Main > Audio/Jukebox/MP3 Forum
Using car speakers in a cab
Silverwind:
--- Quote from: planetjay on February 01, 2003, 01:25:02 pm ---A thin piece of sheet steel makes an excellent magnetic sheild.
1. Don't the the magnet touch it. If it does it becomes sort of a magnetic amplifier.
2. Don't let anything electronic touch it. It'll short out. (Duh)
3. It doesn't have to be big. Just between the magnet and picture tube. If the speaker in in it's own boxed space, just line the box with the sheet steel.
--- End quote ---
ok.. so line the inside of my marquee area with a thin layer of sheet metal? hehe must be tough to cut circles?
are there any other things that will sheild it also?
OSCAR:
--- Quote from: Silverwind on February 01, 2003, 02:47:06 pm ---ok.. so line the inside of my marquee area with a thin layer of sheet metal? hehe must be tough to cut circles?
are there any other things that will sheild it also?
--- End quote ---
See this thread, http://www.arcadecontrols.org/yabbse/index.php?board=1;action=display;threadid=3150.
There are links to pics of my speakers that I used bucking magnets on to sheild them.
Silverwind:
--- Quote from: Tehrasha on January 31, 2003, 09:59:50 pm ---
--- Quote from: ashardin on January 31, 2003, 06:07:40 pm ---Then again, you could get a used car and and 12v 10amp power supply for ~$100 on ebay as well, and not worry about the other stuff.
--- End quote ---
I used a two car audio amplifiers and a couple extra CPU powersupplies and a case I had lying about. 40w/channel is more than you want to stand directly in front of. :)
http://www.tehrasha.mamehost.com/mame/audio.html
--- End quote ---
regarding hooking up a car audio amplifier with ATX power supply...
would it be safe to hook up two power supplies to the power terminal on the amplifier? (IE 12 volt current, but maybe 15amps from each ATX psu?)
I have access to some spare power supplies laying around.. so this would be a real cheap fix..
for these.. i won't do much more than 50w rms per channel..
Tehrasha:
--- Quote from: Silverwind on February 04, 2003, 12:35:26 pm ---regarding hooking up a car audio amplifier with ATX power supply...
would it be safe to hook up two power supplies to the power terminal on the amplifier? (IE 12 volt current, but maybe 15amps from each ATX psu?)
I have access to some spare power supplies laying around.. so this would be a real cheap fix..
for these.. i won't do much more than 50w rms per channel..
--- End quote ---
I think I know what you mean. Hook two PSU in parallel to double the current to the amplifier.
I had considered doing that, but I was afraid that if the voltage regulators in teh two supplies were not matched they would begin fighting each other. So I never hooked them up to see what would happen.
The 300W supplies I used are rated at 12Amps at 12Volts. so thats 144Watts total.
I took a stab at 60% efficiency, so thats 86Watts of efefctive power.
And split that between two audio cannels, for about 43W/channe.
Thats where I got the VERY rough figure of 40W/channel maximum.
My volume control goes to 11, and while standing in front of it playing games, you dont want to go much above 6. ;D
Silverwind:
--- Quote from: Tehrasha on February 04, 2003, 03:07:24 pm ---
--- Quote from: Silverwind on February 04, 2003, 12:35:26 pm ---regarding hooking up a car audio amplifier with ATX power supply...
would it be safe to hook up two power supplies to the power terminal on the amplifier? (IE 12 volt current, but maybe 15amps from each ATX psu?)
I have access to some spare power supplies laying around.. so this would be a real cheap fix..
for these.. i won't do much more than 50w rms per channel..
--- End quote ---
I think I know what you mean. Hook two PSU in parallel to double the current to the amplifier.
I had considered doing that, but I was afraid that if the voltage regulators in teh two supplies were not matched they would begin fighting each other. So I never hooked them up to see what would happen.
The 300W supplies I used are rated at 12Amps at 12Volts. so thats 144Watts total.
I took a stab at 60% efficiency, so thats 86Watts of efefctive power.
And split that between two audio cannels, for about 43W/channe.
Thats where I got the VERY rough figure of 40W/channel maximum.
My volume control goes to 11, and while standing in front of it playing games, you dont want to go much above 6. ;D
--- End quote ---
yeah.. hehe.. i don't plan on playing it TOO loud.. since your head won't be too far from the speakers.. just want some decent RMS to ensure good full-range response..
What do you mean about the power supplies "fighting" eachother? The current should only be flowing into the amplifier..
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