The CD15 was 500.00 The only reason I donot use an outboard digital to analog converter is because I've never hooked it up. the Larrt sent me some Audio Alchemy DAC and Anti Jitters , just haven't got around to hooking them up. Like Scott (dingus) said, almost any decent CD player has an adequate transport, the daily miracles occur in the DAC, and the ADC. Your CAL probably has a good enough transport. Does it have a digital out jack?? There are some very good outboard dac's. Google Perpetual Tech, Audio Alchemy, , and maybe Joe will put his 2 centavos worth in.