Dynaco
ST-70
Introduced 1959$100 MSRP
The best-selling tube power amplifier of all time, sold largely as a kit with EL34 push-pull output and David Hafler's ultralinear circuit. Original units run $650-950; restored or upgraded examples reach $1,000-1,400.
MSRP
$100
Used market · Very Good
$850
+750% vs MSRP
as of Aug 15, 2026MSRP to used market
From $100 at launch to $850 today.
Specifications
- Type
- tube power amp
- Inputs
- RCA line-level
- Outputs
- 4/8/16 ohm speaker taps
- Topology
- EL34 push-pull, ultralinear
- Weight
- 32 lbs
- THD
- 1%
- Power output
- 35 watts per channel
Active listings (0)
No active listings for this component right now.
Similar but better
Matched by the Audiophilia engine on character, specs and market position.
Step up
Marantz · power-amplifiers
Model 8B
$4,100$249
- A step up in the same category
Bryston · power-amplifiers
4B ST
$1,500est.$2,395
- A step up in the same category
BorderPatrol · power-amplifiers
P21 EXD
$8,500est.$14,450
- A step up in the same category
Phase Linear · power-amplifiers
700B
$1,200$899
- A step up in the same category
