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La Scala Power Amplifier

How to avoid overheating?

How to avoid overheating? - CanEVER AUDIO®

Besides the many benefits regarding sound, an amplifier running in pure Class A mode gets very hot!
To ensure a long lifespan for the electronics and a stable running amp, is a true challenge for the designer. That is why most Class A amplifiers come with huge heat sinks, which in many cases still get very hot and are unappealing to look at. For the LaScala PowerAmp the design goal was to use smarter solutions to reduce the heat from the amp.

The pictures above show a row of four heat pipes, including temperature controlled fans mounted from the underside, and four massive heat sinks mounted on top of the  MOSFETs. Looking at the LaScala PowerAmp from the outside, only the heat sinks on top are visible. The elegant style of the cabinet gives no sign that a massive Class A amp is working “under the hood”!

Following below are two pictures showing one of four heat pipes, which cool each of power MOSFETs.

The first picture shows the top side of the heat pipe showing the area where the MOSFET is glued to.

The second picture shows the bottom side of the heat pipe with its many narrow fins for effective heat dissipation. 

The third shows the low Speed Fans for the Air Circulation. The amplifier can work also with the fans powered off by setting the related parameter at the menu. The fans let only the air moves around the heatsinks. It increases the chimney effect.

With fans excluded the LaScala PowerAmp works at 15°C higher temperature with a reservoir left of 35°C. 

Conclusion

With the LaScala PowerAmp, CanEVER Audio has once again proven its skills in offering extremely innovative products to the world of high-end audio. Thanks to the ability to combine well-known and proven engineering concepts with innovative ideas, CanEVER Audio has been able to create a product with amazing sound quality, which is able to compete with the best amps on the market today.

For further information send us an e-mail, addressed to:  sales@canever.eu

 

 

Bibliography

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Investigation of Current Driven Loudspeakers, Dissertation presented at the 138th Convention of the Audio Engineering Society, Warsaw (2015), Schneider H., Agerkvist F., Knott A., Andersen M.A.E.

Distortion Improvement in the Current Coil of Loudspeakers, Dissertation presented at the 134th Convention of the Audio Engineering Society, Rome (2013), Pillonnet G., Sturtzer E., Rossignol T., Tournier P., Lemarquand G.

Effects of Acoustic Damping on Current-Driven Loudspeakers, Dissertation presented at the 122nd Convention of the Audio Engineering Society, Wien (2007), Bortoni R., Filho S.N., Silva H.S.

Current-Driving of Loudspeakers by Esa Meriläinen - Eliminating Major Distortion and Interference Effects by the Physically Correct Operation Method - Ed. Createspace, ISBN 1450544002, 2010.

Linear Audio by Jan Didden - Volume 12, pag. 183 - Book Review - Current-Driving of Loudspeakers by Hans Polak.

Current driving - The transconductance amplifier - Measurements.

Distortion reduction in moving-coil loudspeaker systems using current-drive technology, P. G. Mills, M. J. Hawksford, Journal of Audio Engineering Society 37 (3) (1989) pag. 129–148.