passive analog summing
image to view larger
from the seeress series - complete
.\\\\' DESCRIPTION '///////////////////////////////.
this is a compact four channel passive analog
mono mixer with mutes and volume controls for each
channel along with a master volume control. it can
be used to process either audio or control voltages
and it can be used backwards as a splitter. this
passive design does not impart any "color" or
filtering of any kind and yes
you can use this as an analog summing buss with your
computer or other setup. being passive means that it
does not require a power source but because of that
it may require a slight amplification after the main
output to bring it back to up the desired level. measuring
it during line level audio use showed a
nearly 20db drop in volume.
all pcbs have been hand printed by alex of getlofi – designed, cut and drilled by me
.\\\\\\' COLORS '//////////////////////////////.
gray/ white/ black/ blue
gray/ black/ red/ orange ( black base coat crackled )
red/ blue/ pink/ purple ( purple crackled )
blue/ yellow/ white/ green ( blue and yellow edges bled a little )
.\\\\' CONTROLS '///////////////////////////////.
channel attenuators: reading
from left to right are the 4 input volume controls
mutes: diagonal up and
to the right is each channel's mute switch
far right knob is the main output volume
i/o jacks: each
jack is in line with it's knob
.\\\\' DETAILS '///////////////////////////////.
each one is handmade
- and numbered internally
- dimensions - 4.3 in. x 2.3 in.
case is powder coated
graphics | imperfect spray painted stencils | poly coated | baked for scratch
four ¼” input
jacks ( mono ) - one ¼” output
jack ( mono )
- covering both parts and labor | not finish
please feel free to contact me
if you have any questions or visit the forum here