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Old 27th February 2006, 12:40 PM   #1
cld1354 is offline cld1354  Italy
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Location: Ancona
Default 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
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Old 27th February 2006, 04:38 PM   #2
sreten is offline sreten  United Kingdom
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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.
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Old 27th February 2006, 09:23 PM   #3
cld1354 is offline cld1354  Italy
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>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
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Old 1st January 2007, 04:52 PM   #4
cld1354 is offline cld1354  Italy
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anyone can help me ?
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