Recently had JS Audio do a stage 2 upgrade on my 17 year old A300 integrated amplifier and the results are very impressive. Initially it sounded much more dynamic with far more detail and control and as it has run in continues to get better and better. It has brought to life a 3 way speaker I was contemplating selling, they sound so much better, the transformation is quite staggering. I find myself listening to music at a lower volume than previously as the detail is much more apparent. John has been very helpful and informative and also talked through options for an obsolescence issue i had with my Linn CD Player and would definitely recommend him.
John Hilton