Triton Audio D2O Mono / Fet Preamp B-Ware

Low noise discrete microphone preamp

D2O is a low noise discrete microphone preamp, it is a further development of the famous German V series preamps of the 40's and 50's, widely recognized as one of the best sounding preamps.

D2O is available in three versions

• A single unit standalone preamp

• A 19" Stereo rack mountable version

• A single slot 500 format unit

Gratulation to the api 500 version! I am testing in very different surroundings different instruments and comparing with different pre amps. Almost cannot find any difference comparing with my V72 congratulations - neither with flute neither with saxophone.

General layout

D2O's general layout consists of a Lundahl 1571 input transformer followed by 2 single ended gain stages. The second gain stage can be selected to be either a high gain Fet or a Tube stage. when the high gain, all Fet circuit is engaged D2O becomes an ideal companion for microphones with a relatively low output like ribbon microphones. With the hybrid Fet/Tube circuit is engaged the sonic benefits of having a tube in the signal path can be utilized. Output drive is supplied by a discrete low impedance Fet buffer with superb sonic properties. 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 transformer ratio / input impedance

By selecting the transformer ratio switch a selection between a 1:1.75 (LO) or 1:3.5 (HI) transformation ratio can be made. Besides setting voltage gain, this also switches the input impedance of the amplifier between 2.25KOhm and 6.25 KOhm. Different transformation rate and impedance selection options are very desirable as they allow for more sonic options from the connected microphone.

selectable all Fet or Tube-Fet circuit

The Tube-Fet switch determines whether D2O functions as an hi gain, all Fet or hybrid Tube-Fet circuit, each with its unique sonic character

Features:

•     Low noise / low esr power supply

•     switchable transfomer ratio / input impedance

•     selectable feedback ratio sets gain and character

•     stepped attenuator

•     phase reverse switch

•     phantom power