Schiit Loki equalizer causing POPPING SOUND

Warranty if they honor it.

Did you try switching the cables from left to right in & out of the Loki to see if the sound moves to the other side?  That would confirm that its the Loki and not something else. (Example, the Loki could be fine but there is some DC offset from the preamp.)

It sounds like a coupling cap has gone bad perhaps. If this is in a chain with a tube pre, that would make even more sense. If that's true, consider having the tube pre looked at as well, or measure DC on the outputs with a basic multimeter.

My Bellari EQmade pops whenever engaging or disengaging the EQ or when bypassing it BUT that’s how it works courtesy of Bellari. My Lokius I’d dead quiet, no noises at all.  I would reverse the cables and see if it still pops. That will tell you if it’s the EQ or the preamp.

It’s for that reason that I have not listed the Bellari for sale.  I liked the frequency’s they chose compared to the Lokius but don’t want to deal with the complaints about the noise when it turns on or off. 

I use a couple of Lokis (Headphones mostly as the newer Max replaced one in my main rig) and a Loki Max and all are very quiet with zero noise when taking them in and out of the line, and the Lokis can even be turned off completely without a peep. The Max needs to stay on although it's out of the chain mostly...if you turn it off it cuts the signal to the amp.  I'd say the OPs Loki needs help...they'll fix it.

Thanks. Its better. Reversing RCAs. Keeping power on vs. O-ooneris CLASS D amp, $35 on Amazon… best 80 WPC ever!