Transcript
Crescendo 15B
crescendo
15B
T
he Crescendo 15B and 18B are intended for high level, high power low frequency reproduction in ported enclosures. They feature vented die cast chassis and composite glass fibre and black anodized aluminium coil formers, yielding extremely low thermal compression. Both employ high rigidity cone membranes in order to offer freedom from breakup and associated distortion at
extremely high sound pressure levels. Extended levels of linear excursion are possible due to long throw motor systems coupled with large flexure suspensions. The 15B is suitable for use in 70 to 200 litre ported enclosures and features a 3 inch voice coil, 400 watt power handling and 96 dB sensitivity. It is capable of delivering bass down to 39 Hz (-6 dB) in a 125 litre cabinet.
15.25' 387.4 mm
Mounting information
'' m 16 4 m 6.
40
Overall Diameter 16 inch/406.4 mm Width Across Flats 15.25 inch/387.4 mm Flange Thickness 0.305 inch/7.8 mm Baffle Hole Diameter, Front Mount 13.85 inch/352 mm Baffle Hole Diameter, Rear Mount 14.00 inch/355 mm Gasket Supplied Front & rear Fixing Holes 4 x 0.28 inch diam on 15.5 PCD, 8 x 0.28 diam on 14.56 PCD 4 x 7.1 mm diam on 393.7 PCD, 8 x 7.1 diam on 370 PCD Depth 6.46 inch/164 mm Weight 18.74 lb/8.5 kg Recommended Enclosure Volume 2.47-7.06 cu ft/70-200 litres Volume Displaced by Driver 0.177 cu ft/5 litres Shipping Weight 21.8 lb/9.9 kg Packing Carton Dimensions 415 x 415 x 250 mm
6.46'' 164 mm
7.48'' 190 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
Crescendo 15B
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 and Black Anodised Aluminium 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
100 80 60 50 40
Thiele-small parameters
30 Ohms
15 inch/381 mm 8Ω 400 (A.E.S.)1 118/124 dB 4.5 dB 33 Hz-2 kHz 96 dB 34 Hz 111 grams 22.4 7Ω 12.76 inch/324 mm 1.1 Tesla 0.39 inch/10 mm 0.76 inch/19.4 mm 82 feet/25 m 93 oz/2.65 kg 0.55 inch/14 mm 0.770 litres †3.0 inch/77 mm
Construction materials
Impedance
20
10 8 6 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
34 Hz 5.6 Ω 0.238 0.265 2.29 111 197 22.4 Tesla metres 188 litres 2.69 % 0.082 m2 4.7 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
70L fb 55Hz 125L fb 50Hz 200L fb 44Hz
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.
