Installing active pickups on the guitar allows you to get a more complete sound in terms of frequencies. However, this comes at the cost of initially lower signal strength. To enhance it, preamps are used, which are powered by batteries.
To organize a working circuit for powering the preamp of active electronics, a crown container must be installed in the guitar body.
In this section of the online store Strunki.ru you can buy containers and connectors for the crown, which are necessary for the operation of active electronics, as well as related components with delivery throughout the CIS.