Little Diamond
805 D4 might be smaller than its tower speaker siblings, but it’s no lightweight: its beautifully constructed Reverse-Wrap cabinet, stiff aluminum bass pods and 165mm (6.5-in) Continuum™ mid-bass cone afford it exceptional bass extension and scale for a relatively compact speaker.

• Diamond Tweeter
• Solid body Tweeter-on-Top
• Continuum™ Cone Bass / Mid
• Anti-Resonance Plug
• Matrix™
• Flowport™

Diamond dome tweeter
One of our most significant accomplishments over the past two decades, the ultra-stiff, supremely accurate Diamond dome tweeter is the perfect combination of low mass, exceptional stiffness and outstanding accuracy. 15 years after we introduced it, we haven’t found a better tweeter dome technology.

Solid Body Tweeter assembly
Our newest Solid Body Tweeter-on-Top housing features an elongated form with a longer tube-loading system, producing an even more free and open sound with high frequencies. The carefully decoupled housing is milled from a single solid block of aluminum to better resist resonance.

Rear-mounted crossover
The new reverse-wrap orientation of the cabinet on 805 D4 means we can place its sensitive crossover components inside their own, dedicated space within the cabinet, which has critical benefits to both performance and serviceability. We’ve taken the opportunity to upgrade the speaker terminals, too.

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.

Go large
Why step up from 805 D4 to 804 D4? First, 804 D4 is a three-way speaker, with twin 165mm (6.5-in) Aerofoil™ bass cones – and that has huge benefits to its power and scale. Second, as a three-way speaker, it includes a dedicated midrange cone, so voices and other details will sound more accurate.

Size & weight
Net weight15.55kg (34.3 lb)
DimensionsHeight: 440mm (17.3 in)
Width: 240mm (9.4 in)
Depth: 373mm (14.7 in)
Technical Details
Technical featuresDiamond tweeter
Solid body Tweeter-on-Top
Continuum™ cone bass/mid
Matrix™
Anti-Resonance plug
Flowport

Description2-way vented-box system
Drive units1x ø25mm (1in) Diamond dome high-frequency
1x ø165mm (6.5in) Continuum cone bass midrange
Frequency range34Hz to 35kHz
Frequency response42Hz to 28kHz (+/-3dB from reference axis)
Sensitivity88dB (on axis at 2.83Vrms at 1m)
Harmonic distortion2nd and 3rd harmonics (90dB, 1m on axis)
<1% 90Hz – 20kHz
<0.3% 120Hz – 20kHz

Nominal impedance8Ω (minimum 4.6Ω)
Recommended amplifier power50W – 120W into 8Ω on unclipped programme
Max recommended cable impedance0.1Ω