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BD 20-6-031 20 mm Diamond Tweeter 

The BD20–6–031 is a 0.8 inch tweeter with ultra hard diamond dom in a 82 mm frontplate. As the dome breakup frequency is around 60 kHz, no damping cutouts are required. The unsurpassed rigidity of the diamond dome leads to most accurate conversion from electrical energy to sound pressure. An FEA optimized underhung motor design with vented aluminium voice coil former and neodymium magnet guarantees low energy storage and excellent heat transfer. The soft fabric surround and ferrofluid with high viscosity center the moving parts with excellent linearity.

We recommend the BD20-6-031 in an application above 2500 Hz.

Our diamond speakers are only sold to loudspeaker producers. 

BD020-06-031_DimWeb-Draht.png

Dome material Diamond
Application Tweeter
Overall diameter 82 x 82MM
Cutout Diameter/Square 64 x 64MM
Overall depth 57MM
Motor assembly depth --
Motor assembly diameter --
   

Main Features

underhung motor design
soft fabric surround
vented vc & pole piece
ferrofluid filling
2500 HZ - 60000 HZ

Technology
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Mechanical Data

Specification   Value Unit
Overall diameter   82 x 82 mm
Cutout Diameter/Square   64 x 64 mm
Min. frontplate thickness   5 mm
Overall depth   57 mm
Motor assembly depth   -- mm
Motor assembly diameter   -- mm
Screwfitting   DIN 7984 / Ø 4.50 mm
Terminal   +: 4.8 x 0.8 / -: 2.8 x 0.8 mm
Shipping weight (pair)   1.1 Kg
Shipping box size (pair)   130 / 130 / 190 mm
   

Thiele/Small Parameters

Specification   Value Unit
Sensitivity (2.83V / 1m) Spl 89 dB
DC-resistance Re 6.55 Ohm
Resonance frequency Fs 1000 Hz
Equivalent volume of air Vas - ltr
Mechanical Q Qms 0.58  
Electrical Q Qes 0.83  
Total Q Qts 0.34  
Effective piston area Sd 3.46 Cm2
Moving mass Mms 0.19 g
Suspension compliance CMs 0.141 mm/n
Mechanical resistance Rms 2.21 Kg*s
   

Voice Coil Parameters

Specification     Value Unit
Power handling P 120   W
Linear excursion XMAX +/-0.1   mm
Voice coil diameter   19.4   mm
Voice coil former material   Al    
Voice coil material   Cu    
Voice coil inductance LE 0.02   mH
Force factor BL 3.21   N/A
Motor type   underhung    
Ferrofluid filling   Yes    
   

Frequency Response

FRQ_BD20-6-031_prog_1__3_.png

Impedance [OHM]

IMP_BD20-6-031_prog_1__1_.png

Harmonic Distortion [%]

Klirr_BD20-6-031_prog_1__2_.png

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