Blast from the past ……. Iskra EK2304 Cinema Monoblocks – rejuvenation

Some text goes here ……. later


I’ll enclose schematics – as it was and as it is now

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Some shameful FW and PL clonning – First Watt M2 and Pass Labs XA60.5 …….. by Mighty Zen Mod

I’m not,by principle,making Papa’s amps for money , neither public (First Watt) nor non public (or not exactly public) Pass Labs .

What I’m doing occasionally ,money involved, is :

-making my Babelfish amps for someone ,where Babelfish being a term for my iteration/anticipated version of Papa’s , born in time when Papa’s FW circuit still wasn’t published ; (when having more time/space , I’m explaining Babelfish series as unnecessary complicated iteration of Papa’s circuit 😉  )

-lending my hands and experience to someone making First Watt but ,being novice , not exactly being able/sure how to do it ; in most cases I already participated with few advices regarding needed hardware for amp in question,then I’m taking in when all hardware he collected needs some Voodoo to became whole.

However , when money is not involved , just friendship, I’m little more relaxed regarding Papa’s IP.

I have a close friend , in some circles known as SuperFi , in other circles simply known as Igor;he is DIY person too , but due to work mostly and constantly lacking in free time department . So , when I made my own  Papa’s Koan M2 , he was (naturally) interested, having not just adequate speakers (Sonido 8″ FR in big horn ) but also some needed hardware.

Result is shown in next gallery ; construction was dictated by heatsinking layout ; base metal case made with help of our friend Stein (few mistakes , mostly drill size ,as usual are result of long command chain 😉 ) , top assembly made by Igor’s carpenter …. still missing Al rhomboidal net in top holes and missing decent front plate, then some feet.

I’m responsible for most part of concept , then drilling , tapping , and everything else ….

Btw. , these were finished more than year ago .

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Our Simovich Junior , Matija . Inhalt , some important news , interview .


Interview :

Picture taken from there ……..

This one taken by me , 2011. ….. proud Papa Vladimir was somewhere around ……..




Treshold Treasure …… while Papa was there : FET 9


Download files :

FET9 Service Manual

FET9e Gain Adjustment

FET9e Load Adjustment

FET9 Operating Manual FAK 2015 – Festival Audio Konstruktora – Audio Constructor’s Festival ; part 3

Few pictures by ZM

Vids by InSides , last one by ZM