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Dynaco Ships ST-70 Series 3 Tube Amplifier

Radial Engineering division Dynaco ships its new tube amplifier.

Vancouver, Canada (May 1, 2018)—The ST-70 Series 3 tube amplifier from Dynaco is now shipping.

Taking inspiration and some design aspects from the original David Hafler-designed Stereo 70, the ST-70 adds contemporary design techniques as provides 35 watts per channel. The unit is switchable between both 4 and 8 Ohm outputs, with Class-A push-pull stereo topography.

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The tube amplifiers sports an updated power supply as compared to the original version, employing a larger dual-primary power transformer with reportedly improved line regulation, increased filter capacitance and a solid-state rectifier.

Taking a cue from the original Stereo 70, the ST-70’s front end replaces the obsolete 7199 pentode signal tubes with 12AU7 dual-triode tubes, while the output stage and EL34/6CA7 output tubes retain the same elements as the original Stereo 70.

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A set of front-panel recessed trimmers has been provided, allowing the bias adjustment to be fine-tuned for each output tube.

The ST-70 has a MSRP of $2,999.99 USD.

Radial Engineering Ltd. •

Hafler-Dynaco •