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Review and Measurements of New JDS Labs Atom Headphone Amp

Gradius

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Berwhale

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But its simple, you just need to trace from that relay closer to that 6.5mm female jack (headphones) and volume.
I'm not sure what you mean. I was thinking that I would need to insert a DPDT switch into the circuit to bypass the HP socket and route L & R signals directly to the RCA outputs (regardless of anything being plugged in the socket).

Here is my crude diagram...

20201029_102020 (Phone).jpg


I assume that this would involve either breaking traces on the PCB or desoldering some of the pins on the HP socket (which would be preferable to me as it's less destructive).

Is there an easier way to do this?

Thanks, I know about the knob ;) https://www.audiosciencereview.com/...cal-clear-hd600-around-400.10063/#post-273346
 

solderdude

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Is it a problem when the line out is always connected ?
In the latter case the modification is extremely simple.
 

Berwhale

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Is it a problem when the line out is always connected ?
In the latter case the modification is extremely simple.
Ideally, yes. But if the modification is much simpler, then it would be considered.
 

solderdude

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It is simply a matter of removing the PCB and soldering 2 pieces of wire underneath the 6.3 headphone socket.
When you plan on doing this I will draw which links to make.

You can also simply put a switch in place in which case you can toggle it on and off.
 

Berwhale

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It is simply a matter of removing the PCB and soldering 2 pieces of wire underneath the 6.3 headphone socket.
When you plan on doing this I will draw which links to make.

You can also simply put a switch in place in which case you can toggle it on and off.
Will this allow me to keep the headphones plugged in, but not driven when i'm using the RCA output?
 

solderdude

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Nope, when that's the object of the game perhaps the easiest way is to make an external switch box connected to the HP out and use 2 switches.
One that connects the headphone and one that connects to the amp or device you want to use.

Otherwise you need to modify the amp, cut some tracks and run some wires to switches
 

Berwhale

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It i'm going to do it, I want the switching all internal, otherwise I might as well stick with pulling the headphones to switch.

I researched this a while ago and found an Alps latching push DPDT switch and a switch cap that looked like it would match the other two on the front of the Atom. I think there's enough space to mount the switch to the left of the headphone socket.
 
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Ok, so would be great to use to reduce volume between a DAC and a poweramp with no gain control. Only missing a remote controlled volume wheel. Would also liked a RCA second input instead of 3.5mm but to connect a phono preamp, but a 3.5mm to RCA adapter can be used to connect it. Would 3.5mm to RCA affect audio quality?
 
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I have owned this amp for a while, I paired it with a topping d50s. I was thinking about gettign the LCD-2F, and was wonderign if it has enough power to properly drive those headphones?
 

Gradius

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Can anyone suggest me an alternative 220V power brick for Atom AMP?
Hi. I have the original one.

But since it weights 1kg, and the plastic is really thin, is easy to damage.

Mine's also got damaged. I have to use super glue on it.

They should have provided a better one, more study.

But yes. The original one is 16VAC @1A.

Gradius
 

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I do not advise buying JDS Labs products, one of my power supplies is broken, and the volume control is rustling on the amplifier. The new PSU was shipped free, but the overall quality is poor.
 
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