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car sound system in the home


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hairy_mcclary 
Member - Posts: 6
Member spacespace
Joined: May 02, 2006
Location: United Kingdom
Posted: May 08, 2006 at 11:54 AM / IP Logged  

Hi I have recently written off my car and had to remove the gear inside.

What I was wondering is, is it possible for a low price to use a transformer to connect to the head unit and amp to create a nice little system.

I have a JBL gto75.4 4-channel amp 520watts max.

And a Sony CDX-4180-R head unit, 4*40W.

What I'm wondering is how much current will be drawn and what transformer would be required.

Please help me out people

:-)
tcss 
Silver - Posts: 1,623
Silver spacespace
Joined: June 07, 2004
Location: United States
Posted: May 08, 2006 at 11:59 AM / IP Logged  
What you need is an invertor. Depending on how loud you want to play it I would guess you will need 15 to 30 amps continuous power. A company called Ashton makes some pretty clean invertors. Expect to pay around $200. Sorry about the car.
There is no such thing as free installation!
the12volt 
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Administrator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 07, 2002
Location: Louisiana, United States
Posted: May 08, 2006 at 12:14 PM / IP Logged  
tcss, I think you mean Astron. I use an Astron RS-70A  to run the system in my garage. You can find Astron power supplies here: http://www.astroncorp.com/linear.shtml
car sound system in the home -- posted image. the12volt • Support the12volt.com
tcss 
Silver - Posts: 1,623
Silver spacespace
Joined: June 07, 2004
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Posted: May 08, 2006 at 12:20 PM / IP Logged  
Volt, you are correct  Astron. Monday morning, lots of cobwebs, spent the weekend at Laguna Seca, beer.
There is no such thing as free installation!
jayson358 
Copper - Posts: 73
Copper spacespace
Joined: April 19, 2006
Location: United States
Posted: May 08, 2006 at 1:05 PM / IP Logged  
or u could buy a 12v lawn mower battery from a part store and a 5 amp inverter from a radioshack and use the inverter to keep the battery charged and the battery to supply the amps
93 diamante
pioneer deh-p3800mp
crossfire 40 band eq
alphasonik pma4075 mid amp
clif designs cd10.1Lx sub amp
powerbass xtreme 6 1/2 comp
"   " 6x9 rear
alpine 2 12" type r
ported 40hz tune
kirktcashalini 
Silver - Posts: 492
Silver spacespace
Joined: November 13, 2005
Location: United States
Posted: May 08, 2006 at 1:34 PM / IP Logged  
wont work... fore more than 30 minutes?
99 Blazer LT.   Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)
haemphyst 
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Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: May 08, 2006 at 4:37 PM / IP Logged  
Actually, you need a power supply. An invertor convers from DC to AC, you need to go the other way around. Tripp-Lite makes some very good ones. I use a 40A version on my bench for testing and servicing all kinds of electronics gear. They are not cheap, at all, (the 40A cost me, I think, 175.00) but they are VERY clean DC, and really do provide the current they specify. You CAN, if desired, add a small battery, like a MC battery, in parallel with the power supply for a better filtering, and peak current capacity, power system.
A 40A model should provide you with plenty of power for the items you have. Based on your max power specs above, I come up with 670 watts, and 670 watts divided by 14.4 volts, equals 46A. A little higher than you PS will supply continuously, but: 1, you wont be using it all, all the time, and 2, 46A is based on MAX numbers... 50 to 75% of that for real-world continuous numbers... Even allowing for efficiency, 40A oughta do what you need.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
saturnsubohio 
Copper - Posts: 114
Copper spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: May 21, 2004
Location: United States
Posted: May 08, 2006 at 5:55 PM / IP Logged  
CLICKY
you can also do what i've suggested in this thread but Haemphyst would work much much much better.
and its safe.
EDIT: whoo hoo 50 posts so I can edit the hyperlink
2006 WRX STI
Electrical Engineer
Ohio University Alumni
hairy_mcclary 
Member - Posts: 6
Member spacespace
Joined: May 02, 2006
Location: United Kingdom
Posted: May 09, 2006 at 5:51 AM / IP Logged  

Thanks for you advice, i just need to find one which converts 240vac to 12vdc.

car sound system in the home -- posted image.

:-)
hairy_mcclary 
Member - Posts: 6
Member spacespace
Joined: May 02, 2006
Location: United Kingdom
Posted: May 09, 2006 at 5:58 AM / IP Logged  
I have found a transformer which is at the right voltage but is only 10A continuous, i need at least a 25A which the head unit speakers removed. dont i?
:-)
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