Mass-market consumer electronics put a primary focus on price and the bottom-line. Consequently there's no budget left for quality parts.  

The 12dAX7 focuses on maximizing sound quality - using the best available component parts: 
 

A cold rolled steel chassis provides the foundation for the 12dAx7 - furnishing a rigid, non-resonant platform for circuit boards. Durable powder coating provides an attractive long-term finish.

High strength FR-4 fiberglass circuit boards support all circuitry - as opposed to flimsy phenolic substrates found in typical consumer electronics.

The modular architecture integrates:
- A power supply circuit board.
- The Digital-to-Analog converter module.
- Two vacuum tube gain modules

Dale brand 1% metal film resistors and Wima brand polypropylene film capacitors enhance the signal path a first choice among audiophile level, high-end designers.

As in the very best high-end preamplifiers, the 12dAX7 uses a torroidal power transformer. Although more expensive than conventional E-I transformers, torroidals radiate extremely small magnetic and electrical fields and in turn maximize sound purity in the 12dAX7.

Top quality Russian made 12AX7 tubes are used for performance and reliability.