800 Series Diamond

804 Diamond

The 804 Diamond boasts a truly commanding acoustic performance, thanks to its three-way design incorporating two Rohacell® bass units, an FST™ midrange and a diamond dome tweeter.

804 Diamond

As wonderfully versatile as its smaller brother the 805 Diamond, the elegant, floorstanding 804 Diamond has an even more commanding acoustic presence, thanks to a true three-way design incorporating two Rohacell® bass units, an FST™ midrange and a diamond dome tweeter delivering pin-sharp clarity all the way up the frequency range. A brilliant all-round performer for any occasion.

The hypothetical perfect tweeter is one that balances infinite stiffness with near-zero density. Only one material on earth comes close to matching those properties: diamond. Thanks to modern scientific techniques, we can grow diamond, like a crystal, to form the optimum tweeter dome shape. The result is truly exceptional sound at high frequencies. And it comes as standard with every speaker in the range, including the 804 Diamond.

For a long time, we thought our Kevlar® midrange cones couldn’t get any better – but then we came up with the fixed suspension transducer (FST for short). FST enhances the properties of Kevlar by acting like a circular shock absorber around the cone, absorbing the sound-smudging bending waves that travel outwards to the perimeter. A midrange driver never sounded cleaner, or more responsive.

804 Diamond
Woven Kevlar
Crossover Tuning
Nautilus Tapering Tube
Flowport
Mushrooms
FST
Tweeter on Top
Matrix
Rohacell
Diamond Tweeters
De-coupling
Quad Magnet Tweeter Motor
Dual Magnet Tweeter Motor
Description 3-way vented-box system
Drive units 1x ø25mm (1 in) diamond 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 33kHz
Frequency response 38Hz - 28kHz ±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
Height: 1020mm (40.2 in) (not including feet)
Width: 238mm (9.4 in)
Depth: 351mm (13.8 in)
Net weight 27kg (59 lb)
Cabinet: Cherrywood

Rosenut

Piano Black Gloss
Grille: Black cloth

Stereophile - September 2013
"For the money, I don't feel you can do much better - different, maybe, but for making music, not better."
Read the full review

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802 Diamond

802 Diamond

The 802 Diamond is the smaller of the two 'headed' models in the 800 Series Diamond. It offers immense levels of scale and clarity, and is destined to be a favourite among audiophiles for many years to come.

803 Diamond

803 Diamond

The 803 Diamond might look almost as imposing as the 802 Diamond, but thanks to its smaller footprint and more traditional cabinet design, it will fit more comfortably into a home environment.

805 Diamond

805 Diamond

The 805 Diamond is an industry world-first – the only speaker of its size and type to incorporate true studio-grade technology in the form of a diamond dome tweeter.

HTM4 Diamond

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The HTM4 Diamond is the perfect centre channel speaker for smaller home theatre set ups, thanks to a neat space-saving design and combined bass/midrange driver.

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