- High performance; H-DAC + H-Filter system performance measured with fixed resistors:
- SNR: 119 dB (A-weighted)
- THD+N ratio (1 kHz / 2 Vrms): -100 dB
- Crosstalk: -112 dB at 1 kHz, -100 dB at 10 kHz
- I/V-stage, filters, output stage, and opamps implemented with through-hole components for easy experimentations
- Balanced outputs (XLR) on-board, uses unbalanced connectors (RCA) on H-DAC board
- Potentiometer for volume control to transform H-DAC into preamplifier, or resistors for fixed output level
- Takes voltage supplies and audio signals directly from H-DAC via pinheaders
- 5×10 cm 2-layer PCB, through hole resistors and capacitors, placeholders for DIP8 sockets for opamps
Addon H-Filter is a simple filter and output addon for H-DAC with a possibility for a potentiometer to transform H-DAC into a preamplifier. In contrast with other designs of mine, it has been designed with through-hole components to allow easy experimentations with opamps and passive components. It offers high performance with low BOM cost and easy solderability.