just gutted the guts of a Yamaha PM1000 channel strip. I will try
to rack them in a standard 19" rack case. I'll be adding a custom
power supply, and the usual XLR/TRS input and output jacks, phase,
phantom switch, filter cutoff low-pass, hi-pass, etc...
So far, I'm successful in my testing after ripping and soldering
everything together and adding a few modifications (i.e. using simple
DPDT switches instead of 3Pole selector switches).
The Yamaha PM1000 are usually called Japanese "Neves" because
of a similar approach in design. Just like the Neves, this is all
discrete transistor and uses an input transformer and output transformer.
The EQ section is especially sweet because there is not a single
IC on this preamp. The EQ section uses inductors and capacitors...
totally analog manipulation and shaping of your frequency. (circa
I've tested them on drums and vocals and they really make the sound
FAT. The EQ section shapes your sound anywhere from slight barely
noticeable to extreme gain/reduction. Bass frequencies are solid.
Of course, being an analog EQ, it is not as precise in shaping the
sound as IC chip Equalizers. But the curve is smoother I would think.
This is what a PM1000 mixer looks like (circa 1975). Note, I did not
use my fully operational 16 channel vintage mixer for this project.
I have a few (8) spare PM1000 modules I got from eBay. I also have
2 master strips.