Dionysos

DIONYSOS MkII

Tube line-level preamplifier with remote control.
The line-level preamplifier remains the central component of any high-end audio system with a separate preamp and power amp. It is responsible for source selection, signal processing, and volume control. It must process the signal from the source and adapt it to the power amplifier’s requirements.

Its purpose is to drive any power amplifier using cables of any length while maintaining optimal sound quality on both balanced and unbalanced outputs. The Dionysos is Thrax Audio’s answer to these needs. Its input signal provides an optimal foundation for the rest of the system, allowing it to truly shine. This allows for the extraction of the maximum amount of information contained in the signal, while effectively suppressing interference encountered along its path that causes distortion. The use of a transformer in the design ensures complete isolation from the rest of the system. This solution suppresses common-mode signals much more effectively than active circuits, while also blocking radio and electromagnetic interference.To further maintain the already low noise level even below a certain volume threshold, a self-disabling active circuit was implemented, and the attenuator was connected directly to the output, ensuring a low-impedance, noise-free signal. A low-noise version of the 6N6P EV dual triode serves as the amplification stage.  Volume control is based on a resistor ladder. The adjustment range from -46 dB to +18 dB in 32 steps allows for precise volume tuning. We have six line inputs, a tape loop output, and two pairs of power amplifier outputs at our disposal. We can choose whether to use the RCA or XLR outputs using a switch on the rear panel. For all RCA inputs and outputs, you have the option to disconnect the GND. The Dionysos’s power supply is based on a 6C4P rectifier tube and a choke. This helps reduce switching clicks and other interference occurring before the choke. This solution also helps maintain a constant voltage across the capacitors. As a result, they can operate much longer and more efficiently. At the heart of this advanced design is a microprocessor. It controls the relays, receives commands, and monitors the device’s status. The housing is made of thick, CNC-machined aluminum blocks, which provide the product with adequate mechanical rigidity, functionality, and a distinctive appearance.

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