First of all... I am new to this. If I say something silly, just let me know. I am doing this to learn and I am not afraid to fail. So here we go...
I am building a dual mono-block amplifier with a pre-amp. All in one case, but planning to divide every board with 2mm of aluminum to reduce any potential noise. (if this is not necessary, please explain).
These are my parts:
2x IRS2092 class D amps - max. 200W / max. 50V / max. 8A
1x AD827JN pre-amp - max. 15V / max. 2A
1x powersupply DC - max. 600W / max. 60V / max. 10A
My question is: I would need an extra regulator for the pre-amp, right? Because I cannot connect the amp AND pre-amp because the pre-amp can not handle the power that would be coming in.
Any other comments are welcome. Positive and negative ones.
Cheers.
EDIT: If people want to know what parts I am using just type the modelcode in AliExpress.
I am building a dual mono-block amplifier with a pre-amp. All in one case, but planning to divide every board with 2mm of aluminum to reduce any potential noise. (if this is not necessary, please explain).
These are my parts:
2x IRS2092 class D amps - max. 200W / max. 50V / max. 8A
1x AD827JN pre-amp - max. 15V / max. 2A
1x powersupply DC - max. 600W / max. 60V / max. 10A
My question is: I would need an extra regulator for the pre-amp, right? Because I cannot connect the amp AND pre-amp because the pre-amp can not handle the power that would be coming in.
Any other comments are welcome. Positive and negative ones.
Cheers.
EDIT: If people want to know what parts I am using just type the modelcode in AliExpress.
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The pre amp needs to have good supplies or you will get noise in it.
+ and - 12 volt regulators should be good.
The irs2092 is well used.
+ and - 12 volt regulators should be good.
The irs2092 is well used.
Your post is lacking details. There is not enough information for a reasonable response.
Yes, you'll need a separate regulator for the preamp section. Whatever voltage you choose to operate the main power supply at, it'll have to regulate from that to the 15V needed - and pass the current the preamp part takes.
I find 2A hard to believe for a preamp, but that's what you provided. So to get from 50V to 15, the regulator will have to drop 35V. Doing that at 2A means it would have to dissipate 70W, which is ridiculous - perhaps something's wrong with the preamp current requirement. Or, you'll need to purchase a separate power supply for just the preamp part, due to its large difference in voltage requirement spec from the power amps.
Unsure what the preamp gets you, to go through the hassle of accommodating it. Most digital sources these days have volume control and EQ built in - perhaps you could get away with just a volume control potentiometer in front of the two amplifiers; for speaker / eardrum safety and convenience in operation. (I hate having to log in to Windows, just to adjust the volume a little...)
FWIW, "Monoblock" generally means a monaural amplifier with its own power supply. Since you're powering two amplifiers from the same power supply, it's not a monoblock, or dual monoblocks. It's simply a stereo amplifier. To be dual monoblock, you'd have to use a separate power supply for each amp, within your enclosure.
Separate power supplies for everything is generally a good way to go for DIY. Because you can afford it and it solves some problems.
I find 2A hard to believe for a preamp, but that's what you provided. So to get from 50V to 15, the regulator will have to drop 35V. Doing that at 2A means it would have to dissipate 70W, which is ridiculous - perhaps something's wrong with the preamp current requirement. Or, you'll need to purchase a separate power supply for just the preamp part, due to its large difference in voltage requirement spec from the power amps.
Unsure what the preamp gets you, to go through the hassle of accommodating it. Most digital sources these days have volume control and EQ built in - perhaps you could get away with just a volume control potentiometer in front of the two amplifiers; for speaker / eardrum safety and convenience in operation. (I hate having to log in to Windows, just to adjust the volume a little...)
FWIW, "Monoblock" generally means a monaural amplifier with its own power supply. Since you're powering two amplifiers from the same power supply, it's not a monoblock, or dual monoblocks. It's simply a stereo amplifier. To be dual monoblock, you'd have to use a separate power supply for each amp, within your enclosure.
Separate power supplies for everything is generally a good way to go for DIY. Because you can afford it and it solves some problems.
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@Mello4: What details would you need to answer my "power" question next to volts and amps?
@jjasniew: Thank you for your detailed response. It confirms what I already suspected.
The pre-amp according to the manufacturer: Recommended 15W dual AC15V small ring cattle transformer. (12V-18V)
So it should work on 1A.
"Unsure what the preamp gets you, to go through the hassle..." - it's an experiment I like to make. What DOES it add? I don't know, let's find out 🙂.
@jjasniew: Thank you for your detailed response. It confirms what I already suspected.
The pre-amp according to the manufacturer: Recommended 15W dual AC15V small ring cattle transformer. (12V-18V)
So it should work on 1A.
"Unsure what the preamp gets you, to go through the hassle..." - it's an experiment I like to make. What DOES it add? I don't know, let's find out 🙂.