Founded in 1986, we are a manufacutre of original digital audio products and micro-computer and network application products in Japan.We have original high technology and quality about digital audio products and micro-computerand network application products.The RSDA904 (90W x 4Ch full digital amplifier) was awarded as "Audio Excellence Award 2009" in 2009.The RDA-212 (30W + 30W analog input digital amplifier) was awarded as "28th MJ Technology of the year" in 2010.The RDA-520 (50W + 50W full digital amplifier) was awarded as "Audio Excellence Award 2010" in 2010.The RDA-560 (50W x 6Ch full digital amplifier) was awarded as "29th MJ Technology of the year" and as "Audio Excellence Award 2011" in 2011.The RDH20 (Hi-End headphone amplifier) was awarded as "Pure Audio Grand-prix 2010 SUMMER" in 2010.The UDAC192 (Hi-End D/A converter) was awarded as "Pure Audio Grand-prix 2010 SUMMER" in 2010 and as "29th MJ Technology of the year" and as "Audio Excellence Award 2011" and as "Pure Audio Grand-prix 2011" in 2011.The RUA220 (20W+20W USB digital amplifier) was awarded as "Pure Audio Grand-prix 2011" in 2011.The RUDD14 (USB digital to digital converter) was awarded as "Pure Audio Grand-prix 2011" in 2011.The UDAC32 (compact and Hi-quality D/A converter) was awarded as "Pure Audio Grand-prix 2011" in 2011.Our digital audio products are many awarded and many evaluated, many people use regularly them.Our micro-computer and network application products are widely used by many company.High technology and quality to be reasonable is our motto.We will certainly comply with custom-made and OEM.