Transcript
Crescendo 12MB
crescendo
12MB
T
he Crescendo mid bass drivers are intended for use in two way ported enclosures such as the classic bass driver plus horn tweeter or compression driver format. All feature die cast chassis with long throw motor systems and high linearity suspensions allowing solid bass reproduction at high power levels. The drivers exhibit smooth frequency
responses to give a balanced tonal characteristic when properly matched to appropriate high frequency drivers. The 12MB is designed for use in 25 to 80 litre ported enclosures and features a 2.5 inch voice coil, 300 Watt power handling and 97.5 dB sensitivity.
12.19'' 309.5 mm
Mounting information mounting information Overall Diameter Width Across Flats Flange Thickness Baffle Hole Diameter, Front Mount Gasket Supplied Fixing Holes '' m 13 2 m 0.
33
Depth Weight Recommended Enclosure Volume Volume Displaced by Driver Shipping Weight Packing Carton Dimensions
5.33'' 135.5 mm
7.09'' 180 mm Fane Acoustics Ltd. Unit 1, Millshaw Park Avenue Millshaw Park Industrial Estate Leeds LS11 0LR, England Tel: +44 (0) 113 277 8600 Fax: +44 (0) 113 277 8700 e-mail:
[email protected] www.fane-acoustics.co.uk
13 inch/330.2 mm 12.19 inch/309.5 mm 0.305 inch/7.8 mm 11.03 inch/281 mm Rear 4 x 0.218 inch diam on 12.5 PCD 4 x 5.5 mm diam on 318.0 PCD 5.33 inch/135.5 mm 14.8 lb/6.7 kg 0.88-2.83 cu ft/25-80 litres 0.095 cu ft/2.7 litres 17.0 lb/7.7 kg 340 x 340 x 222 mm
Crescendo 12MB
Frequency response data
Electro mechanical specifications
120
110
100
SPL dB
90
80
70
60
50 20
50
100
200
500
Hz
1k
Fundamental 10 % Power Fundamental on-axis 1 Watt Fundamental 45° off-axis 1 Watt 2nd Harmonic 10 % Power 3rd Harmonic 10 % Power
2k
5k
10k
20k
Data measured using swept sine wave input on an open baffle of dimensions 2.5 x 3.7 metres with a microphone distance of 1 metre.
Coil Former Fibreglass Voice Coil Material Copper Magnet Ferrite Chassis Die Cast Aluminium Cone Curvilinear Paper Surround/Edge Termination Polyvinyl Damped Double Half Roll Linen Dust Dome Solid Paper Connectors Push Button Spring Terminals Polarity Positive voltage at red terminal causes forward motion of cone
200 100 70
Thiele-small parameters
50 40 30
Ohms
12 inch/305 mm 8Ω 300 (A.E.S.)1 119/125 dB 4 dB 45 Hz-3.5 kHz 97.5 dB 50 Hz 55 grams 17.6 7Ω 10.03 inch/255 mm 1.28 Tesla 0.31 inch/8 mm 0.65 inch/16.6 mm 63 feet/19.2 m 78 oz/2.2 kg 0.47 inch/12 mm 0.440 litres 2.5 inch/63.7 mm
Construction materials
Impedance
20
10 7 5 4
Nominal Chassis Diameter Impedance Power Handling Maximum Output Continuous/Peak Power Compression at Rated Power Usable Frequency Range (-6 dB) Average Sensitivity (in above range) 1W/1m Resonance Moving Mass inc. Air Load BL Product (Newtons/amp) Minimum Impedance (Zmin) Effective Piston Diameter Flux Density Magnetic Gap Depth Coil Winding Height Voice Coil Length Magnet Weight Maximum Cone Displacement Peak Displacement Volume of Cone, Vd Voice Coil Diameter
10
20
50
100
200
500
1k
2k
5k
10k
Hz
Computer predicted bass response 100
Resonant frequency fs D.C resistance Re Qts Qes Qms Mms (grams) Cms (microns per Newton) BL product Vas Reference efficiency ‹o Piston area Sd Xmax
50 Hz 5.6 Ω 0.295 0.314 4.8 55 184 17.6 Tesla metres 67 litres 2.58 % 0.051 m2 4.3 mm
1 A.E.S. power handling test. Pink noise bandpass filtered at 12 dB per octave with cutoff frequencies of 30 Hz and 300 Hz. Driver mounted in free air, test signal applied at rated power for two hours.
dB
90
80
70
60 20
30
50
70
100
150
200
200
500
Frequency Hz
25L fb 70Hz 50L fb 67Hz 80L fb 58Hz
Fane Acoustics Ltd. Unit 1, Millshaw Park Avenue Millshaw Park Industrial Estate Leeds LS11 0LR, England Tel: +44 (0) 113 277 8600 Fax: +44 (0) 113 277 8700 e-mail:
[email protected] www.fane-acoustics.co.uk
Fane Acoustics Ltd. operates a policy of continuous product development and reserves the right to change specifications without notice.
