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sims
December 6th 08, 08:56 PM
I know you can use a computers power supply to do this, but I currently have
all my extra computer parts in storage, but I happen to have a 12v adapter
similar to this one

http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=140847439 6674307&bmUID=1228596481399&PRODUCT%3C%3Eprd_id=845524441889747&assortment=primary&fromSearch=true

think there would be any issue sniping the end off and attaching that to my
car amp, and hooking up a single sub and a mp3 player through the rca in?

my only concern is there is no way to ground the amp like you can with a
power supply.

sims
December 6th 08, 11:32 PM
the info on my adapter is

input : 120 vac 60 hz 23w
output: 12 vdc 1000mA

this good enough to test a sub and amp?
sub: 1200w 400rms 2ohm
amp: 800 rms 2ohm



"sims" > wrote in message ...
> I know you can use a computers power supply to do this, but I currently
> have all my extra computer parts in storage, but I happen to have a 12v
> adapter similar to this one
>
> http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=140847439 6674307&bmUID=1228596481399&PRODUCT%3C%3Eprd_id=845524441889747&assortment=primary&fromSearch=true
>
> think there would be any issue sniping the end off and attaching that to
> my car amp, and hooking up a single sub and a mp3 player through the rca
> in?
>
> my only concern is there is no way to ground the amp like you can with a
> power supply.
>
>
>
>

sims
December 7th 08, 02:12 AM
nevermind, that idea is going to suck a lot even if it did work. not going
to be enough power period. just going to do it the red neck way and trickle
charge a car battery.



"sims" > wrote in message
...
> the info on my adapter is
>
> input : 120 vac 60 hz 23w
> output: 12 vdc 1000mA
>
> this good enough to test a sub and amp?
> sub: 1200w 400rms 2ohm
> amp: 800 rms 2ohm
>
>
>
> "sims" > wrote in message
> ...
>> I know you can use a computers power supply to do this, but I currently
>> have all my extra computer parts in storage, but I happen to have a 12v
>> adapter similar to this one
>>
>> http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=140847439 6674307&bmUID=1228596481399&PRODUCT%3C%3Eprd_id=845524441889747&assortment=primary&fromSearch=true
>>
>> think there would be any issue sniping the end off and attaching that to
>> my car amp, and hooking up a single sub and a mp3 player through the rca
>> in?
>>
>> my only concern is there is no way to ground the amp like you can with a
>> power supply.
>>
>>
>>
>>

ChrisB[_2_]
December 13th 08, 07:27 PM
sims wrote:
> nevermind, that idea is going to suck a lot even if it did work. not
> going to be enough power period. just going to do it the red neck way
> and trickle charge a car battery.
>
>
>
> "sims" > wrote in message
> ...
>> the info on my adapter is
>>
>> input : 120 vac 60 hz 23w
>> output: 12 vdc 1000mA
>>
>> this good enough to test a sub and amp?
>> sub: 1200w 400rms 2ohm
>> amp: 800 rms 2ohm
>>
>>
>>
>> "sims" > wrote in message
>> ...
>>> I know you can use a computers power supply to do this, but I
>>> currently have all my extra computer parts in storage, but I happen
>>> to have a 12v adapter similar to this one
>>>
>>> http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=140847439 6674307&bmUID=1228596481399&PRODUCT%3C%3Eprd_id=845524441889747&assortment=primary&fromSearch=true
>>>
>>>
>>> think there would be any issue sniping the end off and attaching that
>>> to my car amp, and hooking up a single sub and a mp3 player through
>>> the rca in?
>>>
>>> my only concern is there is no way to ground the amp like you can
>>> with a power supply.
>>>
>>>
>>>
>>>
I know I am late on this because I had to reload my main computer, but I
figured I would tell you how a known amp manufacturer set up his 12 volt
bank.

He uses THREE Pyramid 55 amp 12 volt power supplies and a bank of 3 deep
cycle batteries from Wal Mart to test his 3000 watt RMS amp. When I
asked him if he used huge diodes on the positive line from each power
supply to keep them from potentially back feeding into one another, he
told me NO.

Basically, each power supply is connected to a battery, the battery bank
is wired in parallel to give a strong 12 volt setup, and he is able to
support the huge current draw that his 3,000 watt amp can suck down @ 1 ohm.

In your case, you would probably still need 2 12volt power supplies and
2 batteries if you wanted to run your system @ max volume :(

MOSFET
December 20th 08, 02:56 AM
We get this or a similar question at least three-five times a years ever
since the inception of RAC.

You clearly have the right idea. The current draw from a car amp would
require a transformer costing hundreds of dollars. Using car batteries is
DEFINATELY the way to go and just keep a continuous trickle-charge on those
suckers. But three car batteries connected in parellel should give you all
the current you would need to drive multiple car amps and produce hundreds
of watts.

The funny thing is how many HUNDREDS of guys over the years thought they
could use car amps in the home and simply go to Goodwill, buy a 12 volt AC
to DC converter and power car amps in the home. Unfortunately, they often
only focus on the voltage output and not the max. amperage output which is
usually something like 100 milliamps. MAYBE enough to turn on a HU and get
a small trickle of sound out of it's speaker outputs. A quick refresher
course regarding Ohm's Law would have set these folks straight: 12 volts X
100 miliamps= 1.2 watts......Whew!!!! Cover your ears!!!!!

MOSFET


"ChrisB" > wrote in message
...
> sims wrote:
>> nevermind, that idea is going to suck a lot even if it did work. not
>> going to be enough power period. just going to do it the red neck way
>> and trickle charge a car battery.
>>
>>
>>
>> "sims" > wrote in message
>> ...
>>> the info on my adapter is
>>>
>>> input : 120 vac 60 hz 23w
>>> output: 12 vdc 1000mA
>>>
>>> this good enough to test a sub and amp?
>>> sub: 1200w 400rms 2ohm
>>> amp: 800 rms 2ohm
>>>
>>>
>>>
>>> "sims" > wrote in message
>>> ...
>>>> I know you can use a computers power supply to do this, but I currently
>>>> have all my extra computer parts in storage, but I happen to have a 12v
>>>> adapter similar to this one
>>>>
>>>> http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efolder_id=140847439 6674307&bmUID=1228596481399&PRODUCT%3C%3Eprd_id=845524441889747&assortment=primary&fromSearch=true
>>>>
>>>> think there would be any issue sniping the end off and attaching that
>>>> to my car amp, and hooking up a single sub and a mp3 player through the
>>>> rca in?
>>>>
>>>> my only concern is there is no way to ground the amp like you can with
>>>> a power supply.
>>>>
>>>>
>>>>
>>>>
> I know I am late on this because I had to reload my main computer, but I
> figured I would tell you how a known amp manufacturer set up his 12 volt
> bank.
>
> He uses THREE Pyramid 55 amp 12 volt power supplies and a bank of 3 deep
> cycle batteries from Wal Mart to test his 3000 watt RMS amp. When I asked
> him if he used huge diodes on the positive line from each power supply to
> keep them from potentially back feeding into one another, he told me NO.
>
> Basically, each power supply is connected to a battery, the battery bank
> is wired in parallel to give a strong 12 volt setup, and he is able to
> support the huge current draw that his 3,000 watt amp can suck down @ 1
> ohm.
>
> In your case, you would probably still need 2 12volt power supplies and 2
> batteries if you wanted to run your system @ max volume :(

aaRDee
January 24th 09, 04:38 PM
On Dec 7 2008, 1:56*am, "sims" > wrote:
> I know you can use a computers power supply to do this, but I currently have
> all my extra computer parts in storage, but I happen to have a 12v adapter
> similar to this one
>
> http://www.canadiantire.ca/browse/product_detail.jsp?FOLDER%3C%3Efold...
>
> think there would be any issue sniping the end off and attaching that to my
> car amp, and hooking up a single sub and a mp3 player through the rca in?
>
> my only concern is there is no way to ground the amp like you can with a
> power supply.

MOSFET is perfect!
Amperes is what really matters.
Imagine around 20-25 volts at 4ohm load ... you will find the answer