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-   -   dc and low freq protections (http://www.diyaudio.com/forums/multi-way/74868-dc-low-freq-protections.html)

cld1354 27th February 2006 12:40 PM

dc and low freq protections
 
Hello,
I bought the dc speakers protections VellemanK4700. I want to use these into a multiway active speakers system so I want that the kit can detects not only a DC at the amp output but also signals below a fixed frequency ( about 100 hz for one channel and 800 Hz for the other channel ). How can I do this? Replacing the C7,C8 (C9,C10) caps?

Link to the circuit http://www.velleman.be/downloads/0/i...nual_k4700.pdf

Very thanks

sreten 27th February 2006 04:38 PM

Hi,

the obvious question is why ? what fault conditions would
cause unwanted frequencies at the outputs of your amplifiers ?

A much simpler protection scheme for your mids and tweeters
is fitting series capacitors to each driver, DC and low AC protection.

:)/sreten.

cld1354 27th February 2006 09:23 PM

>the obvious question is why ? what fault conditions would
>cause unwanted frequencies at the outputs of your amplifiers ?

Because it just happened to me.
Due to a bad contact in the connector inside the behringer dcx 2496 crossover, my scanspeak 9700 tweteer fried receiving an high volume 'scratch'.

>A much simpler protection scheme for your mids and tweeters
>is fitting series capacitors to each driver, DC and low AC >protection.

I agree, but the approach to an active multiway system is to eliminate the passive components:angel:

cld1354 1st January 2007 04:52 PM

anyone can help me ?


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