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Old 23rd June 2012, 05:49 AM   #1
diyAudio Member
Join Date: Apr 2011
Default will this work???

hi, any body can halp me understand if this circuit will work
and havean output of 150W with 12V?
if not can you please give me a link for a subwoofer amp with
12v or
+-12volt or somethink like.
regards to all...
150W Audio circuit diagram - Audio Circuit - CircuitsFinder-Free Electronic Circuit Diagram Design

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Old 23rd June 2012, 10:42 AM   #2
AndrewT is offline AndrewT  Scotland
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Location: Scottish Borders
Forget it.

Start afresh and learn how amplifiers work.
regards Andrew T.
Sent from my desktop computer using a keyboard
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Old 23rd June 2012, 07:16 PM   #3
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hi, thnx can you please give any circuit for a sub?
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Old 23rd June 2012, 07:36 PM   #4
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you can start with the simplest one like LM3875/LM3886 called gainclones. you can also look for amp kits from Aussie amplifiers, HDamps.com etc,etc. the list is way big to name. also you have to know what class of amp you are looking for like class A, class B, class A/B, Class D etc etc... Also know at least tha basic in electronics and always to be safe since you will be working with live voltages Are you ready for that?
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Old 24th June 2012, 07:35 AM   #5
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If this is a make-or-buy decision, then buy. For 150 W from 12 V you do not only need an amp, but also a boost power supply.

You can get new car amps in that power range even from renowned manufacturers for less than 50 €
If you've always done it like that, then it's probably wrong. (Henry Ford)
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Old 25th June 2012, 03:43 PM   #6
johnr66 is offline johnr66  United States
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A well designed 150 watt amplifier will require require good knowledge of circuit layout for stability. It would need around +/- 55 volt rails (110 volts!) to produce a clean sine wave into an 8 ohm load.

If you want to learn, start on simple IC amps and learn how amplifiers are constructed.

BTW, the amplifier schematic shown will probably do no better than 12 watts into 4 Ohm load or 8 into 8 Ohms (before clipping).
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