AS I HAVE HEARD THAT MOSFET HAS A TENDENCY OF GOING IN OSC IF LARGE NUMBER R PARALLELED ..... BUT ALSO THAT MOSFET R MORE FORGIVING THAN BJTS........AND ALSO THAT MOSFET AMP IS ALWAYS LESS EFFICIENT THAN A BJT AMP OF SAME SPEC....
I AM CONFUSED WHAT OUTPUT DEVICES SHOULD I USE FOR 1200W AMP @ 4E ,,, AND WHAT OUTPUT TOPOLOGY QUASI OR COMPLEMENTARY.........
HELP ME GUYS...........
REGARDS
PHOENIX
I AM CONFUSED WHAT OUTPUT DEVICES SHOULD I USE FOR 1200W AMP @ 4E ,,, AND WHAT OUTPUT TOPOLOGY QUASI OR COMPLEMENTARY.........
HELP ME GUYS...........
REGARDS
PHOENIX
Sheesh turn caps lock off!!
What is the application ? for home use you rarely need a bigger amp that 50 watts per channel and maybe 150W for a normal size sub.
For an amp above 400W its better to buy a PA amp from Behringer or other budget company than to build one.
Amplifiers above about 500W contain lethal voltages and should not be built by a novice.
I'd say start off with simple stereo amp built from a pair of LM3886, there are kits available for cheap.
If 1kW is a requirement, buy a PA poweramp.
What is the application ? for home use you rarely need a bigger amp that 50 watts per channel and maybe 150W for a normal size sub.
For an amp above 400W its better to buy a PA amp from Behringer or other budget company than to build one.
Amplifiers above about 500W contain lethal voltages and should not be built by a novice.
I'd say start off with simple stereo amp built from a pair of LM3886, there are kits available for cheap.
If 1kW is a requirement, buy a PA poweramp.
To OP:
It sounds like you want to build your own 1200W@4R amp, but lack the proper EE skills.
Tekko's advice is right on. You'll need an amp riding on +/-110V rails at least. Such a project is not for a novice.
If you must proceed with your intent, both MOSFETs and BJTs can be used. The SuperLeach is a good starting point, you'll have to up-rate the design to suit your rails. MOSFETs will also work, provided you take proper precautions with the gate drive.
You might also want to consider a 600W@4R amp designed to operate continuously into a 2R load. Take 2 of them and bridge it to get 1200W@4R. That'll make your rail voltages easier to cope with. Don't expect very hi-fi performance out of that.
Disclaimer: Do not do this at home
It sounds like you want to build your own 1200W@4R amp, but lack the proper EE skills.
Tekko's advice is right on. You'll need an amp riding on +/-110V rails at least. Such a project is not for a novice.
If you must proceed with your intent, both MOSFETs and BJTs can be used. The SuperLeach is a good starting point, you'll have to up-rate the design to suit your rails. MOSFETs will also work, provided you take proper precautions with the gate drive.
You might also want to consider a 600W@4R amp designed to operate continuously into a 2R load. Take 2 of them and bridge it to get 1200W@4R. That'll make your rail voltages easier to cope with. Don't expect very hi-fi performance out of that.
Disclaimer: Do not do this at home
frnds i have a lot of EE experience ..... i have made amps >500W rms . I just needed to know which is better Mosfet or BJT in terms of high power amps.Sheesh turn caps lock off!!
What is the application ? for home use you rarely need a bigger amp that 50 watts per channel and maybe 150W for a normal size sub.
For an amp above 400W its better to buy a PA amp from Behringer or other budget company than to build one.
Amplifiers above about 500W contain lethal voltages and should not be built by a novice.
I'd say start off with simple stereo amp built from a pair of LM3886, there are kits available for cheap.
If 1kW is a requirement, buy a PA poweramp.
And just for the word.....I have made all the following amps with my own pcb design...
1. 6.1 channel amp using STK4211V & TDA2030
2. STUDIO SE by dr Bora
3. Legend stage mk2 by dr BORA
and many other small chip amp projects....
regards
phoenix
If 1kW is a requirement, buy a PA poweramp.
agreed.For that kind of power, forget linear audio, go with class D.
Cheaper to buy than to build.
Linear amp capable of 1200W into 4r0 requires ~210Vdc to 230Vdc across the supply rails!!!! What are you planning for capacitors?
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