| Specification | Value | Unit | |
| Overall diameter | 47.6 | mm | |
| Cutout Diameter/Square | 48 | mm | |
| Min. frontplate thickness | 6 | mm | |
| Overall depth | 29 | mm | |
| Motor assembly depth | -- | mm | |
| Motor assembly diameter | -- | mm | |
| Screwfitting | -- | mm | |
| Terminal | +: 4.8 x 0.8 / -: 2.8 x 0.8 | mm | |
| Shipping weight (pair) | 0.6 | Kg | |
| Shipping box size (pair) | 175/82/45 | mm | |
BD 20-5-048 Cell 20 mm DIAMOND TWEETER
The BD20-5-048 is a 0.8 inch tweeter with ultra hard diamond dome in a 48 mm body. A proprietary clamping technique provides easy mounting and adapting to individual frontplates. As the dome breakup is above the audible range and well damped, no dome cutouts are required. A unique FEA optimized underhung motor design with vented titanium voice coil former and double neodymium magnet guarantees low energy storage, excellent heat transfer and high excursion capability for low power compression and ultra low distortion. The new designed soft fabric surround centers the moving parts with improved linearity.
We recommend our BD20-5-048 in an application above 2500 Hz.
Our diamond speakers are only sold to loudspeaker producers.
| Dome material | Diamond |
| Application | Tweeter |
| Overall diameter | 47.6 MM |
| Cutout Diameter/Square | 48 MM |
| Overall depth | 29 MM |
| Motor assembly depth | -- |
| Motor assembly diameter | -- |
Main Features
full featured cell concept
underhung motor design
vented vc & pole piece
no ferrofluid filling
2500 HZ - 60000 HZ
Mechanical Data
Thiele/Small Parameters
| Specification | Value | Unit | |
| Sensitivity (2.83V / 1m) | Spl | 90 | dB |
| DC-resistance | Re | 4.5 | Ohm |
| Resonance frequency | Fs | 1032 | Hz |
| Equivalent volume of air | Vas | - | ltr |
| Mechanical Q | Qms | 11.17 | |
| Electrical Q | Qes | 0.75 | |
| Total Q | Qts | -- | |
| Effective piston area | Sd | -- | Cm2 |
| Moving mass | Mms | -- | g |
| Suspension compliance | CMs | -- | mm/n |
| Mechanical resistance | Rms | -- | Kg*s |
Voice Coil Parameters
| Specification | Value | Unit | |
| Power handling | p | 50 | W |
| Linear excursion | Xmax | +/-0.8 | mm |
| Voice coil diameter | -- | mm | |
| Voice coil former material | Ti | ||
| Voice coil material | Cu | ||
| Voice coil inductance | Le | 0.05 | mH |
| Force factor | Bl | -- | N/A |
| Motor type | Underhung | ||
| Ferrofluid filling | No | ||
Frequency Response [DB]
Impedance [Ohm]
Harmonic Distortion [%]
