DF-75

About the DF-75

The Accuphase DF-75 is a fifth-generation digital frequency dividing network designed for multi-amplifier audio systems. It features high-speed 64-bit floating-point DSP processing that enables precise signal separation across multiple frequency bands. The unit supports standard 4-way system configurations and can be configured for monophonic operation. With 3,101 selectable cutoff frequency points (expanded from 59 in the previous DF-65 model), the DF-75 offers exceptional flexibility for system tuning. The device achieves steep 96 dB/octave attenuation slopes for clean signal separation between drivers. An integrated time alignment function allows delay adjustment in 0.5-cm steps, while an automatic delay compensator corrects for any timing errors introduced by the filter circuits. The analog signal path features advanced A/D and D/A conversion circuits with Accuphase's ANCC (Noise and Distortion Cancelling Circuit) technology, ensuring minimal signal degradation. All signal processing functions including phase, delay, and level control are implemented in the digital domain for temperature-stable, aging-resistant performance.