WISA Audio Pump for ET2 tonearm

Mine was different. It had 4 holes to accept some sort of rubber feet. Thanks for pointing this out.


Upon thinking about it, the 4 holes in the metal frame that are present in your picture....This is where I placed the rubber isolators I found as this part of the structure is lower and is what comes into contact with whatever the unit is placed on. My unit had the O-rings but they were clear and had not broken down. The O-rings allow for the unit to be isolated from the frame structure.

My WISA pump looks very similar to the one in the web link above.   I am looking for the four green O-rings.I just came back from ACE hardware.  In the plumbing section they have 3/4 x 9/16 x 3/32 #11 O-ring. from DANCO Inc.I tried on my pump.   A bit too noise and an option is everything else fails.  Thank you.

I don't know if the green ones in the pic above are original or not because mine were also clear (slightly yellowed from age). 

I went to my Sears Hardware and tried 3/4 x 9/16 x 3/32 o-rings, but the weight of the pump caused it to contact the mounting base:

https://i.imgur.com/7OANV2n.jpg

I then tried  7/16 x 11/16 x 1/8 and it looks perfect.  Notice the gap between the base and the pump:

https://i.imgur.com/Xj26zWr.jpg

https://i.imgur.com/a1mhIgw.jpg 

Noise/vibration seems the same or less  than with the original o-rings.  I'm not surprised since the originals were pretty hard and did not return to a round shape when removed. 

dcaudio, I'd buy a set and ship them to you, but they have less than four left!  Let me know if you don't have any luck and I can check back later to see if they re-stock.  They are pretty bad about restocking, though.  You can also try McMaster Carr.  They have a huge selection of different materials in this size.