Speaker A/B switch

Mikerobe · 3rd January 2007, 09:46 AM

I'm looking for an A/B switch rated above 100 amps that I can use to power a composite speaker cabinet without playing the in car speakes. They make tons of these for home entertainment systems but I can't find one compatible for a 125 wattper channel car amp. Crutchfield said they know of nothing, but there has to be some way to seperate the two sets of speakers.

Perry Babin · 3rd January 2007, 10:28 PM

Why wouldn't a toggle switch work to break the connection to the in-car speakers?

Mikerobe · 4th January 2007, 08:02 AM

I thought of that but I can't find a 12V toggle rated over 40 watts. If anyone knows who might sell one it would be greatly appreciated.

Perry Babin · 4th January 2007, 06:15 PM

Switches are typically rated in current, not in watts. Any switch rated for 6 amps or more will work.

A switch rated for 5 amps of current would likely work fine but 5 amps of current into 4 ohms is only 100 watts. Since the audio signal isn't constantly going to drive 5+ amps into the speaker, a good quality 5 amp switch should hold.

If, for some reason, you want to use a particular switch with lower current ratings, use it to control a couple of Bosch type relays. They will easily handle the load.

djdowdell · 6th January 2007, 07:33 PM

Try this page it might be helpful.
http://www.the12volt.com/relays/page5.asp

3rd January 2007, 09:46 AM	#1
Mikerobe diyAudio Member Join Date: Jan 2007	Speaker A/B switch I'm looking for an A/B switch rated above 100 amps that I can use to power a composite speaker cabinet without playing the in car speakes. They make tons of these for home entertainment systems but I can't find one compatible for a 125 wattper channel car amp. Crutchfield said they know of nothing, but there has to be some way to seperate the two sets of speakers.

3rd January 2007, 10:28 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Why wouldn't a toggle switch work to break the connection to the in-car speakers? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th January 2007, 06:15 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Switches are typically rated in current, not in watts. Any switch rated for 6 amps or more will work. A switch rated for 5 amps of current would likely work fine but 5 amps of current into 4 ohms is only 100 watts. Since the audio signal isn't constantly going to drive 5+ amps into the speaker, a good quality 5 amp switch should hold. If, for some reason, you want to use a particular switch with lower current ratings, use it to control a couple of Bosch type relays. They will easily handle the load. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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4th January 2007, 08:02 AM	#3
Mikerobe diyAudio Member Join Date: Jan 2007	I thought of that but I can't find a 12V toggle rated over 40 watts. If anyone knows who might sell one it would be greatly appreciated.

6th January 2007, 07:33 PM	#5
djdowdell diyAudio Member Join Date: Dec 2006	Try this page it might be helpful. http://www.the12volt.com/relays/page5.asp

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