Frequently Asked  Questions


What are the advantages of transmission line speaker cabs?
Transmission Line speakers as designed by EA provides a more extended low frequency response than other cabinets the same size. Our Transmission Line cabinets’ impedance curve draws more current from the amplifier in the low end than conventional vented enclosure so there is more output in the low end.

Why are the mids on Channel 1 and Channel 2 on the Micro and Doubler set differently?
Channel 1 mid is about 500Hz, channel 2 mid about 800 Hz. Channel 1 is optimized for Electric Bass while Channel 2 is optimized for upright. The suggestion to optimize Channel 2 came from Mike Arnopol, Bassist for Patricia Barber. Many of Mike’s suggestions were incorporated into the Doubler.

Does the Micro have a High Pass Filter?
Both the Micro and Doubler have an internal HPF on Channel 2. Additionally, the Doubler has a variable HPF on Channel 2.

How do the trim pots on the Micro and Doubler work?
The Trim Pots on the Micro and Doubler work as the name implies. Turning them clockwise trims the signal. Turning them counterclockwise increases the signal. Turn them until you get the output or volume balance that you require.

What kind of foot switch do I need for the Micro and Doubler and what can they control?
You can control either the channel change function or the mute function or both. A single momentary footswitch will control the channel switching capabilities of the Micro or Doubler. To control both the channel switching and mute functions, you will need a dual, momentary foot switch that is wired with a stereo 1/4″ jack. With a single instrument plugged in the IIS on my Doubler seems to work differently than on my old Micro 300. In order to use the EQ settings on either Channel 1 or Channel 2 on the Doubler with a single instrument plugged in, you must use Channel 2 as the default input.

If I should not use the bottom bail on my cab for a handle, then what should I use it for?
The bottom bail has 2 important functions. First it allows you to decouple from the floor. This is especially important if you are playing on a big, hollow, wooden stage. Secondly, the bottom bail allows you to point the cab more towards your ear for better, on stage monitoring.