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Old 6th January 2006, 08:10 AM   #1
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Default power supply for sonic t amp

hey just got a sonic t amp
its amazing for the money
im going to run 3 of these for a home brew theater
im just wondering if i can use the 12 volts from a computer ps
to power the t amp?
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Old 6th January 2006, 01:54 PM   #2
DcibeL is offline DcibeL  Canada
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I don't see why not. To use a computer power supply without a computer, look up which pins have to be shorted on the ATX connector in order to turn the supply on. You should also put a load on the 5V line. I have heard of switching supplies not working or blowing up if there is no load on the 5V.
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Old 6th January 2006, 05:05 PM   #3
gexter is offline gexter  Canada
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a PC power supply would only be good for a t amp because the draw is so low. the PS can do anywhere from 8 to 10 amps at 12v
that would be nice regulated power supply for it and wall adapter would not be anywhere near as stable.

As far as the power supply blowing up I never heard of that. what I have heard is that it needs draw to provide full output to the 12V and that I have noticed with the supplies I have used ( they were AT supplies)

it is always safe than sorry so put a led or something on it.

the pinout the green (pin14) on a ATX to any black will provide turn on. I am pretty sure thats the one but it would not hurt to double check. I have not done it for awhile.
I would use a switch.

my worthless two cents

I would like more impressions of your t amp and any mods and how they turn out. Thats why I came out of lurk mode.

newbie gex
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Old 6th January 2006, 08:55 PM   #4
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thankyou for your input it was not worthless at all

im glad i can use the puter ps i have a few on hand
it beats paying 60 bucks for wall warts

as for the sonic t i was completely amazed
my dad was an audiophile
and he used to sell stereo too
im am no expert by any means but i have heard a few amps and recievers in my day.. my dad used to tell me on average listening levels your only using about 10 watts..the leftover was for peak demands i gues that depends on the sensativity of your speakers too

i set it up with a sony cdr using the headphone jack
and a pair of energy xl25
played some metallica and some jimmy buffet

the low end was not very strong but thats normal for the energys
but it was there and the sound stage was great
great depth

so i fired up the sub and was very happy with it

my only wish is that sonic would produce a 30-60 watt pc amp
for about 60 bucks i guess im just dreamin lol

im going to use these amps to run a 6x9 full range
6 of them and imm going to cross them over at about 125 hz
with my sound card im my computer

so that should take a load off them
and let my subs do the work
i wish myy sony es30 sounded this good lol
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Old 6th January 2006, 09:34 PM   #5
Illusus is offline Illusus  Canada
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If you want something prettier than a PC PSU, I have ~50 nice switching power supplies that I use with my t-amps and won't mind sending out a few for next to nothing...how about $5ea +shipping.

They put out 13.8V, 3.2A. They work very well with my T-amps...much better than a regulated wall wart supply I experimented with. The only caveat is that the output connectors on these PSUs are a larger diameter than the t-amp's input so they have to be changed or hardwired into the amp. Nice sleek black boxes with leds built in. Very similiar to lapotop PSUs. Same deal for any other interested parties. Drop me a PM.

Also, consider SLA batteries, they're not too expensive and as stable as it gets. Plus, having a bank of batteries is cool.
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Old 7th January 2006, 12:13 AM   #6
DcibeL is offline DcibeL  Canada
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I'm interested in a couple of the supplies you have for sale. You Got Mail
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Old 7th January 2006, 12:54 AM   #7
gexter is offline gexter  Canada
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tvjunkie

thanks for your review and perceptions. I am really interested in this little amp.
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Old 8th January 2006, 12:33 AM   #8
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Default supply

thanks but im gonna strip the t amps use some cpu heatsinks
set them in a black desktop atx case like the htpc case with some leds,and use the ps to pwer them up
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Old 8th January 2006, 01:58 AM   #9
Tweeker is offline Tweeker  United States
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Some PC PSUs will not work if there is not a load on the 5 volt rail, an 80 ohm 1 watt resistor will do the job. Whoops, missed post #2.
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Old 8th January 2006, 10:12 AM   #10
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Illusus, YGPM!
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