Bartolini TC3 Booster Preamp
The TC3 discrete preamplifier/booster with preset minimum gain of 12dB - can be boosted up to 40dB - for low to medium output pickups - 9 volt only.
The TC3 can be wired in a way that boosts the signal up 12dB without altering the signal.
It also can be wired so that different parts of the spectrum are boosted using a potentiometer and it will boost up to 40dB.
A good application of this unit would be to use with a traditional passive bass that has lower output.
The wiring diagrams and includes from Bartolini are helpful in understanding all the possibilities. Click here to view those documents.
Bartolini TC1 Booster Preamp
The TC1 preamplifier is designed to improve the performance of electric instruments by increasing the signal level, modifying the tonal quality with a wide range of options, and decreasing the treble losses in the cable.
The TC1 preamp can be used in the unboosted mode to provide equal amplification of all frequencies. The boosted modes allow tonal changes ranging from simple treble boost to a midrange spectrum shaping specifically designed to overdrive amplifiers to their best distortion sounds.
The TC1 preamplifier is hand-made from discrete components (no I.C's) for very little noise levels, outstanding distortion characteristics and very long battery life. They are rugged, reliable and very easy to install and in most cases do not require modifications to the instrument.
Typical application for the TC1 preamp is for Guitar.