The Super Preamp provides noise-free performance.
The SP25B is an electret-condenser microphone that has been designed for acoustic bass. All of the parameters that are problematic for the double bass have been addressed. To be able to get the most gain before feedback it uses a very tight pattern to give a high rejection to surrounding noise, at the same time reproducing accurately the subtleties of the bass. As placement is especially important with an instrument that has a fine finish and varying dimensions, this microphone's attachment mechanism is designed to secure the mic to the bass in different positions taking seconds to attach. This mechanism is fitted with natural soft suede so as not to mark or mar instrument.
The SP25B uses the "super pre-amp" which has two XLR outputs, one of which has a ground lifted isolation transformer split. A quarter-inch line driver output with volume control is also included. The preamp runs off of battery, phantom power, or optional power supply. However it is recommended 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
Made from aluminum to keep the mass low yet extremely strong, this microphone will remain durable through many years of use. The flex arm is easy to position yet retains it's placement throughout the most active of performances. The mic has an LED that can be easily seen while performing. This indicates status of a battery or phantom power.