Velleman K4700 with +-60V ?

Session · 7th January 2010, 12:24 PM

I have a UCD 400 amp with 800VA torroid +-60V DC. Will Velleman kit K4700 be able to handle this?

DubbLinn · 7th January 2010, 01:29 PM

I don't fully understand your question because the K4700 is for speaker protection only, and is not contolling the trafo you mentioned. The K4700 is connected to the mains and has its own PSU/trafo. The speakers are connected to the relays and the ground wire is also connected to the PCB.
Do you think the K4700 is a soft start module? because it is not.

DubbLinn · 7th January 2010, 01:34 PM

here's a link to the manual (scroll down)-
2-Channel Loudspeaker Protection Kit (K4700)
please read

Session · 7th January 2010, 02:28 PM

I am sorry. I was only mentioning that to be sure it can handle the power to the speakers. So you say it is fine?

DubbLinn · 7th January 2010, 02:42 PM

The relays can handle up to 10amps. I think that should be plenty.

Session · 7th January 2010, 02:47 PM

I see... Thank you. I will order one and test it out

adason · 7th January 2010, 03:38 PM

I am using this velleman speaker protection circuit, it works great, its well designed, I like it

Session · 7th January 2010, 05:05 PM

Perfect! No use in blowing up the speakers when this is so cheap

richie00boy · 7th January 2010, 05:13 PM

Quote:

Originally Posted by DubbLinn

The relays can handle up to 10amps. I think that should be plenty.

They can pass 10A, but they will struggle with 60V DC at several amps to break though - check out their VA breaking capacity. The only alternative is huge relays but that probably requires a new board, beyond your scope I suspect. So try them, got to be better than nothing.

adason · 07:17 PM

that speaker protection circuit will never see +/-60 volts, it cuts speakers off at 1 vold DC on the ouput...so no worries...

I do not understand why would anyone even brought up the power supply voltage of the amplifier into the equation...that completely does not matter!

you can connect the DC protection curcuitry even on 400 volt amp, it senses anything above 1 volts and turns off....no more current!

7th January 2010, 12:24 PM	#1
Session diyAudio Member Join Date: Sep 2005	Velleman K4700 with +-60V ? I have a UCD 400 amp with 800VA torroid +-60V DC. Will Velleman kit K4700 be able to handle this?

7th January 2010, 07:14 PM	#10
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	that speaker protection circuit will never see +/-60 volts, it cuts speakers off at 1 vold DC on the ouput...so no worries... I do not understand why would anyone even brought up the power supply voltage of the amplifier into the equation...that completely does not matter! you can connect the DC protection curcuitry even on 400 volt amp, it senses anything above 1 volts and turns off....no more current! Last edited by adason; 7th January 2010 at 07:17 PM.

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7th January 2010, 01:29 PM	#2
DubbLinn diyAudio Member Join Date: Aug 2008	I don't fully understand your question because the K4700 is for speaker protection only, and is not contolling the trafo you mentioned. The K4700 is connected to the mains and has its own PSU/trafo. The speakers are connected to the relays and the ground wire is also connected to the PCB. Do you think the K4700 is a soft start module? because it is not.

7th January 2010, 01:34 PM	#3
DubbLinn diyAudio Member Join Date: Aug 2008	here's a link to the manual (scroll down)- 2-Channel Loudspeaker Protection Kit (K4700) please read

7th January 2010, 02:28 PM	#4
Session diyAudio Member Join Date: Sep 2005	I am sorry. I was only mentioning that to be sure it can handle the power to the speakers. So you say it is fine?

7th January 2010, 02:42 PM	#5
DubbLinn diyAudio Member Join Date: Aug 2008	The relays can handle up to 10amps. I think that should be plenty.

7th January 2010, 02:47 PM	#6
Session diyAudio Member Join Date: Sep 2005	I see... Thank you. I will order one and test it out

7th January 2010, 03:38 PM	#7
adason diyAudio Member Join Date: Nov 2004 Location: home sweet home	I am using this velleman speaker protection circuit, it works great, its well designed, I like it

7th January 2010, 05:05 PM	#8
Session diyAudio Member Join Date: Sep 2005	Perfect! No use in blowing up the speakers when this is so cheap

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