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Class D Switching Power Amplifiers and Power D/A conversion

How could I remote turn on a sure 4x100W amp in a car setup?
How could I remote turn on a sure 4x100W amp in a car setup?
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Old 25th October 2010, 06:43 AM   #1
nicoberndt is offline nicoberndt  Germany
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Default How could I remote turn on a sure 4x100W amp in a car setup?

Hi everyone,

I am from Germany and during a recent visit to Arizona I purchased two of the sure 4x100 W amps. They run nicely so far, one at home and since yesterday I have one in my car driving the mid/high section of my frontspeakers.

There is one major issue using them in the car though: I can not switch them on via remote like the rest of my equipment. Now I would not be happy with simply putting a relay (is relay correct for a triggered switch?) in the power supply line. I spotted a 5V regulator on the board. What is it there for? - Any chance to switch the 5V line to power off the board?

Any other suggestions?

Many thx!
Nico Berndt
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Old 25th October 2010, 08:42 AM   #2
terralune is offline terralune  Norway
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What's wrong with using a relay? It's the simplest solution and will work quite well as far as I know.
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Old 25th October 2010, 09:53 AM   #3
ultra is offline ultra
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Hi Nico,
if you do not mind a small current running to the amp at all times,
then you can use a really small relay to un-mute the amp.
Please check the datasheet of power consumption when the in mute mode.
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Old 27th October 2010, 08:56 AM   #4
nicoberndt is offline nicoberndt  Germany
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Hi,

sory I didn't reply earlier - I wasn't notified of responses..

I just thought such a big relay would not be very elegant if there was a smarter way. Worst case I would have to go for it, sure..

Having the amp drawing power at all times does not sound to good, but I'll check the datasheet, thx for the hint.
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Old 27th October 2010, 09:10 AM   #5
ampimp is offline ampimp  United Kingdom
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Default semicondutor relay

How about a semiconductor relay with no moving parts??
Ian
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Old 27th October 2010, 10:38 AM   #6
nicoberndt is offline nicoberndt  Germany
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My concern is the throughput. Run at 12V (13.8V) the amp can draw over 25A. I would feel much better just switching off a tiny supply voltage that would cause the amp simply not to start up.
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