Output drive is supplied by a discrete low impedance jFet buffer with superb sonic properties. D2O comes in two versions: A high gain all jFet design which is an ideal companion for ribbon microphones and a Hybrid tube/fet version. Quality Paper in oil coupling capacitors are used, all other used components are high-end grade aswell.
Low noise / Low ESR Power Supply
In single ended preamp designs the quality of the power supply is crucial, D2O is fitted with a discrete low esr voltage regulator built with low noise components enabling optimal performance to the amplifier circuit.
Switchable Transfomer Ratio / Input Impedance
By selecting the transformer ratio swich a selection between a 1:2.5 or 1:5 transformation ratio can be made. Besides setting voltage gain, this also switches the input impedance of the amplifier between 2.25KOhm and 9 KOhm.
Selectable Feedback Ratio Sets Gain and Character
The feedback ratio switch determines D2O's open loop amplification, besides amplification factor it also influences the preamps character. Less feedback (70dB position) means less supression of even order harmonics which is percieved by the human ear as a richer tone. when recording harmonically rich sources more feedback (50dB position) can be applied to achieve a more analytical sound.
- switchable transfomer ratio / input impedance
- selectable feedback ratio sets gain and character
- Low noise / dc-dc converter
- stepped attenuator
- phase reverse switch
- phantom power