J'ai prévu de changer en premier les AOP BB2604 par des burson qui semblent faire l'unanimité.
Après je ne sais pas trop quoi changer, certains condos, diodes, ajouter des plaques de bitume... ??
J'espères que les spécialistes du tweak auront quelques suggestions !
Le DAC à 3 sorties :
- RCA à tube
- RCA sans tube
si j'ai tout compris :
- BB2604 + BB134P pour la sortie XLR
- BB2604 pour la sortie RCA
- BB2604 + 1 tube e88cc pour la deuxième sortie RCA.
The analog filter circuit adopts the low-noise non-inductive resistor and the operational amplifier IC 0PA2604 from BB company. The analog output is divided into tube output and operational amplifier output, the former one is RCA single-ended output, and the latter is balanced output. The basic structure of electronic circuit is classical, it can up-sampling the digital signal recorded in common CD player and PCM format to achieve higher D/A converting precision and highly improve the sound performance on dynamics, frequency extension and solution. Except that, DAC-5 also has its own characteristics on processing of the electronic circuit, such as ¡°adopting the patent technology of avoiding dynamic invalidation of capacitors¡±. In the introduction, it is said that technology could decrease the distortion of the high frequency and improve the sound performance. Though there is no more detailed introduction on that, but one point is confirmed that capacitors could influence the sound of Hi-Fi products, no matter under dynamic invalidation or static invalidation. On such invalidation, it is meaningful to control and prevent timely. It is well known about the advantages of adopting two separate transformers supply the power to different channel. This DAC-5 adopts two separate toroidal transformers for right and left channel separately. In addition, there are 6 groups independent positive voltage regulators for power supply and there are 5 piece of high precision integrating regulator IC in total. That could assure the purity and steady of the power supply, which is also useful for block and converting electronic circuit, in order to further ensure the good quality of sound. The tube output adopts E88CC(6922EH), and the balance output adopts operational amplifier IC OPAl34PA.
les photos arrivent...