A new paradigm for audio amplification
It’s not every day you see a step-change in performance, especially when that performance is in a highly developed field. Yet that is exactly what the Siltech SAGA amplification system represents. How can a company best known for high-res cables produce a genuinely revolutionary high-end amplifier? Actually – that’s the secret. With cables you are dealing with the tiniest signals and musical details: it teaches you respect for system resolution and that concern is behind the concept of the SAGA system.
The C1 control unit is an ultra low-noise line stage with an unprecedented noise floor, despite the fact that it employs vacuum tubes. A key part of that performance is the unit’s gain structure. The C1 barely attenuates incoming signals and so minimizes the amount of gain required and the residual noise added to the signal – a simple but incredibly effective solution.
Elimination Of AC Circuitry
The biggest source of self-noise in a conventional amplifier is the AC supply, both the incoming signal itself and the massive transformers and power supply components necessary to handle it. Siltech eliminated this problem by making the line-stage and separate V1 voltage gain stage battery powered, using sophisticated rechargeable cells to drive specially selected low-noise tubes. The results combine the remarkably linear voltage gain of vacuum tubes with the ghostly quiet background of a pure DC supply.
The Apollo Light Drive
Batteries are simply not capable of delivering sufficient current for a genuinely powerful and load-tolerant amplifier – both critical contributors to maintaining dynamic range and headroom. But a conventional AC supply was deemed unacceptable due to the problems of associated noise and AC pollution. Siltech’s solution was typically innovative and bold: the Apollo Light Drive. An incredibly powerful light source is used to drive a photo-electric cell, that generates DC for the amplifier’s output stage – galvanically isolating and totally decoupling the current gain stage from the AC supply. Conceptually simple the engineering involved was extremely challenging but the results are revelatory.