​​Fly HiFi

1975 McIntosh MPI-4 "Maximum Perfomance Indicator"

Fully serviced units in Ex Cond.
2 available

"The McIntosh MPI 4 is a laboratory grade instrument providing the facility to continuously monitor the quality of the performance of a stereo system.

The MPI 4 can sample and display signals from the tuner, preamplifier and power amplifier without reconnecting cables.

Signals are displayed on an oscilloscope screen calibrated with scales for tuning, measuring and testing."