I have an SWR Goliath III Jnr, and the horn is hissing, not really loudly, but loud enough that I notice it when I stop playing. I have had the cab for about 5 months, running it through an old Peavey head. The Peavey sucked, so I am borrowing an Eden WT-400 for the weekend, and possibly buying it if I like it. The hissing was always there with the old Peavey, but it was way quieter than when I use the Eden. If I move the lead around a bit, the hissing seems to kinda go louder or quieter, and if I turn down the horn attenuator the hissing dies as well. If I turn up the master volume on the Eden, then the hissing gets louder. If I turn down the volume on the bass, the hissing doesn't change. Has anyone had this problem before? I'm new to using a quality head, and I know the previous owner pretty well and I trust him. I'm yet to talk to him about the hissing, but he told me when I picked up the Eden that he has never had any problems with it, and is only selling it because he is getting a much more powerful head. Could the horn in my Cab be stuffed? Any help that you can give would be GREATLY appreciated!! Thanx.