CRAFTED AUDIO, LLCRevision A
BMR28
Balanced mode radiator drive unit, 28 mm
Description
The BMR28 is a 28 mm full-range balanced mode radiator. Rather than moving as a piston, the diaphragm is tuned to bend in controlled modes, which holds dispersion wide and even to the top of the band and keeps phase coherent off axis.
Supplied as a bare drive unit for designers building their own enclosure.
Construction
- High-temperature magnet assembly with full magnetic shielding
- Neodymium motor, available in varying grades
- Compact package — small footprint and small depth
- Lighter than comparable cone drivers of the same output
- Can be weatherized
Acoustic character
- Predictable and even frequency response
- Coherent phase response
- Ultra-wide dispersion — effective in non-ideal locations
- Consistent voicing across the range, so sizes mix freely
Performance
- Impedance
- 8 Ω
- Power handling
- 14 W RMS
- Sensitivity
- 83.1 dB @ 2.83 V / 1 m
Thiele–Small
- Vas
- 0.070 litre
- Fs
- 217.3 Hz
Physical
- Length
- 42 mm (1.65 in)
- Width
- 42 mm (1.65 in)
- Depth
- 28 mm (1.10 in)
- Mass
- 62 g (2.2 oz)
Mounting and connection
- Baffle cut-out
- Ø39.5 mm (1.56 in)
- Frame
- Ø41.30 mm (1.63 in)
- Fixing
- Clamped or clipped — see BMR28ASY01
- Terminals
- 2 × blade 2.9 × 0.32 mm — .110 series
Supplied as the ND8R. Crafted stocks and ships the 8 Ω unit; the frame, cut-out and depth are common across the BMR28 range.
Warranty — one year from date of shipment against defects in materials and workmanship. Remedy limited to repair or replacement at Crafted's option. Full terms at craftedav.com/warranty.
Balanced mode radiator technology is licensed from Tectonic. Product names of other manufacturers are used only to identify the parts described.