I tune my 5 string to the G#,C#,F#,B,E LOWEST TO HIGHEST, SABBATH TUNING. ANYTHING BELOW THE G# YOU WILL PROBABLY NEED AN AURAL EXCITER TO MAKE IT PUNCH AS THE G# I USE ALMOST FARTS AS IS AND ANY LOWER TUNING THE SPEAKERS IN MOST AMPS CAN'T DELIVER THE HZ FREQUENCY REQUIRED FOR THE NOTE TO SOUND. I HAVE BLOWN COUNTLESS SPEAKERS USING THIS TUNING BUT TAKE THE F#, FEEDBACK IT THROUGH THE AMP AND PRESS THE ON THE 3RD FRET E, LET IT KEEP FEEDING BACK AND LISTEN TO THE WHOOP WHOOP OF THE HELICOPTER LANDING IN YOUR HOUSE. TOUGH ON SPEAKERS THOUGH SO BE CAREFUL. IT GETS ENOUGH VIBRATION FROM THE CLASHING NOTES REVERBERATING I HAVE DISLODGED MIRRORS OFF WALLS AND CABINETS AS WELL. BUT NO SOUND LIKE THE POWER YOU CAN ACHIEVE WITH THE DETUNED TUNING OF SABBATH. The other good thing about this tuning is using it fretless and you are never out of tune playing some of your favorite covers without ever having to retune your bass in 99% of the bands out there. A few exceptions but for the majority it worked for me for over 40 years of playing my bass. Try this tuning sometime and post what you think. But use an aural exciter or active pick ups when trying it.