Pardon my ignorance but I,m new to the DIY headphone scene but is it possible to build a 4 output headphone amp with a single input based on a simple Cmoy design?
I am thinking of powering it with a 12v regulated supply that would feed power to each cicuit (TLE2426 rail splitter) whicjh would also have individual power switches volumes controls, etc.
This is to be used in a home recording studio where I need to have individual volume control for each of the band members listening to the same mix.
Rather than buy the Behringer 4 channel amp I could build 4 Cmoy amps and power them off the one supply and feed the same input into each and house each circuit in one large unit.
Can anyone see any problems or have any suggestions that can make this project a reality.
Thanks Tom
I am thinking of powering it with a 12v regulated supply that would feed power to each cicuit (TLE2426 rail splitter) whicjh would also have individual power switches volumes controls, etc.
This is to be used in a home recording studio where I need to have individual volume control for each of the band members listening to the same mix.
Rather than buy the Behringer 4 channel amp I could build 4 Cmoy amps and power them off the one supply and feed the same input into each and house each circuit in one large unit.
Can anyone see any problems or have any suggestions that can make this project a reality.
Thanks Tom
well you would be putting all of the volume controls in parallel, which could be a problem, might need a buffer. i would stay away from the rail splitter when you have no need to do such a thing for an ac powered unit. use real ground and a real bipolar power supply
Totally agree with qusp.
Forget the TLE2426. Build a proper regulated power supply.
If you use four 10k pots, like the standard C-moy, you will probably need a buffer. Or, you could use four 100k pots and add noise and have to make changes to the resistor networks. The buffer is the better idea in this case.
Make sure your source has no DC offset so you can remove the input blocking caps. Make a special input plug so nothing else can be plugged into to the box. Don't use standard input plugs because someone might plug in whatever to it, and if it has DC on the line, it will cause problems. I would also add a warning label in case someone gets cheeky and manages to plug something else into it anyway.
Forget the TLE2426. Build a proper regulated power supply.
If you use four 10k pots, like the standard C-moy, you will probably need a buffer. Or, you could use four 100k pots and add noise and have to make changes to the resistor networks. The buffer is the better idea in this case.
Make sure your source has no DC offset so you can remove the input blocking caps. Make a special input plug so nothing else can be plugged into to the box. Don't use standard input plugs because someone might plug in whatever to it, and if it has DC on the line, it will cause problems. I would also add a warning label in case someone gets cheeky and manages to plug something else into it anyway.
You can certainly do this, but by the time you buy 4 pots, jack sockets, opamps, case, transformer, regulators, caps, perfboard etc., you might be as well to buy one ready-made. It depends what you can get locally, but I found one that looks like 4-channel for $13 US.
PYLE PHA40 Headphone amplifier
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PYLE PHA40 Headphone amplifier
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Friends don't let friends put Pyle crap in their studio. Yea, you could buy this. Who knows how it's made?
Friends don't let friends put Pyle crap in their studio. Yea, you could buy this. Who knows how it's made?
Why not make a recommendation of a reasonably priced unit yourself then instead of just injecting negativity? I could throw something together myself to do this in a couple of hours from parts I have on hand, but I know when not to DIY. $13 is cheap for a box, sockets and pots even if you have to replace the guts completely. I don't know why you're emphasising the fact that it's a recording studio, it won't impact one whit on the recorded sound.
Here's a circuit showing 3 sections with master volume, when I showed the fourth the detail was inadequate:
Keep the 100n's close to the 5532 power pins.
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well that above (as it is anyway), isnt going to be much use unless the people all use the same sensitivity headphones and like to listen at the same level, to the same channel strip. in reality that will never happen, so they'll need individual volume controls, thus why i said he would need a buffer with all those pots in parallel. theres probably other solutions too, but not on the same level as a cmoy.
apart from that it looks fine
apart from that it looks fine
aha, an unfamiliar pot symbol that looks like a switch and tiny text on a 24" i was looking in more local loops for one in the feedback and only saw the one at the input. that and i'm blind
fair call. not quite what the man had in mind when he popped his head in here though i'm sure hehe, that'll teach him to come here for help.....to spend his money.
making 4 separate cmoys and a basic buffered splitter might be a better idea, then at least they would each have a cmoy to use.
perfromance wouldnt be as good though
fair call. not quite what the man had in mind when he popped his head in here though i'm sure hehe, that'll teach him to come here for help.....to spend his money.
making 4 separate cmoys and a basic buffered splitter might be a better idea, then at least they would each have a cmoy to use.
perfromance wouldnt be as good though
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