do amps have parasitic load on car batteries?

hakentt · 21st June 2008, 05:40 AM

I got nice Hifonic brutus 1200d amps in my car and after I leave the car to sit for a week battery dies. But when I disconect the amp from the battery I can leave the car sit two weeks and it would not drain. I did the parasitic load test and seems to me that amps draws some juice at first second of connecting it to charge the capacitors but then it stops. So I don't know about this, any opinions?

Speeed3 · 21st June 2008, 06:39 AM

Firts make sure, that amp isn't on. One strain of power cable touch a remoteterminal etc.

Amps shouldn't draw current if there of, but I have seen amp, that was broken, but produced sound. And it drawed current when it was of. Half of power supply was gone.

luka · 21st June 2008, 07:03 AM

Hi

If you think it is problem in amp...is it possible that your battery isn't charged fully? Amp should, I think, use <1mA I think, since everything inside has at that point M ohme resistence, even clock will draw more current. I had similar problem, my battery was not charged at all, music would play, but motor could do only one or two turns, after using car next day for say 2h, I didn't use music, I charged battery fully! Before this I had only 13.8v with engine on, now it is 14.4v or something like that

mandude · 22nd June 2008, 01:35 AM

Yeah, the amp *shouldn't* be drawing any current, at all.

Keep in mind, you live in Phoenix (looks like), and car batteries and the heat don't get along too well.

21st June 2008, 05:40 AM	#1
hakentt diyAudio Member Join Date: Feb 2008	do amps have parasitic load on car batteries? I got nice Hifonic brutus 1200d amps in my car and after I leave the car to sit for a week battery dies. But when I disconect the amp from the battery I can leave the car sit two weeks and it would not drain. I did the parasitic load test and seems to me that amps draws some juice at first second of connecting it to charge the capacitors but then it stops. So I don't know about this, any opinions?

21st June 2008, 07:03 AM	#3
luka diyAudio Member Join Date: Sep 2005 Location: in Slovenia :)	Hi If you think it is problem in amp...is it possible that your battery isn't charged fully? Amp should, I think, use <1mA I think, since everything inside has at that point M ohme resistence, even clock will draw more current. I had similar problem, my battery was not charged at all, music would play, but motor could do only one or two turns, after using car next day for say 2h, I didn't use music, I charged battery fully! Before this I had only 13.8v with engine on, now it is 14.4v or something like that __________________ home page @ http://www.classdaudio.co.cc @ 24/7 all year long I FEEL SLOVENIA

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Op amps: output impedance and load resistance	mudihan	Chip Amps	17	20th April 2009 08:09 AM
chip amps into 6 ohm load	Bengali	Chip Amps	1	25th October 2006 06:15 PM
Quad 405 Parasitic Osacillation!	Craig405	Solid State	29	7th April 2006 08:08 PM
Parasitic oscillation	ACR	Solid State	1	8th June 2005 03:27 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

21st June 2008, 06:39 AM	#2
Speeed3 diyAudio Member Join Date: Dec 2006	Firts make sure, that amp isn't on. One strain of power cable touch a remoteterminal etc. Amps shouldn't draw current if there of, but I have seen amp, that was broken, but produced sound. And it drawed current when it was of. Half of power supply was gone.

22nd June 2008, 01:35 AM	#4
mandude diyAudio Member Join Date: Jun 2008	Yeah, the amp shouldn't be drawing any current, at all. Keep in mind, you live in Phoenix (looks like), and car batteries and the heat don't get along too well.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)