[ms660]

Are you sure those waveforms are on the emitters of T303 and T304? The reason I ask is that at 1kHz there should be almost zilch there, eg: flatline on the 'scope as both emitter resistors are by-passed to ground by a 100uF capacitor in the schematic, if they are the emitter waveforms then distortion aside the capacitors for whatever reason aren't doing their job, either they have lost their value or their connections to the emitters or ground are faulty.

Lawrence.