Loudspeaker protection circuit

space2000 · 2nd April 2008, 06:28 AM

hi, i am looking for "Loudspeaker protection circuit "

thank you.

jormajj · 2nd April 2008, 06:50 AM

http://sound.westhost.com/project33.htm

Nordic · 2nd April 2008, 07:20 AM

If yu can find upc1237 chips, you can follow the schematic in the datasheet (available through google)

space2000 · 2nd April 2008, 07:23 AM

hi Nordic, thank you for your help. i am not good in electronics. its looks like not comlete circuit. i really didn't understand this web. thank you again for your help.

space2000 · 2nd April 2008, 07:28 AM

upc1237 not available in here. thank you.

peranders · 2nd April 2008, 07:32 AM

Quote:

Originally posted by space2000
hi Nordic, thank you for your help. i am not good in electronics. its looks like not comlete circuit. i really didn't understand this web. thank you again for your help.

What did you no understand and what sort of protection do you need? What do you want to protect the speaker against?

kimbo · 2nd April 2008, 11:46 AM

If you are "...not good in electronics' you could try a kit such as this
http://www.jaycar.com.au/productView...=&SUBCATID=557

Universal Speaker Protection and Muting Module Kit from Silicon Chip magazine July 2007

ddanbo · 5th April 2008, 02:28 AM

Couple of threads here:

Loudspeaker Protector

Loudspeaker Protector, my version

d3imlay · 5th April 2008, 09:55 AM

Quote:

Originally posted by space2000
upc1237 not available in here. thank you.

I built a drop in output relay board for Phase Linear 400's using the UPC1237. I love this chip. So easy to work with. They only work up to 60VDC. The Phase Linear rails run at about 75VDC so I used a 25volt 5watt zener leaving me with a 50 Volt power supply. I'm using a 48VDC relay and the zener doesn't even get warm.

I nearly panicked when I started having trouble finding the chips. Then I found them at Futurlec and ordered 20 as I thought they were suspect. Futurlec site It took about 2 weeks for them to get here. In the mean time MCM got a shipment in and I bought all 50 they had. I haven't tried the ones from Futurlec yet, but I assume they'll work.

d3imlay · 5th April 2008, 10:21 AM

Quote:

Originally posted by jormajj
http://sound.westhost.com/project33.htm

I've used this board and it works fine. Care is required as the tracks are close to components and there is no solder mask. Size matters when it comes to cost and so does solder mask.

2nd April 2008, 06:28 AM	#1
space2000 diyAudio Member Join Date: Mar 2008	Loudspeaker protection circuit hi, i am looking for "Loudspeaker protection circuit " thank you.

2nd April 2008, 07:23 AM	#4
space2000 diyAudio Member Join Date: Mar 2008	thanks for address hi Nordic, thank you for your help. i am not good in electronics. its looks like not comlete circuit. i really didn't understand this web. thank you again for your help.

2nd April 2008, 07:28 AM	#5
space2000 diyAudio Member Join Date: Mar 2008	upc1237 upc1237 not available in here. thank you.

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2nd April 2008, 06:50 AM	#2
jormajj diyAudio Member Join Date: Nov 2002 Location: Finland	http://sound.westhost.com/project33.htm

2nd April 2008, 07:20 AM	#3
Nordic diyAudio Member Join Date: Sep 2005	If yu can find upc1237 chips, you can follow the schematic in the datasheet (available through google)

2nd April 2008, 11:46 AM	#7
kimbo diyAudio Member Join Date: Mar 2004 Location: Melbourne	If you are "...not good in electronics' you could try a kit such as this http://www.jaycar.com.au/productView...=&SUBCATID=557 Universal Speaker Protection and Muting Module Kit from Silicon Chip magazine July 2007

5th April 2008, 02:28 AM	#8
ddanbo diyAudio Member Join Date: Jan 2006 Location: Edmonton, AB	Couple of threads here: Loudspeaker Protector Loudspeaker Protector, my version

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