How to… get your acoustic to open up
by claesgellerbrink
Goya GG-172 Made in Sweden by Levin in 1970
A great way to improve the tone of your acoustic guitar and to get it to open up is to use a normal air pump from a fish tank to give the top a massage. I got an old one, I think the older they are the more they vibrate, that I use on guitars that I buy that hasn’t been played for years. It works great and seems to add both bass, volume and clarity to the guitar. A day or two with the pump is like months of actually playing.
Claescaster 
[…] like this Sigma much, I thought it sounded stiff and boring but after two days with the pump and a week of heavy playing I was sold. I’m not sure if all Japanese Sigma’s are this […]