Orange OV4 For 4 Octal Valve Amplifiers

NOTE: B-Stock from Orange, broken packaging, otherwise in mint condition, full warranty.

Orange DIVO OV4

Automatic BIAS adjustment for power valves

The Orange DIVO OV4 with TubeSync technology eliminates the need for manual bias adjustment. It automatically adjusts the bias of each valve, monitors amplifier performance, and isolates faulty valves when issues occur, allowing the amp to keep running at half power until the valves are replaced. This extends valve lifespan and ensures greater reliability.

Features and use

The DIVO OV4 supports different valve combinations without modifying the amp. With the “share the wear” function, valves are rotated for even usage, or different pairs (e.g., 6L6 and EL34) can be used as tonal options.

When idle, the OV4 lowers bias to reduce wear and instantly restores it when a signal is detected. Faulty valves are identified via warning LEDs and recorded in the included software, which also logs total operating hours with and without audio.

The module comes in a sturdy aluminum housing and is mounted using the supplied bracket or industrial Velcro. A jack socket allows connection to a standard footswitch for switching between full and half power.

Specifications

• Technology: TubeSync

• Automatic bias adjustment for each valve

• Performance monitoring of amplifier

• Isolates faulty valves (half power mode)

• Compatible with standard octal valves (e.g., 6L6, EL34)

• “Share the wear” function for even usage or tone variation

• Lowers bias when idle to extend valve life

• Operating hours logging via software (with/without audio)

• Warning LEDs and fault logging

• Aluminum housing with bracket and industrial Velcro

• Footswitch connection (full/half power)

• Fits most Class A/B fixed bias amps with octal valves (≤ 500V anode voltage)

• Not compatible with ultra-linear Twin Reverb