According to my notes, it is stated the CC amplifier, an emitter-follower gives low output resistance and buffers the high gain stage from the relatively load resistance. I just don't seem to understand what this exactly means ? Can anyone enlighten me
The load is 250 Ω. If it had been connected to the collector of the C-E amplifier (through C5), then the effective collector load resistance would have been 4700 Ω in parallel with 250 Ω, and the gain of the C-E stage would have been drastically reduced.
The emitter follower has a low output resistance to drive the low resistance load, and a high input impedance to avoid loading the C-E stage.