The 6.5″ woofer now uses a composite paper cone with a cotton fiber blend. This combination will enhance the audio reproduction.  While sounding natural, the paper/cotton combination will also add a little warmth to the lower frequency ranges (<250 Hz). The stealth look, honeycomb carbon fiber dustcap adds rigidity without adding unnecessary mass. Another benefit is that it helps keep the audio linear at the speakers mechanical limits. Since the Reference series have been more about the laid-back, underlined look, the only logos in front are on the grilles. However, the machined backplates still have swag with CNC’ed logos.


 Specifications:  Woofer    
Frequency Response: 50 Hz ~ 2 KHz    
Sensitivity: 89.3 dB    
Nominal Impedance: 4 Ohm    
DC Resistance (RE): 3.7 Ohm    
Resonance Frequency (FS): 55.78 Hz    
Power Handling: 125 Watts    
QMS: 5.1    
QES: 0.95    
QTS:  0.8    
VAS: 7.7 L    
CMS: 307 um/N    
MMS: 19.4 g    
Voice Coil Diameter: 1.5"    
BL: 5.9    
Magnet Type: Strontium    
XMAX: 4 mm    

*It is essential that our speakers are given time to allow the suspension to soften up. Depending on use, this may take several weeks. While this process is undergoing, it is not recommended to apply full amplification power according to the speakers specs. Once the moving parts have been broken in, the performance of your speaker will increase.

B2 Audio Reference 6.5" Mid-Woofer (Pair)