I'm having Fliptops build me a sealed 4-10 cab that will be used with my Ampeg 76' V4 head that I just retubed and had checked. It seems to be a great idea in theory, and they have had good luck with them. It will compliment the V4 by being the same width, and the grillcloth and handles will be 70's style. the speakers are in 2 sealed chambers just like the 8-10 cabs are with the 4 chambers. Also the speakers are Eminence Legends, coming to an 8 ohm impedance total. They have made about a dozen of these so far, but I've yet to talk to anyone that owns one. It should be here in about a week. the build time is a month from the ordering date. $580.00 total shipped to me here in Utah. Any thoughts would be appreciated. My V4 is a "V4" not a V4B. I like the sound of the V4.