: 15Hz Subsonic filter and 10kHz High filter (both 12dB/oct).
A "BETTER" manual usually implies a high-resolution scan, often sourced directly from an original factory print rather than a degraded technician's copy. For the CA-R1, this distinction is critical. The schematic diagrams for the R-1 series are dense, tracking signal paths through intricate tone control circuits and sophisticated DC offset protection logic. In a standard scan, the fine lines of the circuit traces merge into a block of black ink. In the "BETTER" version, the lines are distinct, allowing the modern technician to trace the signal with the same clarity the original engineer possessed in 1983. Yamaha Ca-r1 Service Manual BETTER
Without a BETTER manual, you are flying blind. With it, common issues like: : 15Hz Subsonic filter and 10kHz High filter (both 12dB/oct)