803 D4
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 thats easily accommodated in any home.
Small wonder
803 D4 may be notably more compact than the 801 D4 or 802 D4, but it still bristles with technical innovation, most obviously in its use of a three-box construction. Its 130mm (5-in) midrange cone is carefully isolated from the impact of its bass cones thanks to its Turbine Head enclosure.
Reverse Wrap cabinet
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.
Enhanced Matrix
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.
Aluminium bass pods
803 D4 mounts two Aerofoil bass cones in twin solid aluminum bass pods, each of which is clamped into an aluminum 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.
Step up for more power
803 D4 features all the most iconic ingredients in the 800 Series Diamond range including, of course, that famous headed enclosure. It is, however, smaller than its other siblings. Step up to the 802 D4, and youll get both larger 200mm (8-in) bass cones and a larger 150mm (6-in) midrange driver.
Specifications:
Size & weight
| Dimensions | Height: 1165mm (45.9 in) Width: 357mm (14.1 in) Depth: 511mm (20.1 in) |
| Net weight | 62.15kg (137 lb) |
Technical details
| Technical features | Diamond tweeter Solid body Tweeter-on-Top Continuum cone FST Anti-Resonance plug Biomimetic Suspension Turbine Head Matrix Aerofoil cone bass units Flowport |
| Description | 3-way vented-box system |
| Drive units | 1x 25mm (1in) Diamond dome high-frequency 1x 130mm (5in) Continuum cone FST midrange 2x 180mm (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 | 8 (minimum 3.0) |
| Recommended amplifier power | 50W 500W into 8 on unclipped programme |
| Max recommended cable impedance | 0.1 |
Finishes
| Cabinet finishes | Gloss Black White Satin Rosenut Satin Walnut |
| Grille finishes | Black Grey Black Grey |
