B&W 804

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Description   3-way vented-box system
Drive units  1x ø25mm (1 in) aluminium dome high-frequency
  1x ø150mm (6 in) woven Kevlar® cone FST™ midrange
  2x ø165mm (6.5 in) Rohacell® cone bass
Frequency range  -6dB at 30Hz and 50kHz
Frequency response  38Hz – 22kHz ±3dB on reference axis
Dispersion  Within 2dB of reference response
Horizontal:  over 60º arc  Vertical:  over 10º arc
Sensitivity  90dB spl (2.83V, 1m)
Harmonic Distortion  2nd and 3rd harmonics (90dB, 1m)
 <1% 90Hz – 22kHz   <0.5% 120Hz – 20kHz
Nominal Impedance  8Ω (minimum 3.0Ω)
Crossover frequencies   350Hz, 4kHz
Recommended Amplifier Power  50W – 200W into 8Ω on unclipped programme
Max. Recommended Cable Impedance
0.1Ω
Dimensions
 Height:  1020mm (40.2 in) (not including feet)
Width:  238mm (9.4 in)
Depth:  351mm (13.8 in)
Net weight  28kg (62 lb)
Finishes
Cabinet- Real Wood Veneers
Cherrywood Rosenut Black Ash

 

Le foto non rendono giustizia a questi diffusori ,  massicci e costruiti in maniera veramente impeccabile  ovunque si nota una qualità davvero a i massimi livelli.

Dal sito Audiogamma:

3 vie, 4 altoparlanti, bass reflex, 2 woofer in Rohacell, midrange FST (Fixed Suspension Transducer) in Kevlar, tweeter Nautilus a cupola metallica. Struttura interna Matrix. Predisposta per bi-wiring, potenza 50-200W. Con tecnologia “Flow Port System”. Legno frassino nero, ciliegio o palissandro

Dal sito ufficiale:

The 804S is a more compact version of the 803S. Exactly the same midrange and tweeter configuration is used, but bass is supplied by two smaller diameter Rohacell® cone drivers. These operate into a narrower Matrix™ braced cabinet, making this model ideal for the medium size listening room – elegant and unobtrusive.

Many of the features that go to making the 800 Series models so exceptional are hidden away inside the system. Silver coating the magnet pole in the tweeter helps extend its high-end response. The midrange driver utilises a powerful Neodymium-Iron-Boron magnet. It supplies enough strength to energise a long magnetic field that remains constant over the voice coil’s full movement, ensuring the incredibly low levels of harmonic distortion necessary to reproduce programme with full clarity to high output levels.

Our crossovers use only air-cored inductors, again for lowest distortion, and capacitors developed and optimised in conjunction with one of the world’s foremost manufacturers. All contacts are gold plated, to ensure long-term freedom from corrosion.

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B&W 804