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Dynaco Releases New ST-70 Series 3 Tube Amplifier

Built on the design of the original Stereo 70, the newest model provides 35 watts per channel with Class-A push-pull stereo topography.

By PSW Staff April 30, 2018

Dynaco (a division of Radial Engineering) announce the ST-70 Series 3 tube amplifier is now shipping.

The ST-70 builds upon the proven design philosophies of the original David Hafler-designed Stereo 70, with contemporary design techniques resulting in performance improvements that meet the requirements of modern audiophiles. The ST-70 provides 35 watts per channel and is switchable between both 4 and 8 Ohm outputs, with Class-A push-pull stereo topography.

This latest rendition has seen a substantially overhauled power supply from the original version, employing a larger dual-primary power transformer with improved line regulation, increased filter capacitance, and a solid-state rectifier that results in a much more articulate response.

The redesigned front end of the Series 3 amplifier replaces the obsolete 7199 pentode signal tubes from the original Stereo 70 with more commonly-used 12AU7 dual-triode tubes, while the output stage and EL34/6CA7 output tubes retain the same elements as the original Stereo 70. A set of front-panel recessed trimmers has been provided, allowing the bias adjustment to be fine-tuned for each output tube.

Building on the legacy of David Hafler’s Stereo 70, the new Dynaco ST-70 incorporates advancements in component quality, improvements to the electronic circuit performance, and an all-new exterior design.

MSRP: $2,999.99 USD


Radial Engineering

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