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The Crescendo (Grande) Speaker System

3.2 Crescendo Subwoofer

The   Crescendo   Subwoofer   uses   an   enclosure   that   is   a  “cross” 
between a traditional vented box and a transmission line, called a 
mass-loaded transmission line. 

The   enclosure   material   comes   down   to   similar   choices   as   the 
Crescendo   2-way   speaker.   Make   sure   all   seams   etc.   are   well 
sealed.

Again,   you   can   choose   other 
mechanical   arrangements   as   long 
as   you   keep   the   volume   and   port 
cross-section as well as port length. 

The Plate Amplifier is mounted into 
the   side   of   the   enclosure   in   a 
suitable cutout. 

The   Amplifier   includes   the 
necessary   sealing   strips,   to   make 
sure the mounting is air-tight and the 
correct mounting screws.

The   Dynafone   driver   is   directly 
connected to the output leads fitted 
to the Amplifier.

Summary of Contents for Crescendo

Page 1: ...diyhifisupply The Crescendo Grande Speaker System ...

Page 2: ... DRIVER SPECIFICATIONS 2 3 DYNAFONE SUBBASS DRIVER SPECIFICATIONS 3 CRESCENDO ENCLOSURE DESIGNS 3 1 CRESCENDO 2 WAY 3 2 CRESCENDO SUBWOOFER 4 CRESCENDO CROSSOVER AND CONNECTIONS 4 1 CRESCENDO 2 WAY CROSSOVER 4 2 CRESCENDO SUBWOOFER CONNECTIONS 5 CRESCENDO ASSEMBLY PICTORIAL 6 CRESCENDO CONNECTIONS AND SETUP 6 1 CRESCENDO SETUP 6 2 CRESCENDO CONNECTIONS 7 TECHNICAL DATA ...

Page 3: ...ontal and 30 degrees vertical Such controlled dispersion over such a wide frequency range ensures that even in acoustically difficult rooms and the midrange and treble remain from excessive reflections and room reverb There is an option for bass modules making the Crescendo into the the Crescendo Grande System We wanted a cabinet that could slip under the Crescendos and take the place of the stand...

Page 4: ...rim edge Cone Material Aluminium Alloy Impedance 6Ohm Power Handling 50W continous 100W programme Xmax 3mm peak peak Re 5 2 Ohm Moving Mass 19 5 gramm Fs 90Hz Qts 0 45 Spl 2 83V 1m 98db Rec Enclosure 30 Liter Net Volume 70 Hz Port Tuning 110cm2 port crossection 13cm port length Frequency AND Impedance Response in recommended enclosure ...

Page 5: ...er System 2 2 Crescendo HF Driver Specifications Dimensions 220mm X 275mm Waveguide Material Aluminium Alloy Diaphragm Material Kapton Ribbon Surface 91cm2 Fs 480Hz Impedance 6Ohm Power Handling 60W continous 120W programme Spl 2 83V 1m 102db ...

Page 6: ... Cone Material Aluminium Alloy Impedance 8 Ohm Power Handling 200W continous 400W programme Xmax 14mm peak peak Re 7 6 Ohm Moving Mass 75 gramm Fs 35Hz Qts 0 34 Spl 2 83V 1m 87 5db Rec Enclosure 33 Liter Net Volume 26 Hz Port Tuning 110cm2 port crossection 95cm port length Frequency AND Impedance Response in recommended enclosure ...

Page 7: ...th good filling properties is recommended for any of the wood materials Grip Fill the professional version of liquid nails or similar work well as can resin based glues Stone requires special glues The Back Panel is kept removable to allow the low frequency drivers to be mounted from behind Unless you wish to use an external enclosure for your crossover building it on the removable back panel allo...

Page 8: ...he Crescendo 2 way speaker Make sure all seams etc are well sealed Again you can choose other mechanical arrangements as long as you keep the volume and port cross section as well as port length The Plate Amplifier is mounted into the side of the enclosure in a suitable cutout The Amplifier includes the necessary sealing strips to make sure the mounting is air tight and the correct mounting screws...

Page 9: ...y The Crescendo Grande Speaker System 4 Crescendo Crossover and connections 4 1 Crescendo 2 Way Crossover The Crossover is as shown below One possible way to assemble this crossover is shown on the right hand side ...

Page 10: ... times the power to to allow the subwoofer to match the Crescendo 2 Way We generally do not recommend to use line level feeds or active crossovers instead simply connect the speaker level feed via an adapter cable as shown to the RCA Input L or R does not matter The final crossover and level settings for the Subwoofer depend at least to a degree on room size and personal preference As a starting p...

Page 11: ...diyhifisupply The Crescendo Grande Speaker System 5 Crescendo Assembly Pictorial ...

Page 12: ...diyhifisupply The Crescendo Grande Speaker System ...

Page 13: ...diyhifisupply The Crescendo Grande Speaker System ...

Page 14: ... sound quality but is essentially to keep the speakers from wandering about We recommend spikes or cones Equally it is essential to create an interface between Subwoofer and 2 Way that is rigid or at least prevents 2 Ways from moving e g small patches of blue tack 6 2 Crescendo Connections As designed the Crescendo 2 Way has binding pots for bi wiring If you do not use Bi Wiring speaker cables you...

Page 15: ...diyhifisupply The Crescendo Grande Speaker System You also need to connect the inputs of the subwoofer amplifier as shown in the example below ...

Page 16: ...r with electronic crossover Midrange One 8 inch 21 cm Carbon Fiber Paper Tweeter One 14in2 91cm2 magnetic planar driver Sensitivity 98 dB 2 83V one meter 1 kHz Impedance 8 ohms 5 ohms minimum 300 Hz Frequency Resp 3 dB 26 Hz 20kHz Min rec power 2 watts per channel Overall Dimensions Height 110 cm w o spikes Width 25 6 cm Depth 35 6 cm ...

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