The design and proportions of the top two speakers in the range are derived at for sound acoustic reasons – but understandably, not everyone wants the visual disruption that such a radical piece of furniture can create in a home environment. The 803 Diamond takes up less space and is arguably easier on the eye – but thanks to its three bass drivers, it generates a sound that’s almost a match for its bigger brothers.

For the 800 Series Diamond range, we’ve refined the science of magnet motor design to a fine art. Each of the 803 Diamond’s three bass drivers are powered by a dual magnet motor system, creating a more symmetrical magnetic field and reducing harmonic distortion. Meanwhile a unique quad magnet design keeps the tweeter running cool and smooth, even at the highest frequencies.

803 Diamond Specifications

Woven Kevlar
Crossover Tuning
Nautilus Tapering Tube
Flowport
Mushrooms
FST
Tweeter on Top
Matrix
Rohacell
Diamond Tweeters
Sphere / Tube Enclosure
De-coupling
Nautilus
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
	3x ø180mm (7 in) Rohacell® cone bass
Frequency range	-6dB at 28Hz and 33kHz
Frequency response	35Hz – 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% 50Hz – 100kHz
	<0.5% 90Hz –100kHz
Nominal impedance	8Ω (minimum 3.0Ω)
Crossover frequencies	350Hz, 4kHz
Recommended amplifier power	50W – 500W into 8Ω on unclipped programme
Max. recommended cable impedance	0.1Ω
Dimensions
Height:	1164mm (45.8 in) (not including feet)
Width:	306mm (12 in)
Depth:	457mm (18 in)
Net weight	41kg (90 lb)
Finishes
Cabinet:	Cherrywood
	Rosenut
	Piano Black Gloss
Grille:	Black cloth