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Universal Audio LA-610 ground hum
Old 14th June 2016
Gear Head

Universal Audio LA-610 ground hum

Hello guys!

I just bought LA-610 for 400$ with weard ground hum present only on xlr line input. When i connect xlr send from my DAW with mic input or hi-z jack input everything works great, but line in has terrible ground hum.

I opened the beast and noticed that mic input xlr ground is connected to the chasis, but not the line input xlr. So i soldered a jumper, connecting chasis and xlr line input ground and problem has dissapeared.

However i wonder if it's possible that UA has made such mistake in design, or i could have done something very stupid and could damage unit bu soldering that jumper.

Regards, Matya.
Old 14th June 2016
Gear Head

The question actually is, should ground of the XLR be connected to chassis, if not why would they want to have this connection on Mic In, but not Line In?

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