classe twenty five and classe fifteen

I used a DR-10 for several years, and replaced it with a CA-300. The 300 was a major improvement across the board. More detailed, more dynamic, and a more even tonal balance. In looking at the circuitry inside, I noticed the DR-10 had a coupling capacitor whereas the CA-300 was direct-coupled. The 300 also had a large number of small power supply capacitors and the 10 used a single pair of large caps. Classe mentioned the power supply changes in their literature at the time.