BOOOLE HIFI stereo AKM AK4399 chip decoder kit DAC

The product does not contain the chassis

AKM company's most high-end 32BIT 192K decoder chip, high index, and the very real nature of the sound, is used by many manufacturers of high-end products

SAN default main capacitor with capacitance Gold 35V4700, AD797 op amp patch or AD627, the active crystal .RCA not the kind of split the diagram, is soldered on the PCB (to borrow pictures for reference)). Kit needs its own welding

Kits contain transformers and chassis, part kit does not have USB, USB daughter card part is inserted, you can install PCM2706, TE7022, CM6631 3 ÖÖ card, arbitrarily choose one I2S mode access

Input interface supports optical, coaxial, USB

 

Now the main capacitor have better blue ELNA4700UF-35V can provide choice

Official LPF designed for fc = 125khz Q = 0.692 timbre extend good, rich in detail, but if you before and after class, then for high-definition style or a bit deserted. Cadogan a passive LPF, better results, I also add a level of passive circuit LPF re-export.

Enter receiving most classic WM8805, better than DIR9001 and 8416 targets and the sense of hearing

Double-sided PCB Immersion Gold plates, gold-plate lower internal resistance, better conductive properties. Standard US DALE resistor (DALE resistance section is a value close), the main capacitor SAN4700UF, German Red WIMA104 or ERO capacitance (feeling WIMA ERO than mildly) decoupling and the numbers are only used BC silver shell series capacitors and ELNA brown god (not the garbage ELNA blue robe)

LPF after repeated comparisons of various parameters designed and modify, LPF thin out the effect of high-frequency, intermediate frequency clear and sweet, low-permeability .LPF parameter circuit is very sensitive, making the bad words will be too bright, not Naiting and frizzy , it is appropriate to make an active approach is a passive LPF LPF +