Svetlana-4 is a high-end tube DAC that supports DSD 256, DXD 352.8kHz, PCM 32Bit / 384kHz. USB 2.0 and SPDIF digital inputs are supported, it can be used as a tube preamplifier through RCA Analog Output. Typical DAC's with semiconductors applied to analog outputs have the advantage of relatively cheap prices but have a tendency to produce "dry" sound.

Svetlana-5 is a high-end tube DAC that supports Bluetooth 5.0 aptX™ HD, PCM 192kHz/24bit. SPDIF digital inputs are supported, it can be used as a tube preamplifier through RCA Analog Output. Connect to your audio system, Bluetooth-enabled smart phones, notebooks, portable music players and music video services, you can easily enjoy high-quality wireless.

Prelude-5 is a high-resolution vacuum tube DAC that supports DSD 512, DXD 352.8 kHz and PCM 32Bit/384 kHz. All digital inputs are electrically insulated to support digital input ports for USB 2.0 and SPDIF inputs, which are free from noise. The Prelude-5 can be used as a high-end vacuum tube preamplifier through the True Balanced XLR and RCA Analog Outputs. Prelude-5 is designed for analog output stage using the "Quadruple Mono" method.