Even today it is rightly believed that the use of tubes in sound reproduction equipment is synonymous with high fidelity. The technology based on valves, even if now dated, continues to guarantee the reproduction of those warm and defined sounds, very close to the reality that no expert ear wants to give up. It is also believed that semiconductor devices, which are smaller, more compact and very cheap, do not have the same sound quality. But this was true until yesterday.

Now ACUS Sound Engineering has created a circuit based on semiconductor components that makes all the secrets of thermionic tubes its own, but in a very reduced space and cost.

TSF (Tone Sound Feeling) was born. It is a great innovation. For the first time, the maximum fidelity in the reproduction of musical sounds is achieved with semiconductor devices.