2BA-221 Mic & Line Module FAQ

Q. My metering stopped working, how do I get them to work again?

A. When using the XLR +4dB tube output, use a balanced cable. If you need to use it unbalanced, float the low instead of tying pin 3 to ground.

Q. Can I use my 2BA-221 in another country with a different voltage?

A. The power supply in the 2BA-221 is internally wired from the factory with the specific voltage selected. Try using a step-up or step-down transformer. If you have further questions about this, please contact us and we'll do what we can to help. If you are ordering the 2BA-221 in one country and taking it to another with a different voltage, please place the order with your dealer and specify the voltage with them.

Q. When should I change my vacuum tube?

A. We have seen 10,000 hours and more out of our vacuum tubes without signal degradation. We accomplish this by regulating the heater voltage to the tubes, greatly increasing their life, something of a rarity if this industry. So, time is not as much of an issue as is sound. If you hear a ringing sound in your audio or when you rap your knuckles on the front, the tube is going microphonic. If you hear an increase in the noise floor, the tube may need to be replaced. Contact us if you need new tubes, we can help.