I have a matched quad of matching date code Blackburn Mullards for sale, These are all from 1964..(date codes GF2 B4F1) They are perfectly matched, and sound amazing. These are the classic British Mullards. They are extended, lush, with a midrange to die for… if you've never tried real Mullards you're in for a treat. They have less than 150 hours on them. They were in my Ayon Spirit MKIII (sold) and are just broken in.. NOS small signal tubes can last upwards of 10,00 hours so plenty of life left in them! Sold the amp so no need for these. If you look at the pictures what's pretty cool is that they are branded Hewlett Packard made by Amprex, except they were made by Mullard (the date codes tell that they were made in the Blackburn plant) for Amprex and then branded HP.. I paid $200.00 I'll sell the quad for $100.00 plus shipping
