports)
  • 3-way binding posts (banana plugs, spades, or bare wire)
  • DSP-free design for full transparency and compatibility with external signal processing
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