The 805 D4 Signature stand-mount loudspeaker features optimized technologies, including that all-important Diamond Dome tweeter and Solid Body Tweeter-on-Top, an all-new tweeter grille, and upgraded crossover.

805 D4 Signature features our Diamond Dome tweeter and Solid Body Tweeter-on-Top.

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. Fifteen years after we introduced it, we haven't found a better tweeter dome technology.

All-new tweeter grille

Our Solid Body Tweeter-on-Top housing features an elongated form with a longer tube-loading system and an all-new design of tweeter grille, producing an even more free and open sound with high frequencies.

Upgraded crossover

Our 805 D4 Signature uses upgraded rear-mounted crossover designs mounted on stiff aluminum spines. This isolates the sensitive capacitors from the unwanted effects of air pressure within the enclosure and makes for a very effective heatsink to ensure optimum performance when in use.

Continuum™ Cone

Thanks to its composite construction, the Continuum™ Cone avoids the abrupt transitions in behaviour that can impair the performance of a conventional drive unit. The result is a more open, neutral performance from the 805 D4 Signature. Voices and instruments can be heard with precision and transparency.

Technical specifications

Technical features
Diamond tweeter
Solid body Tweeter-on-Top
Continuum™ cone bass/mid
Anti-Resonance plug
Matrix™
Flowport

Description
2-way vented-box system

Drive units
1x ø25mm (1in) diamond dome high-frequency
1x ø165mm (6.5in) Continuum cone bass midrange

Frequency range-
6dB 34Hz to 35kHz

Frequency response
42Hz to 28kHz (+/-3dB from reference axis)

Sensitivity
88dB (on axis at 2.83Vrms at 1m)

Harmonic distortion 
2nd and 3rd harmonics (90dB,1m on axis)
<1% 90Hz – 20kHz
<0.3% 120Hz – 20kHz

Nominal impedance
8Ω (minimum 4.6Ω)

Recommended amplifier power
50W – 120W into 8Ω on unclipped programme

Max. recommended cable impedance
0.1Ω

Dimensions
Height: 440mm (17.3in)
Width: 240mm (9.4in)
Depth: 373mm (14.7in)

Net weight
15.55kg