My 4780 amp (parallel 3886, Audio Sector basic version) demonstrated much better sound stage when I changed the PSU from basic bridge FR diodes to CRC with total 40,000 uF capacitance. I am very familiar with Jazz at the Pawn Shop sound stage which I have been using as the reference 10+ years ago when I rather spent fortune for high end system than DIY. With Magnepan MMG, 4780 played it very well.