KRK rokit 5 speaker Part Identification

[Maxwell55]

Hi, I'm hoping someone could help me identify 2 components on a KRK RP5 G3 mainboard. These are labeled ES0 and ES1 and are on the RCA plug circuit.
They blew up when I attached a hot RCA cable.   Thank you

[David_AVD]

How have you determined that they have failed?

[Maxwell55]

I've shown you a picture of the good speaker,
I've determined they're blown from the following picture of the failed speaker.
Have any idea what they are?

[fzabkar]

They appear to be bidirectional ESD protection diodes.

[Maxwell55]

Thank you for replying, I thought is was some kind of diode but wasn't sure. I don't have any specs of those 2 parts. I'll try to shine a light sideways to see if it shows anything, otherwise how could I find a replacement?

[gamerpaddy]

unusual package for a diode, they are usually encased in plastic not ceramic
ES might stand for ESD
i would have guessed a ferrite bead, but as its between signal and ground i think its more like a ESD protection
might be a varistor  https://www.meritekusa.com/product-category/esd-protection/esd-varistor/
desolder a working one, apply a voltage with a very low current limit and see when it starts clamping at.

[Maxwell55]

Unfortunately I don't have a power supply to be able to do such a test with one of those components. I'll have to find the part number

[David_AVD]

How did you send such a significant voltage into the audio input to start with?

[gamerpaddy]

this might be it
the "ESDA" marking in the schematic got me this:

https://www.tti.com/content/dam/ttiinc/manufacturers/eaton/doc/Eaton-Polymer-ESD-Suppressors-SurgX-Technology-ESDA-datasheet-specifications.pdf

[Maxwell55]

HI, thanks for the info, I managed to get close for a shot in many angles, I am able to see some markings on one of them but unable to determine exactly what it says.
I'll see if I can try to get a better shot, I'll include it, maybe you can detremine what it says?