BC/OC 4" Midwoofer
Vifa
Type Number:BC11SG49-04

Features

The BC/OC product line is known for its quality tweeters and midwoofers. Designed in Denmark by our experienced team of audio engineers, Peerless BC/OC products can meet the most demanding needs for both volume and audio excellence. The BC/OC product line has ferrofluid in the magnet gap for improved cooling of the driver.

Driver Highlights: Polymer-chassis, coated NRSC paper cone, magnetically shielded

Specs

Electrical Data
Nominal Impedance Zn 4 ohm
DC Resistance Re 3.25 ohm
Voice Coil Inductance Le 0.42 mH
TS Parameters
Resonance Frequency fs 64 Hz
Mechanical Q factor QMS 2.31
Electrical Q factor QES 0.4
Total Q factor Qts 0.34
Force Factor Bl 4.2 Tm
Moving Mass Mms 5.4 g
Effective Piston Area sd 58 cm^2
Equivalent Volume Vas 5.5 ltrs
Sensitivity 2.83V/1m 89 dB
Power Handling
Long-term Max Power IEC 18.3 60 W
Short Term Max power IEC 18.2 90 ohm
Voice Coil and Magnet Parameters
Voice Coil Diameter 25 mm
Voice Coil Height 10.5 mm
Height of the Gap 4 mm

Frequency

Mechanical Dimensions