car amp voltage

Arnejo · 14th October 2008, 06:36 AM

I am new to the art of gaincloning, as well as to this forum, and planning to build an car amp. What I don't grip is how to get +/- voltage from a single battery setup. Is it possible?

frank1 · 14th October 2008, 06:57 AM

Yes, with a DC-DC converter or switched mode power supply.

Frank

jaycee · 14th October 2008, 08:30 AM

See for example, http://sound.westhost.com/project89.htm

This is an advanced project. You will need an oscilloscope, ability to wind a custom transformer, and the ability to make PCB's to build this sort of thing. If that is beyond your scope, do not attempt it as you risk causing a fire in your car.

Arnejo · 14th October 2008, 01:12 PM

Quote:

Originally posted by jaycee
See for example, http://sound.westhost.com/project89.htm

This is an advanced project. You will need an oscilloscope, ability to wind a custom transformer, and the ability to make PCB's to build this sort of thing. If that is beyond your scope, do not attempt it as you risk causing a fire in your car.

A bit to advanced I'm afraid. One thing that puzzles me is how to connect ground from the amp because to my understanding - and ground will be the same thing on a cars electric system, or have I missed something?

jaycee · 14th October 2008, 01:36 PM

Not sure what you mean. The amp ground would connect to common ground, which all ends up connectd to the car batterys negative terminal.

nikwal · 15th October 2008, 10:09 AM

Two windings with earth in the center maybe or something like that . Anyway, it's possible to keep the transformer small due to higher switching frequency, it's not 50/60Hz anymore. So basically, chop voltage to pieces and push-pull it through a transformer then rectify it and feed back to know what pulsewith to use. Or if it's boost converter without transformer, it's almost like, draw current through a coil and take care of the higher voltage that comes back when releasing the tension ,due to the nature of a coil. but then it will be somewhat tricky to get a negative voltage.
Anyway I put some simple diy amplifier inside a friends car amp, ripped out the original amp. board first and used only the dcdc, worked very good, lets just say that the dcdc must have been better than the amps in that box.

14th October 2008, 06:36 AM	#1
Arnejo diyAudio Member Join Date: Oct 2008	car amp voltage I am new to the art of gaincloning, as well as to this forum, and planning to build an car amp. What I don't grip is how to get +/- voltage from a single battery setup. Is it possible?

15th October 2008, 10:09 AM	#6
nikwal diyAudio Member Join Date: Aug 2005	Two windings with earth in the center maybe or something like that . Anyway, it's possible to keep the transformer small due to higher switching frequency, it's not 50/60Hz anymore. So basically, chop voltage to pieces and push-pull it through a transformer then rectify it and feed back to know what pulsewith to use. Or if it's boost converter without transformer, it's almost like, draw current through a coil and take care of the higher voltage that comes back when releasing the tension ,due to the nature of a coil. but then it will be somewhat tricky to get a negative voltage. Anyway I put some simple diy amplifier inside a friends car amp, ripped out the original amp. board first and used only the dcdc, worked very good, lets just say that the dcdc must have been better than the amps in that box. __________________ http://dsl.mine.nu (very enironmental friendly 5watt damn small linux server made from a compaq t1010 terminal)..

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14th October 2008, 06:57 AM	#2
frank1 diyAudio Member Join Date: Apr 2006 Location: Devon UK	Yes, with a DC-DC converter or switched mode power supply. Frank

14th October 2008, 08:30 AM	#3
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	See for example, http://sound.westhost.com/project89.htm This is an advanced project. You will need an oscilloscope, ability to wind a custom transformer, and the ability to make PCB's to build this sort of thing. If that is beyond your scope, do not attempt it as you risk causing a fire in your car.

14th October 2008, 01:36 PM	#5
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Not sure what you mean. The amp ground would connect to common ground, which all ends up connectd to the car batterys negative terminal.

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