ALLNIC ELECTRONICS

Introducing ASRA RD-7500 OTL/OCL DAC.  This is Allnic’s fifth digital to analog converter to date.  The OTL/OCL technology was first used in Allnic’s original headphone amplifier – the HPA-5000.  From this evolved an entire line-stage preamplifier product line, headphone amplifiers, a Signature phono preamplifier, and the last three digital to analog converters.  Similar to the line-stage preamplifier line, each OTL/OCL DAC model offers subjective strengths that make it unique, adding benefit to music systems when strategically applied.

While Allnic’s - and the industry’s - first OTL/OCL DAC, the D-10,000, is now replaced by the more sophisticated ‘Signature’ D-15,000, a handful of D-10,000 units are currently available on special discount.  The D-10,000’s OTL/OCL circuit topology is similar to that of the newest D-15,000 'Signature' dac.  The benefit of the D-10,000 for some is the user's ability to use Waversa Systems’ interpolation algorithm to set oversampling and conversion to DSD.

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Experience with the D-10,000 led Allnic, in collaboration with semiconductor expert Abel Kang, into a year of research and development, which proved a successful endeavor. The work resulted in a new digital circuit design to optimize the SABRE ES9039PRO digital-analog conversion, eliminating filtering, oversampling, and PCM/DSD conversion.  However, Allnic and Kang’s focus was on both digital and analog circuit design. Insight was gained into options for power supplies and the use of the highest-quality materials. These materials were designed to deliver the best sound quality, reliability, consistency, and simplicity at different price points.

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While the digital specifications of the ASRA DAC mirror the ‘Signature’ D-15,000, there are some significant differences.  ASRA has only one SABRE chip; the D-15,000 has two.  The D-15,000 features I2S connectivity, while the ASRA features universal Bluetooth capabilities.  While each of these DACs features independent digital and analog power transformers, only the D-15,000 'Signature' has complete digital galvanic isolation.  The power transformers for each model have the same material and construction but are spec'd optimally for each circuit.  Furthermore, the OTL/OCL circuit topography is unique to each.  The D-15,000 uses four tubes per channel, while ASRA has only one tube per channel – the 5687, with equivalent options: E182CC, 7044, 6900, 7119.  This makes tube rolling, even for the rarest unicorn, affordable.