Oberheim Matrix 6 (and fixes)

Harry Bissell harrybissell at prodigy.net
Mon Nov 29 07:41:58 CET 1999


Thanks for the correction... I'm corrected now.
:^) Harry (Ok I'll take an Xpander and an M12)

Tony Clark wrote:

>    Um, as far as I know, the M6 and M12 are NOT the same.  The only thing
> that they share are the basic name, but the M12 is definately 2 Xpanders
> with a keyboard.  That's why they (M12/Xpander) sell for astronomical
> prices and why the M6/M1000 are quite affordable.
>
>    Tony
>
> ------------------------------------,----------------------------------
> I can't drive (my Moog) 55!         |     The E-Music DIY Archive
> ------------------------------------|
> Tony Clark -- clark at andrews.edu     | aupe.phys.andrews.edu/diy_archive
> http://aupe.phys.andrews.edu/~clark |     Contributions welcomed!
> ------------------------------------'----------------------------------
>
> On Sun, 28 Nov 1999, Harry Bissell wrote:
>
> > The Matrix 6 and 12 are the same or very similar. The Xpander is a very different
> > beast with 15 or so filter modes etc. Though I have heard that the Xpanders env
> > gens were a little slow...
> >
> > I wanted the Xpander but couldn't afford it. I've had the Matrix 6 and it was
> > good sounding, but tended to go off into the weeds on power problems. If it was
> > for live use I'd get an uninteruptable power supply for it.
> >
> > The problem is the memory voltage system... the processor runs on 5V but the
> > memory is a diode drop below (4.3V) so as the voltage goes down there is a good
> > chance the memory will get corrupt before the processor knows its time to go
> > "nitenite".
> >
> > A simple improvement is to use a low drop shottkey diode (In5817) which have a
> > much lower forward drop (at the expense of higher rebverse leakage at high
> > temps...) so the memory gets about 4.7 volts...
> >
> > The Right FIX is to boost the 5V supply to 5.7 volts (usually a diode added to
> > the voltage reg will do this, then add a diode in series with the out of the
> > regulator to drop the volts back to 5V. Then add a similar diode to supply the
> > memory. This way while running the supplies are both 5V and the memory backup
> > voltage is isolated. Why didn't they do this at the factory I'll never know...
> > its only two more diodes...
> > This is major surgery... not for the faint of heart. I did the easy mod above and
> > it made an 80% improvement.
> >
> > I have the Matrix 1000... Its great and never flaked out. With software you can
> > edit it... or load programs from a Matrix 6.  I'd go for this one !!!
> >
> > :^) Harry
> >
> >
> > Hallgeir Helland wrote:
> >
> > > Rob wrote:
> > > >
> > > > Both sound really good though. Matrix 6 goes for about 450, and the matrix
> > > > 1000s are still being sold in limited quantities last time I tried to get
> > > > one.. they go for about 300-400 used.. I will eventually get off of my duff
> > > > and get one.
> > >
> > > Hi,
> > >
> > > Does the Matrix 6 do the same (and sound the same) as
> > > the Matrix 12 and the Xpander? If so, I'm getting mine!
> > >
> > > thanks,
> > > Hallgeir
> > >
> > > btw: any Lowther owners onlist?
> > >
> > > --
> > > .,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.,.
> > >  Hallgeir Helland   hhelland at mailandnews.com
> > >     Evlogia          http://fly.to/evlogia
> > > '¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'¨'
> >




More information about the Synth-diy mailing list