EML 520B-V3

The Emission Labs 300B equivalent with better specs and higher power.

All of the Emission Labs tubes if bought in pairs or quads at the checkout are matched and come with warranty, datasheet and the original box. 

http://www.emissionlabs.com/datasheets/EML520B-Datasheet.htm

If you have any questions regarding products or shipping we are at your disposal via our contact form or e-mail best300b@gmail.com