The Aavik U-300 RIAA section is based on a discreet, floating, balanced, ultra-low noise, bipolar input circuit. By nature, the topology of a moving coil cartridge is a floating, balanced signal generator. We have kept this floating, balanced circuit topology throughout the phono stage. The floating input circuitry allows us to use ultra-low noise, bipolar transistors. By paralleling several transistor pairs, we have created a dead-quiet input section. The Aavik U-300 phono stage has a 62 dB gain, and the cartridge loading is adjustable from 50 ohm to 5 kOhm.
The phono section of the Aavik U-300 will let you explore the amazing details and musical depths of your vinyl collection!
The Aavik U-300 DAC section is designed around 5 digital inputs, which all excel in performance. The DAC performs without any digital signature, which makes any music sound “analog”. The digital circuits are created with the best high frequency skills tools available and great care was embedded in the PCB design. We made a lot of effort to ensure we have a 100% equal treatment of the differential signals, with time-aligned, ultra-short, 4-layer PCB traces. The DAC’s circuits are fitted with ultra-low jitter onboard clocks in order to minimize timing errors in the digital-to-analog conversion. In the Aavik U-300 all DAC circuits are isolated with 13 onboard, separate low-noise, high-PSSR voltage regulators each feeding only one stage of the signal handling.
The USB input is galvanic isolated to avoid noise pollution from the host. The digital signals from the 5 digital inputs are routed to an ASRC, where they are resampled and re-clocked to 200 kHz/24 bit PCM, feeding current output DAC chips. The current-to-voltage conversion is performed with a differential floating topology with virtual GND. This isolates the signal path from the potential GND noise and signal induced GND modulation.
Line Stage / Volume Control
The Aavik U-300 line stage uses a unique, inverted, virtual GND amplifier topology, which preserves the finest musical details on a dark, quiet, black background. The line stage gain can be adjusted between 0-6-12 dB – on the amplifier’s digital inputs the line stage gain can be adjusted 0-6 dB. These adjustments give you the opportunity to adjust individual levels of all inputs on the Aavik U-300 amplifier.
The volume control is realized with microprocessor-controlled resistor-ladder (R2R) circuit inside a virtual GND amplification stage. The volume control regulates from -80 dB to 0 dB in approx. 1 dB steps.
The Aavik U-300 design is typical Scandinavian, with a simplistic functionality and a minimalistic look. The cover is made of anodized aluminum, which gives it a stunning matte black finish. The only other colors seen on the front panel of the Aavik U-300 are small LED lights indicating your current volume/gain/source/cartridge settings and three silver buttons on the top panel. Adjusting the Aavik U-300 settings is easy, because all settings are controlled with the three buttons and a big rotating knob.