A Mullard AC044
PX4.org - Photo Gallery
The AC044 (ac zero forty-four) was made by Mullard. It is a direct electrical replacement for the PX4, but does not have the same sound quality (it's still very good).
The AC044 (ac zero forty-four) was made by Mullard. It is a direct electrical replacement for the PX4, but does not have the same sound quality (it's still very good).