This is a 12" monitor speaker from a Yamaha SV12M stage monitor, it works perfectly. This 8-ohm speaker is rated for 300 watts and is a direct replacement for the SV12 as well as the S112v. Nothing wrong with the speaker, took the enclosure out of storage (actually haven't ever gigged with it, just practices) and decided to use the enclosure as a 1x12 with a guitar speaker. This line of speakers were manufactured by Eminence. Thanks for looking!