I have a porter-cable pancake compressor it works fine but won't run a frame nailer and is way to loud for me. I was looking at the Ridgid oil lube twin stack but i heard 1 running and it's louder then the porter-cable i have. I was the local TSC store and they had a Iron horse 2.5 HP 4 gallon oil lube twin stack that runs at 1720 rpm whitch is half the speed of most small compressors. They had one ine the back that they use so I could hear it run it was so quiet you could stand 5 feet from it and talk in a normal voice and be heard. I think Ridgid should look into making there oil lube compressors run at 1720 rpm. Ridgid told me there compressor runs at 86-88 db the iron horse runs 78 db. For every increase of 3 db there is a 100% increase in sound energy.
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