Anyone ever make their own amp?

[MatthewR6 10+ year member]

this is why i ask.

http://cgi.ebay.com/PPI-PRECISION-POWER-PC2150-bare-PC-board-NEW-Rev-05_W0QQitemZ3086884535QQcategoryZ18796QQtcZphotoQQcmdZViewItem

Click to read more...

 

[JimJ 5,000+ posts]

Sure, why not? If you have the schematic to go along with the PCB...

Most of my amp DIY work has been point-to-point wiring with discrete components, so that doesn't count //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[MatthewR6 10+ year member]

he has ppi pc 2350 boards too, i asked him if he had a list of everything needed. this is what he said.

"You can just look at one that's complete and copy it. The tough part

will be the transformer though.. We have some 500w transformers you can

triple or quadrouple.. but you gotta know what you're doing."

i could look at my 2350 to see what it would take(ALOT) , but whats the deal with the transformers?

 

[its_bacon12 10+ year member]

toroids?

 

[JimJ 5,000+ posts]

What about them?

 

[traksta15 10+ year member]

transformers are awesome!!i remember playing with them as a kid.

 

[MatthewR6 10+ year member]

transformers are awesome!!i remember playing with them as a kid.

if youre 18, your still a kid!//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif

 

[thch 10+ year member]

hmm. i'm always interested in car audio amplifier heatsinks. I build home audio amps, but not car audio, as i don't usually have a sufficient toroid and PSU design just layed out.

-------------

high speed switching transformers are a bit tricky. high speed swithcing power supplies are used in all high power amplifiers in a car. the very high speed gives you a very small core size.

but the core must be chosen to be a certian material and a certain size. too big and you have more hysteresis loss (core changes magnetic polarity -- this takes energy. core changes over 10,000 times per second = signifigant energy = lower efficiency). this also heats up the core. if for your 1000W amp, the core needs to dissipate 50W, well, it would make sense to get a core capable of 50W dissipation...

further it must be big enough not to saturate (magnetic feild builds up to a maximum allowed for material. at this point the transformer looks like a peice of wire instead of an energy-coupling device...)

the wires must be wound in a certain way to reduce interwinding capacitance and series inductance, and the correct number of primary and secondary turns must be used.

its not the hardest thing in the world, but of the components, its the one that you'll have to build and possibly even design.

and of course some materials are well suited to improving hysteresis, permeability, or saturation performance.

 

[flakko 5,000+ posts]

ey! do u think i can put other parts on this board? like USamps parts? hehe

 

[cjjackson85 5,000+ posts]

Haha. No.

 

[MatthewR6 10+ year member]

ey! do u think i can put other parts on this board? like USamps parts? hehe

hahah:

 

[RandyJ 10+ year member]

hahah:

Well, electronics components are electronic components correct? the only problem would be size and fitting would it not?

 

[Sythetic1 10+ year member]

An individual company's amps are specially tuned devices. Every discrete component from the caps, inductors, MOSFETs, etc. were selected to complement each other one way or another. This results in a very specific sound reproduction characteristic. Complex circuitry is often used in the "better" amps to achieve a better sound over a wider range of frequency and power levels. I have built audio amplifiers before from kits, but they dont really compare to the level of a typical car audio amplifier. Try purchasing some small audio amplifier kits at various different prices, you'll be able to test what better quality components and design do for the performance of an amplifier.

 

[flakko 5,000+ posts]

An individual company's amps are specially tuned devices. Every discrete component from the caps, inductors, MOSFETs, etc. were selected to complement each other one way or another. This results in a very specific sound reproduction characteristic. Complex circuitry is often used in the "better" amps to achieve a better sound over a wider range of frequency and power levels. I have built audio amplifiers before from kits, but they dont really compare to the level of a typical car audio amplifier. Try purchasing some small audio amplifier kits at various different prices, you'll be able to test what better quality components and design do for the performance of an amplifier.

so your saying putting USAmps parts in a PPI board will make it sound same, better, or worse... im getting mixed signals.

 

[JimJ 5,000+ posts]

?

Do you know the shoddy levels of production of most "car audio amplifiers"? Better components and design certainly do yield a better amp, but I wouldn't go as far to say that they're "specially tuned devices" - anyone with a soldering iron and the know how could reproduce one. No voodoo required...