i build before PA AMP from 4 STK4050II that is 200WRMS x 4
with power supply 55~0~55VAC 1.5K VA...
now i need a circuit for protection to my amplifier....
with power supply 55~0~55VAC 1.5K VA...
now i need a circuit for protection to my amplifier....
Dj BASS AMP said:
Let's see. You start a thread asking if you can change transistors
in an unspecified amp. Some of us try to tell you that without
a schematic you should not try that. You insist that you want
to change transistors because you want more power. We tell
you you won't get more power from this, and you will
probably have to redesign the whole amp to raise supply
voltages etc.
Obviously you didn't like the answers you got, so you started
a new thread about the same thing. Some other people, who
probably didn't read your previous thread, try to be helpful
and it all repeats. Despite people trying to help you, getting
information out of you about your amp and what you want to
do is harder than to get Saddam to tell where he has hidden
his forbidden toys. After a while you realize that you will have
to raise the supply voltage and ask if you can do that. People
tell you not to do that, since you don't know if your amp is
designed to handle higher voltages and will probably have to
be redesigned.
What happens? You raise the supply voltages contrary to all
advise you get, and now you want to build a protection circuit
for you amp!!! I don't mean to be rude, but I think the best
protection for your amplifier is not a protection circuit, but to
move it out of reach of you.
Since I have encountered DJ's questions before I have been following this thread to see when someone's fuse would blow. 😉
This is like a Ricki Lake show!
/Marcus
This is like a Ricki Lake show!
/Marcus
e96mlo said:Since I have encountered DJ's questions before I have been following this thread to see when someone's fuse would blow. 😉
This is like a Ricki Lake show!
/Marcus
Well, I wouldn't say my fuses blew, but I think somebody else's
fuses must blow to start understanding things. I have been
teaching university students long enough to recognize when
patience will not do the job, even if it hurts. 🙂
quote
i build before PA AMP from 4 STK4050II that is 200WRMS x 4
with power supply 55~0~55VAC 1.5K VA...
This is but a start. Taking a complete amplifier module, bolting
it to a heatsink and then adding a power supply is just a
small distance on your way around the world.
As evidenced by your earlier power supply schematics you
obviously don't even know the difference between a 70 volt
power supply and a +/- 70 volt power supply.
Many amplifier front ends have transistors spec'd to run
with the power supply voltages they are designed to work
with. Taking front end transistors that are designed to run
on +/-35 volts and hooking them up to +/-70 volts instead
will cause lots of dead parts.
Your quest to have huge amounts of power is really quite
silly. Higher efficiency horn speakers can make more noise
with 25 watts than some speakers can with 10 times that
amount of power.
The grateful dead at altimont used only 20 mcintosh power
amps (total power 6000 watts) to light up speaker towers
4 stories high, and filled an outdoor area of more than
a mile square.
I build class A amplifiers. While this is certainly not a good idea
for DJ use, i can say with authority that many amplifiers of
all classes have an output bias that is highly dependent
on the power supply voltages. Doubling the power supply
voltages can quadruple or more the standing bias in the
output section. Heat. Lots of it. Thermal runaway too.
A huge power supply and lots of high power output transistors
does not a huge amplifier make.
If you want to impress someone, photoshop up a 3000 watt
super duper peak power sticker and attach it to the side
of your new amplifier.
quote
ani one = 1800W Peak 2Ohm 900W RMS 2 Ohm...
I don't believe this for one minute.
42 amperes rms into a speaker. Not a chance.
Only 1 amplifier in the world i can think of can supply
this amount of power at such a low impedance without
destroying itself. It is made by krell and costs $120000
Time for you to get real. Or go and find a bunch of true
morons and try to impress them. People like peranders
have built more amplifiers in a month than you will in
10 years.
ricky lake??? NO NO NO... Jerry Springer
i build before PA AMP from 4 STK4050II that is 200WRMS x 4
with power supply 55~0~55VAC 1.5K VA...
This is but a start. Taking a complete amplifier module, bolting
it to a heatsink and then adding a power supply is just a
small distance on your way around the world.
As evidenced by your earlier power supply schematics you
obviously don't even know the difference between a 70 volt
power supply and a +/- 70 volt power supply.
Many amplifier front ends have transistors spec'd to run
with the power supply voltages they are designed to work
with. Taking front end transistors that are designed to run
on +/-35 volts and hooking them up to +/-70 volts instead
will cause lots of dead parts.
Your quest to have huge amounts of power is really quite
silly. Higher efficiency horn speakers can make more noise
with 25 watts than some speakers can with 10 times that
amount of power.
The grateful dead at altimont used only 20 mcintosh power
amps (total power 6000 watts) to light up speaker towers
4 stories high, and filled an outdoor area of more than
a mile square.
I build class A amplifiers. While this is certainly not a good idea
for DJ use, i can say with authority that many amplifiers of
all classes have an output bias that is highly dependent
on the power supply voltages. Doubling the power supply
voltages can quadruple or more the standing bias in the
output section. Heat. Lots of it. Thermal runaway too.
A huge power supply and lots of high power output transistors
does not a huge amplifier make.
If you want to impress someone, photoshop up a 3000 watt
super duper peak power sticker and attach it to the side
of your new amplifier.
quote
ani one = 1800W Peak 2Ohm 900W RMS 2 Ohm...
I don't believe this for one minute.
42 amperes rms into a speaker. Not a chance.
Only 1 amplifier in the world i can think of can supply
this amount of power at such a low impedance without
destroying itself. It is made by krell and costs $120000
Time for you to get real. Or go and find a bunch of true
morons and try to impress them. People like peranders
have built more amplifiers in a month than you will in
10 years.
ricky lake??? NO NO NO... Jerry Springer
kevin gilmore said:
Yes, few is more than none
I am smart enough to realize that > 500 W takes time and skill to develop if you want some quality.
BTW: I have seen Ricky Lake and her show is really really bad but I have never seen a Jerry Springer Show, only heard of it. Is he even worse?
DJ,
This is interesting.
A testosterone-crazed young man's mindless quest to create the worlds largest SS ******* competition........
Somehow I get the feeling this has all been done before.....
Kevin is absolutely right. The Krell is the answer, but it's a little expensive. You might consider a company in Lincoln Nebraska who make wonderful rotary generating sets which attach to tractors and cause lots of black smoke to come off anything attached to the output. It's called a field welder, and that might light up speakers well, too. Give it a try!!
DJ, an amplifier is a modulated power supply. A big amp requires a hugely destructive power supply, two in fact, one positive, and one negative. The trick is to keep the beast under control, and you need some impressive electronic gymnastics to keep it stable. Ensuring stability into low impedance loads with high power amplifiers is perhaps one of the most difficult aspects of the design. I have been involved in 500W amp development recently, and the problem is far from trivial, and the sonics become exponentially more difficult to achieve the more powerful you go.
You might be interested to hear that most rock concerts do not rely on brute force. They are based around horn speakers, lots of them, with high order active crossovers, and high EFFICIENCY. Most of the drivers used in pro-audio have astronomical BIL factors and boast efficiencies not less than 100dB/watt/meter. The efficiency of pro-audio leaves hifi for dead, and with good reason. High power is very heavy, and Roadies HATE heavy gear because they spend their lives carrying it around the world.
My suggestion is this: Buy a copy of a good audio electronics text (Boylestad and Nashevsky is a good one) and read it cover to cover. Then read it again. It's really quite complicated. Your comprehension of this craft - a very sophisticated craft in fact - is rudimentary at best, and you need to get some basic concepts into your mind and build on them. You seem bright, OK, get on with it, and take responsibility for your own learning. Don't waste people's time here until you understand what cross conduction and Nyquist criteria actually mean.
Aside from the bleeding obvious, I bear you no ill will. Just do the leg work, and you will then advance. Your quest is extremely ambitious. You might also study switching amplifiers, too. When you are good and ready, they might just be sophisticated enough to fill your need.
Now, where was I???
Cheers,
Hugh
This is interesting.
A testosterone-crazed young man's mindless quest to create the worlds largest SS ******* competition........
Somehow I get the feeling this has all been done before.....
Kevin is absolutely right. The Krell is the answer, but it's a little expensive. You might consider a company in Lincoln Nebraska who make wonderful rotary generating sets which attach to tractors and cause lots of black smoke to come off anything attached to the output. It's called a field welder, and that might light up speakers well, too. Give it a try!!
DJ, an amplifier is a modulated power supply. A big amp requires a hugely destructive power supply, two in fact, one positive, and one negative. The trick is to keep the beast under control, and you need some impressive electronic gymnastics to keep it stable. Ensuring stability into low impedance loads with high power amplifiers is perhaps one of the most difficult aspects of the design. I have been involved in 500W amp development recently, and the problem is far from trivial, and the sonics become exponentially more difficult to achieve the more powerful you go.
You might be interested to hear that most rock concerts do not rely on brute force. They are based around horn speakers, lots of them, with high order active crossovers, and high EFFICIENCY. Most of the drivers used in pro-audio have astronomical BIL factors and boast efficiencies not less than 100dB/watt/meter. The efficiency of pro-audio leaves hifi for dead, and with good reason. High power is very heavy, and Roadies HATE heavy gear because they spend their lives carrying it around the world.
My suggestion is this: Buy a copy of a good audio electronics text (Boylestad and Nashevsky is a good one) and read it cover to cover. Then read it again. It's really quite complicated. Your comprehension of this craft - a very sophisticated craft in fact - is rudimentary at best, and you need to get some basic concepts into your mind and build on them. You seem bright, OK, get on with it, and take responsibility for your own learning. Don't waste people's time here until you understand what cross conduction and Nyquist criteria actually mean.
Aside from the bleeding obvious, I bear you no ill will. Just do the leg work, and you will then advance. Your quest is extremely ambitious. You might also study switching amplifiers, too. When you are good and ready, they might just be sophisticated enough to fill your need.
Now, where was I???
Cheers,
Hugh
quote
BTW: I have seen Ricky Lake and her show is really really bad but I have never seen a Jerry Springer Show, only heard of it. Is he even worse?
Much worse. Many a broken nose, and a few other broken
body parts. In addition after one particular show one person
pulled a gun on another person and did shoot them.
He is also on PPV this month
Jerry Springer Uncut: Wild & Outrageous
Date: 2/4/2003!
This special promises to include the steamiest, craziest and hottest Jerry Springer moments never be...
BTW: I have seen Ricky Lake and her show is really really bad but I have never seen a Jerry Springer Show, only heard of it. Is he even worse?
Much worse. Many a broken nose, and a few other broken
body parts. In addition after one particular show one person
pulled a gun on another person and did shoot them.
He is also on PPV this month
Jerry Springer Uncut: Wild & Outrageous
Date: 2/4/2003!
This special promises to include the steamiest, craziest and hottest Jerry Springer moments never be...
Kevin, excuse me, but what is PPV?
http://www.acronymfinder.com/af-query.asp?String=exact&Acronym=ppv&Find=Find
Patent Procesus Vaginalis
People Powered Vehicle
Plum Pox Virus
Pneumococcal Pneumonia Vaccine
😕
http://www.acronymfinder.com/af-query.asp?String=exact&Acronym=ppv&Find=Find
Patent Procesus Vaginalis
People Powered Vehicle
Plum Pox Virus
Pneumococcal Pneumonia Vaccine
😕
I know what you mean. High power amps with some quality isn't easy to design, especially if you don't know anything about the subject.AKSA said:
peranders said:
He probably means Pay-per-view.
Anyway, they often show Jerry Springer here in Sweden too.
I don't like his program, so I seldom watch it and don't know
if any channel is sending it now. Last time they showed him,
it was ZTV. Check the schedules for the commercial channels
once in a while. Otherwise, you have the California version,
Jay Leno, on channel 5. 🙂
e96mlo said:Since I have encountered DJ's questions before I have been following this thread to see when someone's fuse would blow. 😉
This is like a Ricki Lake show!
/Marcus
As quoted this is not the first time DJ asks a 100 questions in one thread and manages to have almost all of them unrelated to eachother and ignoring all replies and recommendations.
Christer said:
Too late to edit my previous post.
Looking at todays TV schedules I realized
I got things mixed up. I was thinking of David Letterman, not
Jerry Springer. The latter I know nothing about, although I
have heard the name a lot.
Actually, there are a lot of PA amps that can deliver enormous amounts of power at low impedances. LAB Gruppen is a nice example.
Used PA amps can be found for reasonable prices. Maybe that would do the trick, DJ?
/Marcus
Used PA amps can be found for reasonable prices. Maybe that would do the trick, DJ?
/Marcus
the 1800W is a DJ spek'
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
lets see, 2 x 12 inch speakers and a midrange horn in
a ported box with a pair of 2 to 3 inch ports.
1800 watts.... Cow droppings. 2 ohms, more Cow droppings.
Maybe that is the dc impedance which has little to do with anything.
The horn is maybe good for 50 watts, probably less.
And the woofers are maybe good for 100, almost certainly
less.
Bet the woofers have 1.5 or 1 inch voice coils and magnets
less than 16 ounces each.
Typical no name low quality junk. Which means you really
need that super duper 3000 watts ultra peak power low
quality amplifier to go with them.
Go get some altec's or jbl's
a ported box with a pair of 2 to 3 inch ports.
1800 watts.... Cow droppings. 2 ohms, more Cow droppings.
Maybe that is the dc impedance which has little to do with anything.
The horn is maybe good for 50 watts, probably less.
And the woofers are maybe good for 100, almost certainly
less.
Bet the woofers have 1.5 or 1 inch voice coils and magnets
less than 16 ounces each.
Typical no name low quality junk. Which means you really
need that super duper 3000 watts ultra peak power low
quality amplifier to go with them.
Go get some altec's or jbl's
high power amp
Hi Dj,
usually I am too busy and cannot be on line everyday but I was following your your thread since yesterday but today I see you came up with speakers.Would you please just tell us what is in your mind about your system.Because I can think of 3 things.You really love to design a high power amp,you try to save some mony or you need an amp to drive your speakrs.Do you have any information about your drivers that you have them in your speaker box?What do you mean of 1800w?
In my opinion,if I were you I would bi- amp my spekers actively with mono amps and keep the powers as much as possible close to speakers with short speaker cables and run longer XLR to the source.Have you ever heard about Bryston amps?They come with 20 years warranty too.(www.bryston.ca)
Good luck
Hamlet,
Hi Dj,
usually I am too busy and cannot be on line everyday but I was following your your thread since yesterday but today I see you came up with speakers.Would you please just tell us what is in your mind about your system.Because I can think of 3 things.You really love to design a high power amp,you try to save some mony or you need an amp to drive your speakrs.Do you have any information about your drivers that you have them in your speaker box?What do you mean of 1800w?
In my opinion,if I were you I would bi- amp my spekers actively with mono amps and keep the powers as much as possible close to speakers with short speaker cables and run longer XLR to the source.Have you ever heard about Bryston amps?They come with 20 years warranty too.(www.bryston.ca)
Good luck
Hamlet,
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