Rare Modwright Signature Level 2 modified Perpetual Technologies P3A DAC
In good cosmetic and working order.
P3A has Toslink, Coax, AES/EBU and I2S inputs.
Signature level II mods:
1. a minor circuit change and an upgrade of the digital coupling capacitors
2. power-supply rectifier diodes replaced with ultrafast soft-recovery diodes (Harris FREDs), lowering switching noise
3. surface-mount digital input resistor replaced with a 1% metal-film Caddock resistor
4. analog filter-stage capacitors upgraded
5. four Burr-Brown OPA-134 op-amps ($1.50 each) replaced with Burr-Brown OPA-627s ($14 each)
6. coupling capacitors upgraded
7. analog signal-path resistors upgraded to Caddock and Vishay 1% metal-film types
6. WBT RCA output jacks