User manual

T25 Tube Compressor API Select
14
A4 User Accessible Maintenance
A4.1 Tube Replacement
The T25 Tube Compressor features 12AT7WC and 12BH7 dual-triode vacuum tubes in each channel.
The factory installed tubes are selected at API for optimal performance.
All tubes are socketed and can be replaced if required.
• Make sure power switch is off
• Make sure the unit has been unplugged for at least 5 minutes before opening the chassis
• Four screws on sides remove the lid and allow access to the printed circuit board
• No user tube bias adjustments
A4.2 VU Meter Level Jumper
A marked internal jumper selects between 0VU = +4dBu and 0VU = +14dBu for the OUTPUT LEVEL
VU meter (one per channel).
• Make sure power switch is off
• Make sure the unit has been unplugged for at least 5 minutes before opening the chassis
• Four screws on sides remove the lid and allow access to the printed circuit board
• No user calibration adjustments