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how do i hook up subs in my room?


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bumflik 
Copper - Posts: 58
Copper spacespace
Joined: January 03, 2008
Location: Florida, United States
Posted: September 03, 2008 at 5:49 PM / IP Logged  
I want to hook up my 500 watts RMS sub to my room for a little bit of time (4-5 weeks). I want it to be very simple and inexpensive becuase it isnt going to be a permanent set-up.
I was thinking about this: Hook up the subs to amp and then hook up the amp to a car battery (just like in a car). Of course I know that I have to run a small wire from the + of the battery to the remote on input on the amp. I also know that to ground the amp I have to hook it up to the - of the battery. Then, to charge the battery..I will have to hook up a car battery charger to it every time the battery gets low. Another thought I had was that I could just hook up the battery charger to battery while the amp was on as well. (Also just like usual I will put a fuse on the positive connection!)
What do you guys think? Isnt this easier and cheaper than the whole buying a AC-DC converter.
reax222 
Copper - Posts: 220
Copper spacespace
Joined: March 11, 2006
Location: United States
Posted: September 03, 2008 at 6:22 PM / IP Logged  
If you have the battery and charger than yes it's cheaper and easier than buying a converter. However you already have a battery charger which is the same as AC-DC converter, it probably can't produce the 41amps you need to drive the subs though.
I would keep the charger on while playing. Car batteries are meant to start a car and clean up the voltage from the alternator. A starting battery would not like being used for this, a deep cycle would be better suited.
bumflik 
Copper - Posts: 58
Copper spacespace
Joined: January 03, 2008
Location: Florida, United States
Posted: September 03, 2008 at 6:36 PM / IP Logged  
reax222 wrote:
If you have the battery and charger than yes it's cheaper and easier than buying a converter. However you already have a battery charger which is the same as AC-DC converter, it probably can't produce the 41amps you need to drive the subs though.
I would keep the charger on while playing. Car batteries are meant to start a car and clean up the voltage from the alternator. A starting battery would not like being used for this, a deep cycle would be better suited.
omfg awsome! I have a deep cycle battery in my boat, its wth heavy though =( Yeah thanx alot ill try this set up! As for the amps, its ok I dont think it would be a good idea to play the sub max volume in my house. My neighboors would get wized off.
audiocableguy 
Copper - Posts: 630
Copper spacespace
Joined: January 27, 2003
Location: Idaho, United States
Posted: September 03, 2008 at 7:43 PM / IP Logged  
The battery charger could add enough noise to be annoying. Most battery chargers aren't designed to be power supplies and are not intended for continuous use. A converter would be filtered and much better regulated.
the fat kid 
Member - Posts: 35
Member spacespace
Joined: February 05, 2008
Posted: September 03, 2008 at 8:19 PM / IP Logged  
computer power supply works. fyi
reax222 
Copper - Posts: 220
Copper spacespace
Joined: March 11, 2006
Location: United States
Posted: September 04, 2008 at 7:44 AM / IP Logged  
I tried a 170watt PSU to drive a dirt cheap 100watt amp. I believe the problem I ran into was, there needs to be a load on the 5v rail as well as the 12v rail. Otherwise, it just shut down on me as the amp tried to produce sound.
reax222 
Copper - Posts: 220
Copper spacespace
Joined: March 11, 2006
Location: United States
Posted: September 04, 2008 at 7:47 AM / IP Logged  
For the battery charger making noise, I run my stereo in my yard with a charger hooked up. Granted, I do have more wire for the current to flow, but I haven't noticed any noise. I would think that the battery would filter out most of it, what was left I wouldn't expect to come through subs.

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