Low mic signals...

[SteveHalv]

When using my Lexicon Omega with an SM57 or SM58, the signal from the mic is weak. I have to crank up the pre-amp really high to get a decent signal. Any thoughts on this?

[Electriclight]

Run a line from Insert into the Line Input to add a second gain stage.

[timaging]

Originally Posted by Electriclight

Run a line from Insert into the Line Input to add a second gain stage.

I have this same unit, but don't see anything on there titled Insert or Line Input?

[Electriclight]

Well you will have to look on the back side...each of the two mic inputs has an insert, for effects mostly. There are also 4 line inputs back there.

Here is straight from Lexiconpro:
I can not get enough signal level from my microphone with the Omega, what’s wrong?Make sure the 20db pad for the microphone inputs are not active. These switches can be found on the back of the Omega and are used to attenuate a signal that causes clipping even when the gain for the microphone is turned all the way down.

The Omega’s microphone preamps provide 50dB of gain which should be enough for most applications. If you are using a microphone with low sensitivity or if you are recording a relatively quiet signal 50dB of gain may not be enough.

It is possible to link two gain stages on the Omega together for increased gain. To do this, make the following connections: Connect the XLR microphone cable into the Mic 1 input. Connect one end of a typical TS instrument cable to the Mic 1 insert jack. Connect the other end of the TS cable to the Line 1 input. Use the Mic 1 and Line 1 knobs to increase your gain to the desired level. Since the microphone signal is being sent to the Line 1 input, the signal will need to be assigned to a USB audio channel using the Line 1 USB Assign switch. This configuration will allow for more gain, but the noise floor will also be increased.

Lexicon Pro