John Bowers Active One HELP

Archived from groups: rec.audio.tech (More info?)

Hello,
I recently acquired a pair of John Bowers Active Ones,
serial number 359 and 360. Made in 1985.
They have an internal 300W Mosfet amp.
So I get them home, plug them in, run an RCA jack from
my preamp and get nothing - no sound at all.
One the back, they both have one small red light, and one small green
light, both are on.
When I first turn them on just the red light is on, then I turn it off,
turn it back on a litle bit later, and they are both on.

1) I open the case and look at the amp boards and it looks like the
preamp board (tone control I guess) has a small black smoky looking
spot, so I'm assuming it's fried?

2) The power supply says 220V, and it was sold originally in Germany,
could it be a power supply problem? Could US power have fried the amp?
It uses a computer style three prong AC cord.

I ran the speaker connectors out the back and through an external
crossover and all the drivers are working perfectly and sound great
with my tube amp so it's not a problem with the drivers.
All the fuses are fine.

Any help or suggestions would be greatly appreciated.


Thanks,
Mike

Archived from groups: rec.audio.tech (More info?)

I think you might have mistook my plain old fashioned ignorance for
"carefully avoiding important information."

I ran a three prong AC cord from the wall sockt of my USA home into the
speakers,
and they powered up. This is how I usually feed things with powers,
from
the magic electricity that flows from my walls.
I don't know much about power supply, and don't use any fancy external
line condiitioners, adaptors, etc.

I would not even be asking the question if I could find some
information on these
speakers, but I don't think many were made, and there is scarce little
info online
about them, I was hoping someone who owns or owned a pair could shed
some
light on the red and green lights on the back,
red meaning stop and green meaning go - I'm a little confused.
I can just insert a crossover and enjoy the speakers without the amps,
so all is not lost.
Thanks,
Mike

Archived from groups: rec.audio.tech (More info?)

<mike@dlowracing.org> wrote in message
news:1113681115.183595.161880@l41g2000cwc.googlegroups.com...
>I think you might have mistook my plain old fashioned ignorance for
> "carefully avoiding important information."
>
> I ran a three prong AC cord from the wall sockt of my USA home into the
> speakers,
> and they powered up. This is how I usually feed things with powers,
> from
> the magic electricity that flows from my walls.
> I don't know much about power supply, and don't use any fancy external
> line condiitioners, adaptors, etc.

Just as well you are not in a 220v country plugging in a 110v device - then
the black smokey bit may be substantially bigger.

geoff