Pre-73 Mk III The signal path uses only

The signal path uses only discrete components like resistors

Low-Cut Filter: 3 dB/Octave @ 100 Hz

99% pure oxygen-free copper

silver-plated copper wire is used for the internal connections

External power supply to avoid interaction with the audio circuits and transformers

Pre-73 Mk III The signal path uses onlyThe PRE 73 MKIII is a one channel vintage style microphone, line and instrument preamplifier. The signal path uses only discrete components like resistors, capacitors and transistors. The in and output is transformer balanced, using two different transformers, each one optimized for its purpose. This is the way audio components were built before integrated circuits became available. The circuit used in the PRE 73 MKIII is similar to the preamp section