“The Preamp” features a two-stage amplifier concept as its core principle. The initial stage acts as an input and symmetry amplifier, efficiently amplifying and converting the input signal into a balanced signal in a single discrete stage. This design minimizes signal paths and reduces components that could impact the signal. With its balanced configuration, the amplifier offers enhanced interference protection and significantly extends the bandwidth, all achieved with just one amplifier stage.

The second stage serves as the output amplifier. While it doesn’t provide voltage gain, it acts as a pure impedance converter with ample current reserves. The output stage of “The Preamp” is fully balanced, double mono, utilizing four NOS PCC88 tubes per channel. These carefully selected tubes offer exceptional linearity and high bandwidth, ensuring minimal distortion and a low output impedance. The signal path is exceptionally short.

The amplifier channels are isolated from the housing and mounted on separate low-resonance sub-frames, effectively safeguarding them against external interferences like microphonics and mechanical resonances. The ten tubes in the input stage are meticulously selected and paired to ensure optimal performance. The input stage, known as EINSTEIN, maintains absolute linear phase and an expansive bandwidth, facilitating ultrafast and unadulterated signal processing. To ensure tube longevity and balance operational losses, EINSTEIN has devised a sophisticated circuit directly implemented at the input tubes.

In adherence to the ideal case of the reinforcing wire, the volume control in “The Preamp” operates outside the signal path. As a result, the signal and signal-to-noise ratio remain unaffected. The EINSTEIN volume control circuit ensures consistent signal purity and signal-to-noise ratio regardless of the volume position, a level of implementation unmatched by any other manufacturer in the audio industry.

Another remarkable feature of “The Preamp” is its input selector circuit design. It operates without the need for switches, relays, FETs, or ICs. The EINSTEIN input selector circuit achieves its functionality by booting and powering down the heating voltage of the corresponding input tubes. This approach ensures that the input signal remains unaltered, free from any sonic or measurement limitations imposed by switches, relays, FETs, or other components. This unique circuit design sets “The Preamp” apart as a one-of-a-kind solution in the high-end audio realm.

The fully balanced output stage of “The Preamp” utilizes four carefully matched and selected NOS EI PCC88 double triodes per channel. With an exceptional bandwidth extending into the MHz range and the ability to deliver ultra-high current, the output stage ensures an incredibly fast playback with remarkable detail and a realistic soundstage. This innovative circuit design possesses abundant energy and a low output impedance, enabling it to effortlessly drive even high-sensitive speakers.