I'm not sure this is the proper forum for this post, But I figured I'd ask the folks most likely to know. I recently picked up a used Conklin GT5, which I absolutely love. When I first fired it up I noticed the output volume was considerably lower than my other basses, and there was a noticeable hiss when I rolled up the treble. When I did my setup I raised the pickups, which helped both problems somewhat. I was wondering if raising the battery setup to 18 volts would be of any benefit, or would I just cook the preamp? The bass in question is the newer model with the bartolini pickups and the slap switch. I like to crank my amp up and play with a light touch, and I'm kind of running out of headroom. I really like the sound of the stock electronics and don't want to change things if I can avoid it. Suggestions?