Hi. I've joined a band who need the bass tuned to drop A#. The higher string of a 5 string isn't needed so I'd rather just use a low tuned 4 string. I've set it up with 130, 105, 85, 65 strings, filed the nut and set the action nicely but I cannot get decent intonation on the A# string. Could it be a problem with the bass or this low tuning?
The bass is an Ibanez SR300, a cheap but usually solid instrument. I was planning to upgrade if I get on well with the band.