Can this power connection work?

by palmharbor
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I just got an SRS signal processor to put between my mp3 player
and my direct input car stereo. This processor is small but was designed for a home stereo. It has an ac adapter. I have an SRS audio processor I want to use in the car.....its small but it was originally designed
for inside use......however it has a power adapter. It says input 115 VAC,
output 14 VAC 200ma.......Could I omit the power adapter and connect it directly to the car
battery SAFELY?




Replies (11)
palmharbor on 01/6/2006 18:13:42
2000 camaro, have adapter so i can plug in unit in question directly in back of Monson Stereo system, L & R RCA jacks

Ash on 01/7/2006 08:01:57
Your question is kinda confusing. Are you saying you have two SRS modules that have AC adapters? One you already have in the vehicle and the other you want to install as well? Is so how are you running power to the first one?

Here's the thing: the AC adapter is already a convertor for AC to DC. But it is made for the house. The safest thing to do is use a power inverter made for autos. That will cost a little bit. Why do you want to run those products? From what I understand, the Monsoon system is a good sounding one and shouldn't need extra even though SRS does add some nifty effects.


palmharbor on 01/7/2006 08:39:18
I have just one unit. I want to use it in the car. I want to connect the
srs unit directly to the battery , a power invertor is expensive
and it will crowd the cabin too much. I was told by two people that I can just connect it directly and it will work fine. I just want another opinion.
thanks

ttocs on 01/7/2006 09:43:35
there are two different types of electricity and they do not like to play together well. Anything made for home use requres 120Volts of alternating current(AC). Anything made to plug into a car runs on 12volts of direct current(DC). You will be unable to plug anything into your car that runs on AC(home stuff) with out a power inverter. They do make small ones for small stuff and they are not hard to hide.

Ash on 01/7/2006 09:45:31
The only way you can connect it diretly is you would have to make a fused DC plugin to power it. The porblem I have with doing so is the output voltage from the unit might not match up with the amp in your car. The ouput voltage from your HU could be too much for the SRS as well. Do you have a link to this peice that your trying to hook up so the specs can be looked up?

palmharbor on 01/7/2006 10:04:19
Yes, the power adapter outputs, 14 VAC 200ma. the power adapter is
like many many you have seen before...little black cube....
I can connect the unit with an extra male mini power plug and attached cable with the other end to connect to the battery

Ash on 01/7/2006 13:44:29
What you are talking about is a AC to DC convertor. What you need to find out is what is the DC output. I still don't recommend this. There are car audio aftermarket products that have SRS that can be added. It would be better to go that route.


Ash on 01/7/2006 14:03:29
Here is a link to HU's that have that feature. Perhaps this could be a more simpler and safer alternative.

http://216.109.125.130/search/cache?ei=UTF-8&p=SRS+car+audio&u=www.prnewswire.com/cgi-bin/stories.pl%3FACCT%3D104%26STORY%3D/www/story/08-31-2005/0004097094%26EDATE%3D&w=srs+car+audio&d=OfrXjQ0DMBNq&icp=1&.intl=us

palmharbor on 01/7/2006 14:11:16
Thanks for the information but I believe the SRS is not going to be offered in an outboard unit to interface with existing stereo systems for the car.
I tried it and it did not work...I got a crackeling sound but that was it.
I am using it with the outboard powered speakers I have with the TV in the bedroom. I could go back with a small power invertor and do it in the car but that is another $20 for the smallest one.

Ash on 01/7/2006 14:30:16
Well $20 is not bad, but do you know the modules rca output voltage? That aspect might not be compatible for car audio.

There are aftermarket products that will work, though they may be hard to find. I have seen them in the past, but never used them. You should do a web search for car audio SRS and see what you come up with. Or you could check that link that was given as well. I would do the work for you , but I'm pressed for time as I have to prepare for my stepson's birthday party today. Sorry and good luck.

swez on 01/7/2006 21:56:35
Ash/ttocs pointed out a few key points:

1. This "wall wart" is 14 volts AC and 0.2 amperes of current draw

2. Most electronic and digital circuits require DC power that is converted in the power supply from 120 VAC to a nominal DC voltage (NOT AC)

3. The MP3 output may be very strong for a home stereo input device. It depends on the input circuit impedance and your MP3 player output voltage, to that impedance

4. Also, the SRS output voltage for most home products is often under 1 volt AC signal. The HU inputs would need a bit more voltage in some cases, to work properly

Do you have the make & model # of this SRS device so we can review the specs? If not, we cannot help more than what you have seen so far.

Swez





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