New Dynaco ST-70 Series 3 amp finally released for sale!

[joeinid]

http://www.dynaco.audio/#scroll-home

The Dynaco ST-70 Series 3 tube amplifier is 35 watts per channel and switchable between both 4 and 8 Ohm outputs, with Class-A push-pull stereo topography, that has long been characterized as a robust, reliable design of exceptional value.The ST-70 Series 3 builds upon the proven design philosophies of the original David Hafler-designed Stereo 70, with contemporary design techniques resulting in exceptional performance improvements that meet the requirements of modern audiophiles.Dynaco engineers have made extensive use of high-quality parts that were unavailable at the time of the original design including precision metal-film resistors, poly-composition capacitors, and miniaturized high-capacity power supply electrolytic capacitors. In addition, many of the newer parts are also built to tighter specifications than the originals.

 

[Mr Peabody]

I can't access the link from work. I wonder just who Dynaco is currently? I remember some Canadian company used to own the Hafler name and putting out some current product.

 

[joeinid]

http://www.dynaco.audio/#scroll-home

 

[puroagave]

http://www.dynaco.audio/#scroll-home

its on sale too, half off! whets stopping you Joe

 

[mep]

its on sale too, half off! whets stopping you Joe

The only thing that looks similar on this new ST-70 MK1000 is the power and output transformers, but I'm sure the similarity there is only skin deep as well. The input circuit doesn't use the original tubes and no more tube rectifier. That was all part of the original sound.

 

[Peter Breuninger]

I would go for an original. Remember my review in Listener?

 

[joeinid]

its on sale too, half off! whets stopping you Joe

 

[kevinkwann]

I would go for an original. Remember my review in Listener?

Are you referring to The Listener magazine established by the BBC in 1929? Geez, I was only 16 at the time. Who can remember that far back? I had enough trouble getting through the '29 stock market crash.

 

[Mikado463]

strange add ........the 'description' states Class A whereas the ' technical specs' say 'AB' ....... ??

 

[mep]

strange add ........the 'description' states Class A whereas the ' technical specs' say 'AB' ....... ??

It's supposed to be a Class A/B amp. You can't get a pair of EL-34s to give you 35 watts of pure Class A power.

 

[Mikado463]

It's supposed to be a Class A/B amp. You can't get a pair of EL-34s to give you 35 watts of pure Class A power.

gotcha, understood, I was pointing out the add being misleading..........

 

[CPP]

It's supposed to be a Class A/B amp. You can't get a pair of EL-34s to give you 35 watts of pure Class A power.

On the Dynaco website notes Class AB. That Class A note was in the Absolute Sound article or comment. More from the lead designer is here http://dynaco.com/inside-story

 

[Mikado463]

On the Dynaco website notes Class AB. That Class A note was in the Absolute Sound article or comment.

here's where I saw it, you decide where it's from ............

http://www.dynaco.audio/#scroll-home

 

[CPP]

here's where I saw it, you decide where it's from ............

http://www.dynaco.audio/#scroll-home

Looks like its a add from Rutherford Audio.

If you try to pay for it, this is what a person will see at the buy area. Interesting . I wrote Dynaco and asked them what is it, AB or A.

 

[puroagave]

It's supposed to be a Class A/B amp. You can't get a pair of EL-34s to give you 35 watts of pure Class A power.

that's 'my thought too, I also understand a pentode (EL34) can only be wired as pseudo triode.

 

[mep]

that's 'my thought too, I also understand a pentode (EL34) can only be wired as pseudo triode.

You are tying a grid to the plate so it's never a "real" triode.

 

[CPP]

An update from Dynaco

Hello Chris,

Thank you for your interest in Dynaco.

The ST-70 Series 3 is a high bias Class AB amplifier. In effect, it operates in Class A up to about 10W then AB above that point.

Regards,
Ryan

Ryan Juchnowski –

Radial Engineering Ltd.

 

[mcanaday]

What would be likely speakers to pair with this amp?

What would be a good match in terms of pre-amp?

 

[Mr Peabody]

What would your budget be? Plenty of options, although I'd use some efficient speakers, I play loud sometimes.

Then again, this isn't the Dynaco of old, so unless someone had this amp or had a good listen, we'd be guessing.

What would be likely speakers to pair with this amp?

What would be a good match in terms of pre-amp?

 

[joeinid]

For speakers, try and stay above 90 dB efficient but if you don’t play loud, certainly very high 80’s efficiency will be fine.

Do you have any speakers in mind? Let’s hear about what you are thinking.