The Grad 1 preamp by Avondale Audio was at first called the 'Graduation 1' by its designer, Les Wolstenholme.

This was quickly shortened the 'Grad 1', and still remains, affectionately, known by its owners as 'the Grad 1 preamp'.

It was also called the 'G1 preamp', which is more in line with Avondale's naming its power amps and power supplies with such terms as T65, M130 (power amps), TPX, TPX1, TPX2 (power supplies).

The Grad 1 preamp (G1 preamp) sonically still remains at the front of audiophile preamp technology.

The TPX1 and TPX2 power supplies are the power house supplies, with the TPX2 currently being 'simply the best' available, at any price.

For the complete description of the Grad 1 preamp, see 'G1 preamp' on this site.