803 D4

Their most compact headed model brings all the technical advantages of a dedicated midrange enclosure - the Turbine™ Head, with its decoupled midrange cone - to a smaller footprint that's easily accommodated in any home.

• Technical features

• Diamond tweeter

  Solid body Tweeter-on-Top

  Continuum™ cone FST

  Matrix™

  Anti-Resonance plug

  Biomimetic Suspension

  Turbine™ Head

  Aerofoil™ cone bass units

  Flowport

• Description

• 3-way vented-box system

• Drive units

• 1x ø25mm (1in) Diamond dome high-frequency

  1x ø130mm (5in) Continuum cone FST midrange

  2x ø180mm (7in) Aerofoil cone bass units

• Frequency range

• 16Hz to 35kHz

• Frequency response

• 19Hz to 28kHz (+/-3dB from reference axis)

• Sensitivity

• 90dB (on axis at 2.83Vrms at 1m)

• Harmonic distortion

• 2nd and 3rd harmonics (90dB, 1m on axis)

  <1% 80Hz – 20kHz

  <0.3% 100Hz – 20kHz

• Nominal impedance

• 8Ω (minimum 3.0Ω)

• Recommended amplifier power

• 50W – 500W into 8Ω on unclipped programme

• Max recommended cable impedance

• 0.1Ω