what is the quietest air pump for my ET-2 ?

I have utilized several compressors for my maplenoll. I now use a JUNAIR compressor that is pretty quiet but i could hear it if it was in the same room. I put it in a closet and i can not hear it. Junair also sells a compressor that is encased in a sound insulated case that you can not hear but its a little pricey. Not sure of the pressure a et2 takes so depending on the pressure, there might be many alternatives. If you look on my maplenoll string, there are several references to compressors particularly WISA superquiet and others.

Oilmanmojo, yes this is a good recommendation. A friend of mine told me about the Troll from Junair and I ordered one yesterday. It should be very quiet. Nevertheless I do think I have to build a sound insulated case.

I have a Sil-Air compressor that came with a Kuzma Airline I bought a month and a half ago.

It's very quiet and probably could run in the same room as your equipment. I chose to have it running in an adjacent room, however.

Chris

Ckniker, I use the Kuzma Airline too and also the Sil-Air Compressor. Nevertheless one has to run the Sil Air Compressor in another room (I do so too)because every 8 minutes you hear a sharp sound (zzsch) when the air echausts. People told me that the Jun-Air Troll/Minor 3-4 should be even better than the Sil Air.

Even pumps marketed as whisper quiet typically have >30db noise. I don't know what pressure/flow rate the ET arm requires, but but if you are getting by with a low pressure pump, there is no reason to add the complexity, condensation issues, and expense of compressors. You might try the pump in an insulated & vented wood box. I cut noise of my 30db Rena 400 air pump in half by encasing the pump in a carapace of soft modeling clay, and placing pump and flow tank inside a plywood box insulated with several layers of cut-up acoustic ceiling tiles.