
There is no cause for concern. We have good news, and the future of our amplifiers is bright.
We worked hard in the last two years, and now we have a NEW 4CX800A tube – a functional replacement of the GU74B.

Also, starting January 1st, 2024, we will only offer our NEW 4CX800A tube as a spare part and a replacement for a GU74B tube.
The new 4CX800A tubes are produced in China by our long-time supplier and producer of 4CX1000A tubes. ACOM invested a significant amount of money to develop our tube testing processes and special tube testing measuring equipment. All new tubes are tested in the factory with ACOM's developed and manufactured equipment to meet our quality and technical requirements.
For current prices, kindly refer to our esteemed dealers or get in touch with our Customer Service Department | Technical Support Team directly.