Mullard 是英國有名的真空管製造廠，曾經製造出許多知名的管子。聲音有特殊優美韻味，但是有些與德國西門子SIEMENS、德律風根TELEFUNKEN管相比，少了高解析度。 但是此二者聲音特性常是難以兼得的。

※ Mullard Valves – The Blackburn Story – Part 1 – Works History 

http://www.youtube.com/watch?v=xnvKCC6_VDQ&feature=channel

※ Mullard Valves – The Blackburn Story – Part 2 – Parts Of A Valve

http://www.youtube.com/watch?v=qSDDNg4Zb3w&feature=related

※ Mullard Valves – The Blackburn Story – Part 3 – How A Valve is Manufactured

http://www.youtube.com/watch?v=8ztjI4geVRA&feature=channel

※ Mullard Valves – The Blackburn Story – Part 4 – How A Valve is Manufactured

http://www.youtube.com/watch?v=wDgOuI-RzgY&feature=related

※ Mullard Valves – The Blackburn Story – Part 5 – How A Valve is Manufactured

http://www.youtube.com/watch?v=1qMvhxo6B84&feature=related

※ Mullard Valves – The Blackburn Story – Part 6 – How A Valve is Manufactured

http://www.youtube.com/watch?v=Cyt9VvIzhSY&feature=related