Could you go into a little more detail about the mod? Is the filter a bit different? My only complaint about the rat was the loss of low end. I sold my 87 small box and I miss it. Does this one have the lm308 chip? Thanks!
I'm sure on the specs of the mod but the gain stage that causes the loss of low end was cut so now it has better bass response. I don't think the filter switch has been messed with. It still has the same function.