Our 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.
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Instead of a conventional loudspeaker box, our cabinets are made from a continuous curved section of wood, with the drive units mounted at the heart of the curvature. This stiffer, more inert structure resists mechanical resonances far better and also ensures better dispersion of sound.
Matrix bracing uses interlocking panels to reinforce loudspeaker cabinet walls in all directions internally, reducing resonance and creating a more believable soundstage. The Matrix assembly in 803 D4 is our best yet, ensuring optimum scale, power and intelligibility.
803 D4 mounts two Aerofoil™ bass cones in twin solid aluminium bass pods, each of which is clamped into an aluminium plate fixed to the stiffest part of its curved cabinet. Formed as single pieces of metal, these stiff structures provide the perfect mechanical location for those powerful bass cones.
Innovation is at the heart of everything we do. We question, we examine, we understand and then we evolve. We use computer modelling to explore and reimagine every aspect of loudspeaker design. Learn more about all the technologies that combine to make 800 Series Diamond™ so special here.
|Dimensions||Height: 1165mm (45.9 in)
Width: 357mm (14.1 in)
Depth: 511mm (20.1 in)
|Net weight||62.15kg (137 lb)|
|Technical features||Diamond tweeter
Solid body Tweeter-on-Top
Continuum™ cone FST
Aerofoil™ cone bass units
|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|
|Cabinet finishes||Gloss Black