Jafant, although the Silver Electra 7 is not fully burn in yet, the sound quality is very good at the moment. The treble has more energy and sounds more extended with greater clarity than the Electra 7. Music used is mainly classical piano. Piano sounds more more illuminated and dynamic on the silver electra 7, flatter and duller on the Electra 7.
In comparison to my reference Acrolink 8N-PC8100 cord, the Silver Electra 7 actually sounds more extended in the treble. The Acrolink sounds more controlled with a fuller midrange and treble. Basically a sound that is fuller, warmer with a slight reduction in airiness.
The Silver Electra 7 will be better for systems which require more treble energy and dynamics. On the other hand the Electra 7 will be more suitable for brighter systems since the sound is duller. All these Wireworld power cords are used on DACs since I already have a good Acrolink cord on the amp. Based on my previous experience, the WW Electra 7 does not sound good on amps so it will always go to the DAC or CD player. The Silver Electra 7 will also be used only on DACs.