Universal size for 12" speakers
Dome diameter: 80 mm - recommended for most of the guitar loudspeaker with average beaming

As the frequency increases, the radiation of a loudspeaker is increasingly focused on its center. If the listener is in this beam, the sound is extremely harsh and biting; if one moves to the side of it, the sound becomes significantly darker and treble components are partially missing.
To reduce this behavior, a diffuser is used. This sits directly in the beam of the speaker and deflects the high frequencies very strongly, it breaks the "beam". This makes the sound much fuller and more balanced.

This classic big bottle rectifier is the tube of choice for those famous, dual-rectifier amps. Clean and detailed while maintaining a warm and sweet tone, the 5U4GBEH offers gorgeous tube compression and articulate AC/DC conversion. The most desirable replacement ever built.

• Voltage Rating:    500 V
• Tolerance: 5%
• Operating Temperature Range: - 50°C / + 150°C
• Termination Style: radial

• Voltage Rating:    500 V
• Tolerance: 5%
• Operating Temperature Range: - 50°C / + 150°C
• Termination Style: radial

• Voltage Rating:    500 V
• Tolerance: 5%
• Operating Temperature Range: - 50°C / + 150°C
• Termination Style: radial

Rectifier

2 tubes, matched as pair

KT66 is a beam power pentode with an octal base and power of 25W. It has a powerful sound with a lot of headroom.

Files:

• Datasheet

Replacment for Fender Amps

• Chassis Hole: 17,5 mm
• Threading: 9/16 - 24