SP25B "Super Pre-amp" Information

"Super Pre-Amp"

The 'super pre-amp' has 3 outputs.  There are two XLR outputs.   The one on the left is your regular output to standard use.  The one on the right (in red) is the isolation transformer.  If you are playing with a PA and start to hear a 'hum', move the connection from the standard XLR output to the isolation or red output.  This should eliminate the 'hum'.  The 1/4 inch output is your line driver.  You can use the line driver in conjunction with your amp, and send the XLR signal to the house PA or recording device.  The Pre-amp works with Phantom Power or a 9-volt battery.  We recommend using the 9-volt battery all the time.  The line driver and isolation transformer will not work unless you have a 9-volt battery in the pre-amp.

The external volume control is for the line driver / 1/4 inch output.   The preamp also has an internal volume control that you can adjust with a screw driver.  You should only use this if more or less gain is required to match the gain on your existing amplifier.