Thanks Zoey for the info. True, it is more like a master volume control, but heck all you do is run it through the effects loop and it works great. Heck they are easy to find on ebay and you can get one for around $28.00 so it is at least worth a try. I found that it worked great for me. I will be posting a song soon where we used it with the 5150 on my bands myspace page.