Transcript
Crescendo 8M
crescendo
8M
T
he Crescendo 8M is designed as a dedicated mid driver, providing high output, low distortion midrange from 250 Hz to 4 kHz. Built around a die cast chassis, the driver features a 2 inch voice coil driven by a non inductive motor system which dramatically reduces third harmonic and intermodulation distortion. The unit exhibits an
average sensitivity of 98 dB over the operating band, with an A.E.S. power handling of 175 Watts. The combinded heatsinking effect of the large magnet structure and diecast chassis yields low power compression, producing maximum output levels of over 120 dB. the Crescendo 8M is best mounted in sealed enclosures of 1.5 to 5 litres.
8.25' 209.5 mm
Mounting information Overall Diameter Width Across Flats Flange Thickness Baffle Hole Diameter, Front Mount Gasket Supplied Fixing Holes 9'' 8. mm 6 22
Depth Weight Recommended Enclosure Volume Volume Displaced by Driver Shipping Weight Packing Carton Dimensions
3.8'' 96.5 mm
6.18'' 157 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
8.9 inch/226 mm 8.25 inch/209.5 mm 0.28 inch/7 mm 7.33 inch/186 mm Rear 4 x 0.218 inch diam on 8.41 PCD 4 x 5.5 mm diam on 213.5 PCD 3.8 inch/96.5 mm 10.1 lb/4.6 kg 0.05-0.18 cu ft/1.5-5 litres 0.046 cu ft/1.3 litres 10.6 lb/4.8 kg 235 x 235 x 165 mm
Crescendo 8M
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 Aluminium Magnet Ferrite Chassis Die Cast Aluminium Cone Curvilinear Paper Surround/Edge Termination Polyvinyl Damped Double Half Roll Linen Dust Dome Solid Paper Connectors 4.8 by 0.5 mm tag/solder Terminals Polarity Positive voltage at red terminal causes forward motion of cone
200 100 70 50 40 30
Ohms
8 inch/200 mm 8Ω 175 (A.E.S.)1 115/121 dB 4.7 dB 150 Hz-4.5 kHz 98 dB 250 Hz-4 kHz 80 Hz 18.8 grams 13.27 7.5 Ω 6.46 inch/0.164 mm 1.17 Tesla 0.35 inch/9 mm 0.47 inch/12 mm 41.2 feet/12.5 m 65 oz/1.83 kg 0.35 inch/9 mm 0.06 litres 2.0 inch/50.8 mm
Construction materials
Impedance
Thiele-small parameters
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 Recommended Frequency Range filtered at 12 dB/octave 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
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
80 Hz 5.6 Ω 0.284 0.299 5.61 18.8 211 13.27 Tesla metres 13.14 litres 2.18 % 0.021 m2 1.5 mm
100 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
1.5 Litres 2.5 Litres 5 Litres
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.
