I am looking for an amp schematic with two mid to high range outputs and a bass output. Ideal would let me use about plus and minus 18 volts as rail voltage. Low wattage is fine. Usage is computer sound system. Any suggestions?
In the datasheet on the TDA series ,like TDA 2040 ,TDA 2050 ,TDA 2052 there are some
schematics of passive and also active filters ; but those are for 'normal' boxes , to substitute the ordinary passive crossover . search for a subwoofer filter schematic , which includes also the highpass filters for the satellites .
schematics of passive and also active filters ; but those are for 'normal' boxes , to substitute the ordinary passive crossover . search for a subwoofer filter schematic , which includes also the highpass filters for the satellites .
Uhhhmm , well ; that's the TDA 2052 , which has 7 pins ( heptawatt )
You can also use the TDA 2050 which comes in pentawatt case ( 5 legs)
as it doesn't include the mute function . Those will be good for the satellites .
I don't think the schematic shown will perform very well ; the filter would need to be active , using some operational amplifiers to do a steeper filtering and for buffering before . Also one Opa to mix the two channels .
something like this one ; the subwoofer amplifier usually is more powerful than the other two , since most of the power goes to be loose thermically.
Subwoofer Filter Circuit
But you can try the application posted ! it's just a bunch of elements .
The woofer could be inside the box ,as usually seen in PC multimedia ,in a double reflex or bandpass .😱🙄😕
You can also use the TDA 2050 which comes in pentawatt case ( 5 legs)
as it doesn't include the mute function . Those will be good for the satellites .
I don't think the schematic shown will perform very well ; the filter would need to be active , using some operational amplifiers to do a steeper filtering and for buffering before . Also one Opa to mix the two channels .
something like this one ; the subwoofer amplifier usually is more powerful than the other two , since most of the power goes to be loose thermically.
Subwoofer Filter Circuit
But you can try the application posted ! it's just a bunch of elements .
The woofer could be inside the box ,as usually seen in PC multimedia ,in a double reflex or bandpass .😱🙄😕
What would be a good choice as to the type of capacitors to use in this circuit? I am not looking for super high end quality, it is only a computer speaker. But I want to make a good choice none the less.
I still need to make a choice as to what output amps to use I prefer a discrete circuit instead of all in one chips. There are pros and cons with each.😉
I still need to make a choice as to what output amps to use I prefer a discrete circuit instead of all in one chips. There are pros and cons with each.😉
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Hi ,
since you've got two equal sets , I wouldn't bother to do a 2.1 system .
Having two 12 V tranformers it's ok to make a dual supply , and easy to make
two stereo amplifiers 20W power with chip amps . Then , discretes may be used in the passive crossover for the speakers 🙂
since you've got two equal sets , I wouldn't bother to do a 2.1 system .
Having two 12 V tranformers it's ok to make a dual supply , and easy to make
two stereo amplifiers 20W power with chip amps . Then , discretes may be used in the passive crossover for the speakers 🙂
Lepai 2.1 2x40W Amplifier + 1x68W Sub Output 310-308
Hi,
Might be an idea, even if it doesn't suit you
might suit someone finding this thread.
rgds, sreten.
Hi,
Might be an idea, even if it doesn't suit you
might suit someone finding this thread.
rgds, sreten.
Ref post #3. That to me, looks like a poorly implemented 2nd order PLLXO in front of the chip amps.
dave
I am committed to using op amps, I have a ton of them, so that is why I asked about the caps. I do not need that much power for the left and right. The two woofers in the base units will drive my wife crazy as it is. But I like bass hehehehe... I will bread board it before I make the pcb. So I am looking for a couple of simplistic low watt amps and one just a little bigger for my plus and minus 18v.
Krisfr,
If you want to use op amps you have, this may not be useful, but it may give you or anyone else looking to build a 2.1 system some ideas. I'm trying to find a small, decent sounding solution myself.
http://www.diyaudio.com/forums/class-d/205564-maxim-2-1-class-d.html
Speaker Amplifier and Modulator - Mid/High-Power Amplifier - TAS5630B - TI.com
Speaker Amplifier and Modulator - Mid/High-Power Amplifier - TAS5731 - TI.com
The latter has built-in DSP. Haven't found any further info apart from a few posts here:
TI E2E Community
Dave, please post thoughts on the Lepai 2.1 when you can. Reviews indicating the crossover is ineffective curbed my enthusiasm for it.
Cheers!
If you want to use op amps you have, this may not be useful, but it may give you or anyone else looking to build a 2.1 system some ideas. I'm trying to find a small, decent sounding solution myself.
http://www.diyaudio.com/forums/class-d/205564-maxim-2-1-class-d.html
Speaker Amplifier and Modulator - Mid/High-Power Amplifier - TAS5630B - TI.com
Speaker Amplifier and Modulator - Mid/High-Power Amplifier - TAS5731 - TI.com
The latter has built-in DSP. Haven't found any further info apart from a few posts here:
TI E2E Community
Dave, please post thoughts on the Lepai 2.1 when you can. Reviews indicating the crossover is ineffective curbed my enthusiasm for it.
Cheers!
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