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804 D4 is perhaps more conventional in appearance than other floorstanders in the 800 Series Diamond range, but it’s every bit as sophisticated. Its new Reverse-Wrap cabinet is both a mechanical and acoustic revolution in its class, and its new plinth ensures rock-solid, accurate bass response too.
Every stereo model in the new 800 Series Diamond range has a significantly upgraded cabinet with an all-new aluminium top-plate. This also provides a perfect mounting point for all-new Leather by Connolly trim, with luxurious black leather for dark cabinets and light grey for lighter finishes.
Instead of a conventional loudspeaker box, the cabinet in 804 D4 is 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.
A great speaker needs a rock-solid foundation. The new 804 D4 uses a downwards-firing Flowport exiting on to a solid aluminium plinth complete with a steel constrained layer damping sheet, which controls unwanted resonance. It also has greatly upgraded spikes for maximum stability and durability.
Technical features
Diamond tweeter
Solid body Tweeter-on-Top
Continuum™ cone FST
Anti-Resonance plug
Biomimetic Suspension
Matrix™
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 ø165mm (6.5in) Aerofoil cone bass units
Frequency range
20Hz to 35kHz
Frequency response
24Hz to 28kHz (+/-3dB from reference axis)
Sensitivity
89dB (on axis at 2.83Vrms at 1m)
Harmonic distortion
2nd and 3rd harmonics (90dB,1m on axis)
<1% 90Hz – 20kHz
<0.3% 120Hz – 20kHz
Nominal impedance
8Ω (minimum 3.0Ω)
Recommended amplifier power
50W – 200W into 8Ω on unclipped programme
Max. recommended cable impedance
0.1Ω
Dimensions
Height: 1071mm
Width: 306mm
Depth: 391mm
Net weight
36.85kg
Finishes
Cabinet:
Gloss Black
White
Satin Rosenut
Satin Walnut
Grille:
Black
Grey
Black
Grey
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