The Sadowsky 4 knob Onboard Bass Preamp is a completely prewired system offering the same controls and preamp as all Sadowsky Basses.


VTC=Vintage Tone Control (pull up for total bypass).


The preamp can be installed with the included control plate or mounted through a rear control cavity in either a 4 in line or diamond pattern. Pickups attach via solderless connectors at the pan pot. Direction of the pan pot can be easily reversed by which pickup terminals are used.  Installation requires a side jack and a battery compartment. 


This system is not compatible with EMG or any other active pickups requiring anything other than a 250K or 500K volume pot.  For these applications, please custom order a parts only preamp kit and use your original volume pot.

Sadowsky Onboard Bass Preamp 4-Knob - Retrofit


    Contact Us 聯絡我們


    Unit 6, 18/F, Max Trade Centre,

    23 Luk Hop Street, San Po Kong, Kowloon,

    Hong Kong

    香港九龍新蒲崗六合街 23號 萬昌中心 18樓 06室

    Tel: 852-2320-2680



    Quick Links


    About Us 


    Shop Guitars 


    Shop Bass


    Shop Pedals



    Payment Methods:

    • Facebook Social Icon
    • Instagram Social Icon
    • YouTube Social  Icon
    • SoundCloud Social Icon


    HSBC Installment Plan

    © 2017 Uni•Sound All Rights Reserved