https://bartolini.net/product/hr-2-2-iwb20/
Ibanez GWB Upgrade 2 Band NTBT Preamp - HR-2.2-IWB20 - Bartolini Pickups & Electronics
Aug 6, 2026 - Custom Voice upgrade for GWB20, GWB35 NTBT 2 Band EQ - (Vol with Push-Pull Active-Passive) (Treble/Bass) - with Knobs, No jack
ibanezgwbupgradebandntbt