Abacus rieder 60-120 amplifier - diyAudio
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Old 16th September 2004, 04:10 PM   #1
ovy is offline ovy  Romania
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Default Abacus rieder 60-120 amplifier

What do you think about this amplifier handcrafted in Germany.
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Old 16th September 2004, 08:09 PM   #2
mikeks is offline mikeks  United Kingdom
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Where...? I can't see it...
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Old 18th September 2004, 05:44 PM   #3
ovy is offline ovy  Romania
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This question is for the owners of this amp.
Is rare german amp from '80, and in this year they make a new version.(www.ABACUS-electronics.com)
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Old 18th September 2004, 06:28 PM   #4
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Default Do you know where's the schematic?

I do not understand German.
Ich nichst lesen deutsch, wo ist der schematichen? (i can not read in german, where is the schematic?)

Sorry, Brazil only to be sold... top secret ultimate schematic, not to share...encapsulated VAS:
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Old 4th May 2011, 12:50 AM   #5
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Originally Posted by destroyer X View Post
I do not understand German.
Ich nichst lesen deutsch, wo ist der schematichen? (i can not read in german, where is the schematic?)
English: schematic diagram, German: Schaltplan/Stromlaufplan
here is the simplified schematic diagram:
and here additional URLs:

ABACUS electronics | ABACUS
I read:
ABACUS Schaltung: geheimnisvoll – aber nicht geheim
Die ABACUS-Schaltung mag zwar geheimnisvoll erscheinen, ist aber nicht geheim. Jeder der will bekommt bei ABACUS ein Schaltbild und Abgleichanleitung. Kostenlos! Bevorzugt als PDF, einfach per Email oder auf der ABACUS Homepage unter Downloads. Und wer sich daheim in der Bastelstube für den Eigenbedarf selbst einen ABACUS zusammenlöten möchte, mag das gerne tun; ABACUS hilft.
in english:

ABACUS topology: secretive, but not confidential
the ABACUS circuit may seem mysterious, but isn't confidential. Each user can order (without costs !) the schematic and adjustment instructions. Preferred as PDF attachement, send inquiry per e-mail. Anyone DIYer who would like to solder, will get appropriate support.

Last edited by tiefbassuebertr; 4th May 2011 at 01:04 AM.
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Old 25th February 2015, 11:04 PM   #6
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The technology was described in Rieder's 3 pages article in Funkschau (german mag.) in 1986, #2.
The truth is out there. Who can handle the truth?
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Old 26th February 2015, 05:43 AM   #7
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Location: Smoky Mountains , Tennessee
Default No magic here ...

Looks like some forum amps.
OP-amp driven small discrete OPS.

Nowhere in the same range as the mack's/ H/K/ accuphase/ pass
offerings (below).

More "fluff" (marketing magic).
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