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Classic quality
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.

Aluminium top-plate
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.

Reverse Wrap cabinet
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.

Aluminium plinth
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.

The science of sound
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.

Get a Head
804 D4 is the entry-level floorstanding model in the 800 Series Diamond range. Step up to 803 D4 and you’ll find larger bass drivers (180mm, 7in) plus, crucially, the addition of a Turbine™ Head enclosure for the 130mm (5in) midrange cone, which adds even more spaciousness to the sound.

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
8ohms (minimum 3.0ohms)

Recommended amplifier power
50W – 200W into 8ohms on unclipped programme

Max. recommended cable impedance
0.1ohms

Dimensions
Height: 1071mm
Width: 306mm
Depth: 391mm

Net weight
36.85kg

Cabinet finishes
Gloss Black
White
Satin Rosenut
Satin Walnut

Grille finishes
Black
Grey
Black
Grey