Our low noise integrated circuit Class A pre-amplifier has been specifically designed to overcome the problems often encountered with amplification of Acoustic Instruments fitted with ceramic transducers. A frequent cause of these problems is the mismatch of level and impedance in the electrical circuit between the pickup and the amplifier: this mismatch has been completely eliminated with the introduction of our Acoustic Instrument Preamp/ D.I Unit.
The pickup output should be connected directly to the Preamp input with a short, low loss, screened cable; the Preamp output can now be fed to any effects or volume pedals (if used) and then on to the amplifier. The Preamp gain control should be adjusted to a comfortable signal level with the amplifier volume control set to about 50%. Alternatively the gain can be set to match the signal level of another instrument (e.g. Electric or Bass Guitar) when they are both fed into the same amplifier.
Players of Acoustic (Double) Basses will find their previous problems with lack of low frequencies; poor sound when playing Arco; poor sound with volume or other pedals; poor response to double stopping; poor D.I. sound etc. etc. will be completely eliminated when our Preamp is used.
The D.I. output is a transformer coupled low impedance source on a male XLR connector. Pin 2 is in phase with the preamp input; pin 3 is reversed phase and pin 1 is the ground connection.
Also fitted is an auxiliary output, which may be used to feed a signal to a Tuner; this signal is identical to the main Output signal.