Latest addition (and last) to my "stack of Mc". Had wanted one of these for some time - had to move the CR7 and CD player to a side table so the main rack is a tower of black glass (except for the power controller).
Purchased from Audio Classics it's in great condition.
Very handy tool for multipath detection, testing of cartridge performance, stereo spread/balance, output monitoring and more.
Owner's Manual specifies special RCA cables - originally supplied with the MPI4, now long gone - must be used for making connections from the MPI4 to tuner and preamplifier. I checked with Ryan and he said modern shielded type RCA cable should suffice. Shielded cabling being less commonly available back in the mid '70s when the MPI4 was being produced.
All functions seem to work fine with the cables I'm using.
Dual trace mode. Upper trace is left channel.
Stereo Mode below.
Purchased from Audio Classics it's in great condition.
Very handy tool for multipath detection, testing of cartridge performance, stereo spread/balance, output monitoring and more.
Owner's Manual specifies special RCA cables - originally supplied with the MPI4, now long gone - must be used for making connections from the MPI4 to tuner and preamplifier. I checked with Ryan and he said modern shielded type RCA cable should suffice. Shielded cabling being less commonly available back in the mid '70s when the MPI4 was being produced.
All functions seem to work fine with the cables I'm using.
Dual trace mode. Upper trace is left channel.
Stereo Mode below.