Have a great deal from my local GC , the NOS Rosewood finger board SR300E in Iron Pewter. With all flat onboard preamp setting, the Tap mode sound weak and thin; the Series mode sound louder with MID punch and the PowerTap bump some amount of Low/ Hi with little MID scoop. After spend some time to tweak the bass tone, i found the combination of Powerspan, preamp and 3 ways tab switch is the jewel of this bass guitar. Below is my tone setting opinion share. Tap mode Increase the onboard Preamp Bass around 30%, both MID and Treble keep noon. I get sweet both pup Jazz bass like sound, old school P vibe with neck pup and honky-bite J sound with bridge pup. Increase the Preamp Bass 30% also increase the output which i found equal to Series and Powertab in flat EQ. Series mode The Series mode make me a surprice. Keep both Bass and Treble on Noon, decrease around 30% on MID , only Neck pup solo . An aggressive finger pluck above the Neck Pup create me a sexy Epi Thunderbird solo neck pup sound !!!!! Honestly , i love the new Epi thunder Bird Pro IV neck pup solo sound but i meet neck dive problem in my previous test drive at GC. PowerTap mode Decrease the MID around 30%, keep both Bass and Treble on Noon, overall tone remind me the D'marzio Ultra Jazz pup voice. ** the string i use on the bass is GHS PW7200. Thks for reading.