"115T" is recycled naming, if you had the series -RBX, -MBE, Backline etc there would be more to find easier. The pic looks like a 90's effort so that part checks out!
400w EV in that size cab would be a fairly heavy donk with a good rock voice. Probably not much in the way of fundamental tones from your E string, not that it matters.
Team Trace Elliot #1, IWNBARMPB Prezident, Mediocre Bassist #399, Old Basstard #86, PBBBC #2