My main amp head is an Ampeg PF 800 that I dearly love . I had an Ampeg SVPCL preamp with a Crown XLS1500 that was the bees knees but wanted to downsize so I got the PF 800 . Tone wise the pre-poweramp rig was awesome but the PF 800 is very close and I have been very satisfied . I needed a backup amp and the PF 500 would be a no brainer but it just hasn't worked out . A Fender Rumble 500 head came up so I bought it during the pandemic . After reading the Rumble thread and reading all the good things said about them I thought it would be a slam dunk . Last week I brought the Fender head to practice and tried to get a tone that fit in our bands mix . After three songs I gave up and went back to my PF 800 . That night , last Wednsday , I put the Rumble up for sale and it sold almost right away . No Ampegs in the classifieds but there was a Genz Shuttle 6.0 . I had a Shuttle 9.0 a few years ago and liked it so I ended up buying the Shuttle . The amp came today and I took it to practice tonight . Wow , it sounded great right from the first song . Plenty of power and cut right through the mix . I used the previous owners EQ settings and it just killed . It won't dethrone my PF 800 as my number 1 but I do love it . It does show that as bass players we all have different tone goals . I also tried a GK 1000 RB but the tone just wasn't for me even though the amp was a powerhouse and cut like a knife . I'm sure the Rumble 500 head is great too but it just didn't do it for my tone .