Hissing Hartke 4x10

[aggiebass09]

I'm currently running a Behringer UltraBass 300-watt head with a 4x10 Hartke transporter cab. I noticed not long ago that the cab has developed a hissing sound. It was tolerable not noticeable in a live setting but it's gotten to the point where I can't play a live show with the cab.

I've used the head to DI into a PA and there was no hiss so it's not the head. Neither of my basses are the issue because those have been tested in other amps.

I don't think the speaker is blown because I still get good tone but there's just an overlying hiss over everything. Anybody have any suggestions?

[aggiebass09]

nothing?

[Joe Milo]

I play thru a Hartke LH500 amp and Hartke 410XL. My rig hisses too. If I turn down my Treble Boost/Cut on my bass the hiss goes away. At least that has worked for me.