Gain
Single
Channel
Block
Diagram
RIAA Equalisation
Input Stage
PCB Layout
Earth
Isolation
With a gain range of +40dB to +73dB, the SXV1 is incredibly sensitive. Working in combination with the wide selection of R and C loading the user has no need for messy MM/MC jumpers as any type of cartridge can be matched via the external selectable DIP switch settings.
The RIAA uses robust equalization architecture with high precision, low noise resistors and highly linear metalised polyester capacitors for optimum signal transfer. RIAA deviation is ±0.5dB,
Perreaux have utilised the CA3046 transistor array package. The main advantage of this device is that it features highly accurate gain matching on account of the reason that the transistors all share the same silicon substrate. The CA3046 device provides a low noise but highly sensitive interface between cartridge and the RIAA EQ section. Coupled with accurate current mirroring circuitry and stable current sources, the circuit topology works in combination to make for sonic transparency.
Special attention has been lavished on the PCB layout. The unit is symmetrical in design (note the DIP switch numbers, they are a mirror of each other, and the input/output RCA configuration), with each channel being isolated from the other. The super clean custom designed power supply is physically segregated from the rest of the sensitive electronics.
Special attention has been paid to ground planes to maintain sonic purity. All signal grounding is isolated from mains earth.
18
