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11-16-2007, 12:31 = PM =09 #1
diamondsouled =20

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Acrosound Archive

I have created a = yahoo group=20 specifically for archiving information on Acrosound products. Anyone = with=20 schematics, manuals, or whatever, if you could up-load what you have = to:http://tech.groups.yahoo.com/group/acrosound/?yguid=3D2= 00332169
=20 ... it would be greatly appreciated. I have made it a moderated = group to=20 eliminate spam so you will have to join to upload or download=20 information.
Any pictures or history would be appreciated as=20 well.

Thanks

Larry Rowe
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11-16-2007, 12:35 = PM =09 #2
hjames =20

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Hi Larry - Ok, I'll = bite -=20 what is Acrosound - some kind of regional product?

=20 Originally Posted by diamondsouled

I have created a yahoo group specifically for = archiving=20 information on Acrosound products. =

Thanks

Larry Rowe

2ch - Oppo981, JoLida502, AA DDE3 = DAC, UREI=20 809A, VonS VR4
HT7- XDA-2, BDP93, B&K amps, Vandy 3A, 2Ce, = VCC1,=20 TF600 & JBL 4641
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11-16-2007, 12:40 = PM =09 #3
speakerdave =20

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=20 Originally Posted by hjames

Hi Larry - Ok, I'll bite - what is Acrosound = - some=20 kind of regional product?
Outstanding = transformers=20 and power amps, the amps so collectible they've virtually = disappeared from=20 the market. Founded by David Hafler, who later went on the create = Dynaco. =20 OK?

Article on Hafler at Stereophile:

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

I = can't=20 find anything on the power amps, so maybe I'm misremembering. Back = in the=20 seventies (when you were still chasing butterflies, I 'spects) I had = a=20 beautiful little 6bq5 power amp (gold and pale green) which I = incautiously=20 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=20 before the auction could finish.

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

David

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11-16-2007, 12:50 = PM =09 #4
hjames =20

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Thanks Dave -
I = had a=20 friend with a Dynaco 400 amp but never knew the preceding gear's = story.

2ch - Oppo981, JoLida502, AA DDE3 = DAC, UREI=20 809A, VonS VR4
HT7- XDA-2, BDP93, B&K amps, Vandy 3A, 2Ce, = VCC1,=20 TF600 & JBL 4641
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11-16-2007, 01:06 = PM =09 #5
speakerdave =20

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=20 Originally Posted by hjames

Thanks Dave -
I had a friend with a = Dynaco 400 amp=20 but never knew the preceding gear's = story.
That=20 deservedly well-regarded amp was drawn by another audio legend, = James=20 Bongiorno, who later founded The Great American Sound Company = (Ampzilla et.=20 al.).

David
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11-16-2007, 04:27 = PM =09 #6
diamondsouled =20

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=20 Originally Posted by hjames

Hi Larry - Ok, I'll bite - what is Acrosound = - some=20 kind of regional product?
It was regional at = one=20 time, they were built in Philadelphia the home of Dynaco and many = other fine=20 audio products.

I own a pair of Ultralinear II monoblocks as = well as=20 a S1001 preamp.

Lar

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11-16-2007, 05:41 = PM =09 #7
speakerdave =20

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Nice--very nice. = Are they=20 EL34?
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11-16-2007, 06:01 = PM =09 #8
diamondsouled =20

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=20 Originally Posted by speakerdave

Nice--very nice. Are they=20 EL34?
They can run on either EL34s or = KT88-6550s.

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11-17-2007, 01:54 = PM =09 #9
10=20 Watt Street =20

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More literature at=20 hifilit.com

http://www.hifilit.com/hifilit/Acrosound/acrosound.htm<= /A>
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11-17-2007, 01:55 = PM =09 #10
diamondsouled =20

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=20 Originally Posted by speakerdave

Nice--very nice. Are they=20 EL34?
Here's the first page of the Sams = Photofact=20 which tells you how to rebias for KT88-6550: =

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11-17-2007, 10:19 = PM =09 #11
Hoerninger =20

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Based on = ACROSOUND:

http://www.jogis-roehrenbude.de/Leserbriefe/Jochen-Wank= miller-Acrosound/Acro_6-50.htm
=20 ___________
Peter
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11-18-2007, 12:37 = PM =09 #12
diamondsouled =20

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Nice amp = Peter!!

I've=20 become interested in using the 6SN7 as a driver tube.

Is the = design=20 based on David Hafler's Acrosound Ultralinear designs. What = transformers are=20 being used? I know that Sowter makes an Acrosound TO-350 remake = transformer=20 is that what is being used?

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

Cheers

Larry=
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11-18-2007, 01:04 = PM =09 #13
Hoerninger =20

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Larry,

it is = the work=20 of Jochen Wankmiller, he made his own transformers as far as I have=20 understood. I have no time for DIY right now.
http://www.jogis-roehrenbude.de/Leserbriefe/Jochen-Wank= miller-Acrosound/Acro_6-50.htm
Translation (Hope it = works)
__________
Peter
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