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-   -   bresc Audio fundament 1.1 - Power amp Schematic wanted (http://www.diyaudio.com/forums/subwoofers/218679-bresc-audio-fundament-1-1-power-amp-schematic-wanted.html)

tiefbassuebertr 28th August 2012 01:33 PM

bresc Audio fundament 1.1 - Power amp Schematic wanted
 
I need the schematic diagram of this subwoofer electronics. The manufacturer of the filter and amplifier section was the German brand Thommessen.
Who can help?

tiefbassuebertr 10th September 2012 10:46 AM

1 Attachment(s)
Schematic is present in the meantime - but I got the hint explicit, that I should not publish the schematic diagram.
Very interesting is the 24 db high pass filter for protect the bass transducer against excessive cone excursions.
In this case I have start this thread:
http://www.diyaudio.com/forums/chip-...ml#post3157923

tiefbassuebertr 28th June 2015 03:39 PM

I have on my desk a damaged device cause a burned voice coil. The driver model is the "M22WR-09-08" from D.S.T. (Tymphany), formerly Vifa.
Datasheets are here:
http://www.diyaudio.com/forums/multi...ml#post3157683
In case of a closed box this would be an easy task. But this device is a band pass and thus the effects by change of the thiele small parameter brings other sound effects as usual at closed boxes.
Therefore the question: which driver from currently production (or at least currently available) is suited?
Thanks for advices.


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