dc and low freq protections

cld1354 · 27th February 2006, 12:40 PM

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

cld1354 · 1st January 2007, 04:52 PM

anyone can help me ?

27th February 2006, 12:40 PM	#1
cld1354 diyAudio Member Join Date: Apr 2003 Location: Ancona	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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27th February 2006, 04:38 PM	#2
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	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.

27th February 2006, 09:23 PM	#3
cld1354 diyAudio Member Join Date: Apr 2003 Location: Ancona	>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

1st January 2007, 04:52 PM	#4
cld1354 diyAudio Member Join Date: Apr 2003 Location: Ancona	anyone can help me ?

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