There are tens of thousands of the original Dynaco tube amplifiers still in use around the world.  The original Dynaco Stereo 70 is a true classic that is still regarded with awe by audio enthusiasts worldwide.  The ST70 Series 3 marks the introduction of a third generation of vacuum tube products bearing the Dynaco's involvement with vacuum tube designs as well as the latest advances in vacuum tube technology.  We like to think of the Series 3 as the update that David Hafler would have made if he were alive today.

Through its long history, the Stereo 70 has proven to be a robust, reliable design of exceptional value.  The updated amplifier is follows the design of the original 70: The same tried-and true EL34 and 6CA7 tubes are used, the Pentode-Triode gain circuitry is virtually the same as the original, keeping the signal path as short as practical, and low open-loop gain architecture is maintained in an effort to minimize Transient Intermodulation Distortion (TIM, which is widely regarded as the type of distortion to which the ear is most sensitive.