Acrosound Archive

[diamondsouled]

I have created a yahoo group specifically for archiving information on Acrosound products. Anyone with schematics, manuals, or whatever, if you could up-load what you have to:http://tech.groups.yahoo.com/group/a...guid=200332169
... it would be greatly appreciated. I have made it a moderated group to eliminate spam so you will have to join to upload or download information.
Any pictures or history would be appreciated as well.


Thanks



Larry Rowe

[hjames]

Hi Larry - Ok, I'll bite - what is Acrosound - some kind of regional product?

I have created a yahoo group specifically for archiving information on Acrosound products.



Thanks



Larry Rowe

[speakerdave]

Hi Larry - Ok, I'll bite - what is Acrosound - some kind of regional product?

Outstanding transformers and power amps, the amps so collectible they've virtually disappeared from the market. Founded by David Hafler, who later went on the create Dynaco. OK?

Article on Hafler at Stereophile:

http://www.stereophile.com/news/11661/

I can't find anything on the power amps, so maybe I'm misremembering. Back in the seventies (when you were still chasing butterflies, I 'spects) I had a beautiful little 6bq5 power amp (gold and pale green) which I incautiously resold; it seems to me it was Acrosound. I also seem to remember an Acrosound power amp cropping up on ebay a while ago; I think it disappeared before the auction could finish.

Yes. It was the Acrosound 20-20. Here's a bad photo cribbed from the internet of one that looks beat and bowdlerized; one of the output tranformers had been replaced with something else:



David

[hjames]

Thanks Dave -
I had a friend with a Dynaco 400 amp but never knew the preceding gear's story.

[speakerdave]

Thanks Dave -
I had a friend with a Dynaco 400 amp but never knew the preceding gear's story.

That deservedly well-regarded amp was drawn by another audio legend, James Bongiorno, who later founded The Great American Sound Company (Ampzilla et. al.).

David

[diamondsouled]

Hi Larry - Ok, I'll bite - what is Acrosound - some kind of regional product?

It was regional at one time, they were built in Philadelphia the home of Dynaco and many other fine audio products.

I own a pair of Ultralinear II monoblocks as well as a S1001 preamp.

Lar

[speakerdave]

Nice--very nice. Are they EL34?

[diamondsouled]

Nice--very nice. Are they EL34?

They can run on either EL34s or KT88-6550s.

[10 Watt Street]

More literature at hifilit.com

http://www.hifilit.com/hifilit/Acrosound/acrosound.htm

[diamondsouled]

Nice--very nice. Are they EL34?

Here's the first page of the Sams Photofact which tells you how to rebias for KT88-6550:

[Hoerninger]

Based on ACROSOUND:



http://www.jogis-roehrenbude.de/Lese.../Acro_6-50.htm
___________
Peter

[diamondsouled]

Nice amp Peter!!

I've become interested in using the 6SN7 as a driver tube.

Is the design based on David Hafler's Acrosound Ultralinear designs. What transformers are being used? I know that Sowter makes an Acrosound TO-350 remake transformer is that what is being used?

http://www.sowter.co.uk/

Cheers

Larry

[Hoerninger]

Larry,

it is the work of Jochen Wankmiller, he made his own transformers as far as I have understood. I have no time for DIY right now.
http://www.jogis-roehrenbude.de/Lese.../Acro_6-50.htm
Translation (Hope it works)
__________
Peter