Optimus STA-3500 mod question

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
This is a good mid-grade tuner/amp,
but I have two complaints:

1)
I don't like the tone stack, and I wish to modify it,
but I can't seem to find a Fotofact or mfg man on
this unit. The clowns at Radio Shack offered me
a "user's manual". How droll.

2)
There is no preamp to power amp breakout,
else, I'd just pull the jumpers, and slap in a
parametric equalizer.


This is a VERY GOOD bipolar tuner/amp, save the
black-on-black lettering (making it impossible
to see under low ambient light), and the pitiful
tone stack.

About the stack:
I want to convert it to a James stack, but
I quit reverse engineering, over 20 years ago.
I rev'eng'd as a hobby - but not out of necessity.
However, I'm glad I did, because I learned a lot.
But to bin this unit? WHY? It still works, and
It works well. It sounds good, with the bass and
treble set flat (or at least to the center indent).

I have an older unit, too, that does have
back-panel breakouts for preamp out / amp in.
Maybe I'll dust it off, and see if it works.

I said all that, in order to ask this:
If anyone has service literature and/or a schematic
or Fotofact on this unit, please post back here, and
feel free to email me. This model is discontinued,
and I want to save it from the landfill. Vintage audio
equipment doesn't belong there. The quality
(or lack thereof) of consumer electronics today only
underlines my point.
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.