Orange introduced the OV4, a device designed to be retrofitted into four-valve fixed-bias guitar amps. According the company, the OV4 – which must be installed by an authorized Orange service technician – promises to automatically bias output tubes, continually adjust bias to ensure peak performance, and improve tube longevity. Orange also claims several diagnostic and performance-friendly benefits, such as automatically switching out faulty tubes and running the amp on half-power.
Orange Divo OV4 Features:
- Automatically biases output tubes
- Continually adjust bias to ensure peak tube performance
- Improves tube longevity
- Automatically switches out faulty tubes and runs the amp on
half-power - Auto-compensation for faulty mains











