Left RCA out on DAC not working

The DAC is relatively new; I contacted the distributor, and he thinks it’s a badly soldered ground on the inside of the chassis.

If that is the case then why would the Lavri Grand ICs that have AECO plugs work? The AECO plugs have a metal strip on the inside of the "shroud" that makes contact to the outer ground contact of the RCA jack.

Are you sure you are plugging the RCA plug with the metal ""shroud" all the way on the DAC right channel RCA jack? It sounds like the center pin on the plug is not contacting the jacks center contact. Usually a loose and or open signal ground connection will produce a buzzing sound along with the music being played.

Make sure you are plugging both ends on the ICs all the way in to assure the center pin on the plugs are making good contact with the center contact of the jacks.

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@jea48 HI, thanks for your reply. The AECO plugs have no metal on the plug shrouds inside, apart from the pin, whatsoever.

The Lavri/AECO work perfectly. With other ICs, that have metallic shrouds, the left channel just doesn't work. The right channel works fine no matter which ICs I use. Checked and double checked with 3 different ICs, all fully inserted.

The AECO plugs have no metal on the plug shrouds inside, apart from the pin, whatsoever.

@painter24,,

Is this what the plug looks like? I can see the signal ground contact on the bottom of the inside of the plug "shroud". Look at the bottom of the inside of the "shroud" in the photo.

Look at the photo of the cable connection plug. Note there is a center contact terminal solder connection as well as a signal ground contact terminal solder connection.

The signal ground is required. It is part of the signal circuit. Often called the signal return.

The right channel works fine no matter which ICs I use. Checked and double checked with 3 different ICs, all fully inserted.

It has to be the center pin of the plug is not making contact to the center contact in the left channel jack. It sure looks from the photo I provided the center pin on the AECO plugs have what looks like a longer center pin than normally found on RCA plugs. Is that the case or is it just the photo that makes it look that way?

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@jea48  thanks for taking the time with this; I'll take another closer look.

If I'm wrong about the AECO, any idea why the left channel would only work with these plugs, but no others? Seems a bit odd, even to my ignorant brain (in these matters) 🤔🙂

@painter24,

I edited my post and added more info to it.