This is part of my poor mans spectrum analyser built from a circuit by Eamon, EI9GQ

These two show the front and rear of an amplifier designed for use with walkman type audio devices. It is mono amplifier with impedance matching and mixing of the two audio outputs from the walkman.

This project worked well and the construction I felt was well thought out, it could still do with a few minor tweeks.

Quite pleased with the results.