Transcript
Crescendo 18B
crescendo
18B
T
he Crescendo 18B and 15B 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 18B is suitable for use in 125 to 400 litre ported enclosures and features a 3 inch voice coil, 400 watt power handling and 97,5 dB sensitivity. It is capable of delivering bass down to 35 Hz (-6 dB) in a 200 litre cabinet.
18' 457 mm
Mounting information
' .1' m 19 5 m 48
Overall Diameter 19.1 inch/485 mm Width Across Flats 18 inch/457 mm Flange Thickness 0.465 inch/11.8 mm Baffle Hole Diameter, Front Mount 16.53 inch/420 mm Baffle Hole Diameter, Rear Mount 16.33 inch/414 mm Gasket Supplied Front & Rear Fixing Holes 8 x 7 mm ø on 468 mm PCD and 438.15 mm PCD 8 x 0.275 inch ø on 18.425 inch PCD and 17.25 inch PCD Depth 7.38 inch/187 mm Weight 21.2 lb/9.6 kg Recommended Enclosure Volume 4.41-14.12 cu ft/125-400 litres Volume Displaced by Driver 0.226 cu ft/6.4 litres Shipping Weight 25.6 lb/11.6 kg Packing Carton Dimensions 485 x 485 x 276 mm
7.38'' 187 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 18B
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 70 50 40 30
Ohms
18 inch/457 mm 8Ω 400 (A.E.S.)1 120/126 dB 4.5 dB 28 Hz-1 kHz 97.5 dB 30 Hz 135 grams 22.4 7Ω 14.84 inch/377 mm 1.1 Tesla 0.39 inch/10 mm 0.76 inch/19.4 mm 82 feet/25m 93 oz/2.65 kg 0.55 inch/14 mm 1.05 litres 3.0 inch/77 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 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
30 Hz 5.6 Ω 0.254 0.285 2.34 135 208 22.4 Tesla metres 363 litres 3.32 % 0.112 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
125L fb 45Hz 200L fb 45Hz 400L fb 35Hz
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.
