JJ ECC803S Gold Pin
The JJ ECC803S/GP (12AX7) is an open sounding, robust and reliable tube with gold plated pins. The internals of this tube are manufactured to tighter tolerances than the regular JJ ECC803S. This makes the sonics of this tube better and more refined than the regular JJ ECC803S. Its design is based on the Tesla ECC803, which in turn is based on the Telefunken ECC83.
This is a very nice and musical audio tube but it also performs very well in the guitar amps.