SongBooks optimize also gives the user control over the audio output via analog EQ

Pickup cleaning gel – cleans the needle of microparticles without damaging it

Simply turn one knob to wrap your sound in warmth and depth—from individual tracks

Advanced double pedal for professional needs

with a 24db low-pass filter

Rotosound Jazz Bass Strings Jazz Bass 77 - Set 6-string Flatwound Standard 30-130 (RS776LD) AFHENTNING SongBooks optimize also gives theMonel flat wire wound, legendary deep, solid sound Long scale (34" 860mm) also suitable up to medium (32" 810mm) 4 string: SM77 Hybrid . 040"w, . 060"w, . 080"w, . 100"w. RS77LD Standard . 045"w, . 065"w, . 085"w, . 105"w. RS77LE Heavy . 050"w, . 075"w, . 095"w, . 110"w. SH77 STEVE HARRIS Signature Heavy . 050"w, . 075"w, . 095"w, . 110"w. Custom 5 string: RS775LD Standard . 045"w, . 065"w, . 085"w, . 105"w, . 130"w 6 string: RS776LD 6 string