Much more than selling products, we build relationships based on a mutual love of music.
Recognition of the inherent musicality of GAS Audio's restorations has resulted in a variety of commissions to design the products showcased on this website. Bettinger Audio Design has been a logical business evolution of GAS Audio to design and produce these new designs.
Since the late 1970s, GAS Audio's restorations have provided a constant supply of classic audio components encompassing a wide range of circuit topologies. A passion for music and a curiosity as to design differences is at the core of the services we offer. 35+ years studying these designs has produced an understanding and an intuitive approach to the design and execution of analog audio circuitry.
The take-away from this work has shown that the performance and stability of an audio circuit is strongly affected by the electrical environment it functions in. While this is intuitive to most engineers, interactions between individual gain devices and the circuit layout are a bit of gray area. How a tube or transistor interacts with the surrounding circuitry or its ground/supply networks is also not as well defined in common practice. Our work has helped to define it.
Our studies have resulted in rules that allow us to delve into the intricacies of the various source and return loops for circuits, separating out biasing, signal and feedback paths, the return paths for filtering, and bypass applications. This information is used to inform the PCB layout process and physical characteristics of the routing and traces. The same guidelines are applied to the design of the chassis interconnection layouts, sheet metal and heatsink grounding.
The benefit of this approach to implementing a design is an inherent stability that is heard as a purity on vocals and strings and an overall lack of background texture. The dynamic response is fast but controlled, with a sense of composure and lack of congestion when the music becomes complex or demanding. Subtle details remain solidly intact in the presence of strong dynamic content.
Controlling the grounding, as in the design of the Arion phono preamp, has also proven beneficial in that even very high gain circuits are less prone to hum and RFI pickup; the fully implemented ground provides a solid ground reference for the phono input, enhancing the cartridge load's ability to properly control the arm and cartridge, improving the tracking and decreasing the sensitivity of the arm and cartridge to respond to low frequency feedback or mechanical resonance artifacts.
All of these factors combined equate to involving, neutral and natural musicality!