Nattawut Uamkruea, blogger and audio gear maker who passionate in vacuum tube, audio & music.
Producing electronics projects since high school. Seriously upgrade and modify vintage audio equipment for “Real Sound” concept.
He is a co-founder of Soundaries and Sentimental Studio, all audio solution provider.
Experienced and lively explore the listening rooms & audio shops in Japan as his most favorite to do.

Tuesday, March 8, 2016

JBL Solid State Energizer

I've got these 2 JBL power amplifiers for modification, SE408S and SE400E.

SE408S was design to use with JBL Paragon and use same circuit like SE400S.

But SE400E has less information than others.

After open SE400E, components and circuit inside is the same as SE401.

So I understand clearer about model of JBL power amplifiers.

SE400S = SE408S = SE460 (Silicon Transistor)

SE400 = SE400E = SE401 (Germanium Transistor)

And Germanium version using interstage transformers !!!

This card indicate that using for D50S8R Olympus.

Will check all coupling capacitors and resistors, bring vintage tone back here.

To be continue ...

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