A little help with a 2.1 tda7379 + Ne5532 Ebay amp.
Hi guys,
Ive got a bit of a problem and i hope i can get some help/insight here.
I am a complete noob at electronics. I can solder, build from parts/instructions, but i can't make head or tail out of a schematic.
Heres the thing, i needed a small 2.1 amp for a project that i have going and instead of coming up with one from scratch, which i havent a clue how to do, i came across several on Ebay. I only wanted DC power amps as i did not want to mess with AC transformers.
Most on Ebay are rated for higer wattage.. i only need 35 watts at most. So these seemed perfect.. Finished Board SUBWOOFER2 1 TDA7379 3 Channel Power Amplifier NE5532 Pre Amp DIY | eBay
The problem is that the crossover frequency is fixed.. and i need to change it to a higher cross over point.
Im pretty sure its just a cou0ple of components that determine the crossover frequency.. but how do i tell which ones and what to change them to?
If theres an alternate amp that fits my need, i would appreciate the suggestions, or is it even possible to just swap out some components to change the crossover point?
All help is very much appreciate.
Regrads,
asmd.
Hi guys,
Ive got a bit of a problem and i hope i can get some help/insight here.
I am a complete noob at electronics. I can solder, build from parts/instructions, but i can't make head or tail out of a schematic.
Heres the thing, i needed a small 2.1 amp for a project that i have going and instead of coming up with one from scratch, which i havent a clue how to do, i came across several on Ebay. I only wanted DC power amps as i did not want to mess with AC transformers.
Most on Ebay are rated for higer wattage.. i only need 35 watts at most. So these seemed perfect.. Finished Board SUBWOOFER2 1 TDA7379 3 Channel Power Amplifier NE5532 Pre Amp DIY | eBay
The problem is that the crossover frequency is fixed.. and i need to change it to a higher cross over point.
Im pretty sure its just a cou0ple of components that determine the crossover frequency.. but how do i tell which ones and what to change them to?
If theres an alternate amp that fits my need, i would appreciate the suggestions, or is it even possible to just swap out some components to change the crossover point?
All help is very much appreciate.
Regrads,
asmd.
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the sub is crossed too low, and i would like the sub to be crossed higher to fill in the bottom end of the L/R channel giving it a warmer tone.
If you posted a schematic then we could tell you which components to change to get a different crossover frequency ......
And you pretty much have to deal with AC power transformers with any amp . While most all amps run off of DC most get their DC from an AC transformer . The only way to avoid using a transformer is to use SMPS (which usually have transformers in them) or use a DC wall adapter (which has a transformer built into it) ...
And you pretty much have to deal with AC power transformers with any amp . While most all amps run off of DC most get their DC from an AC transformer . The only way to avoid using a transformer is to use SMPS (which usually have transformers in them) or use a DC wall adapter (which has a transformer built into it) ...
unfortunately i don't have the schematic.
This is a prebuilt amp i bought off ebay.
I am using a laptop power supply to run it.
Is there a schematic for an amp that i could build?
If theres a parts list, i can put it together.
regards.
This is a prebuilt amp i bought off ebay.
I am using a laptop power supply to run it.
Is there a schematic for an amp that i could build?
If theres a parts list, i can put it together.
regards.
Without a schematic we can only guess. My guess is that C7 and C9 determine the lowpass filter frequency for the sub. Identify the values and reduce them by how much you want to raise the crossover freq.
Post pcb top and bottom pics.
Hi friend, I could draw the schematics to your amp if you could post the pcb pics of top and bottom sides clearly.
Hi friend, I could draw the schematics to your amp if you could post the pcb pics of top and bottom sides clearly.
Thanks for the replies.
I just noticed theres distortion coming from the left channel at any volume. I think i either messed up assembly or theres a component defective. (cheked all solder joints and everything seems as it shoudl be so im leaning towards defective component.)
I have no tools except a basic multimeter to diagnose this, so its headed for the trash unfortunately...
Will have to get some other unit.
Again, thank you for all your replies. Its much appreciated.
Great to be part of this awesome forum.
God bless.
Regards,
asmd.
I just noticed theres distortion coming from the left channel at any volume. I think i either messed up assembly or theres a component defective. (cheked all solder joints and everything seems as it shoudl be so im leaning towards defective component.)
I have no tools except a basic multimeter to diagnose this, so its headed for the trash unfortunately...
Will have to get some other unit.
Again, thank you for all your replies. Its much appreciated.
Great to be part of this awesome forum.
God bless.
Regards,
asmd.
Hello asmd can you please post the bottom photo of the pcb mentioned above. I need it for my project. please.
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