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  #1  
Old 08-02-2010, 11:21 PM
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Join Date: Apr 2007
Issues with my SVT 810E

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Okay, so I bought an older 810E box from a guy for $100. When I bought it, only the center 4 speakers worked, something about that struck me as it not being a problem with the speakers, but somehow the wiring.

The model is so old that it only has a single 1/4" input jack. No multiple jacks, no speakon. All of the speakers are stock SVT 100 watt 32 ohm speakers, checked the wiring and it's wired parallel.

I took the cabinet to a space I jam at so I could work on it. My first test was to swap the lower right speaker (#8) with the one above it (#6). When I bolted the screws back in, and plugged in, the speaker I in #6 was still working, whereas the original one in #6 that I placed in #8 was no longer going. So, I then did the same with the rest of them. So all of the center speakers were on the very top, or very bottom, respectively, and upon doing that, all of the center speakers still worked, except the center speaker that was on the bottom left (#5). The one that I swapped it for (#7) was actually working. So, I determined that 7 or the 8 speakers are actually working. I figured they weren't blown when I slowly and firmly pushed into each speaker near the dust cover and nothing was griding. I decided to snag some 16g wire and proper disconnects, and just re-wire the whole thing from scratch, which I did tonight.

The only thing that wasn't rewired were the original wires going from the input jack to speaker #1. Now, what's happened is that only the center 4 speakers were working once again. Keep in mind, these are all swapped from the original placements they were in, top left ones swapped, top right ones swapped, etc. So, now I've confirmed all 8 speakers are functioning. So, I decided to swap them back to their original placements. Now what's going on is that the top 2 speakers are running, the two underneath them in the upper center are not, the 2 below them in the lower center are, and the lowest right one is, while the lowest left one isn't.

I am running this through an SVT-3 Pro, which is an 8 or 4 ohm cab depending on the number of cabinets I use, so the fact that running one out as a 4ohm from the amp, into a cabinet that is a 4 ohm cabinet, I should be square on impedance.

All of this is absolutely nutty to me. I'm not a pro at rigging wiring, but positive is going to positive, negative is going to negative in a parallel fashion, but the fact that all of the speakers work, and that they seem to work when they just feel like it just has me going insane. I leave to go on tour for 2 months in 3 weeks and would ideally love to have this cabinet working before I head out.

Any ideas?
  #2  
Old 08-03-2010, 12:18 AM
MIJ-VI's Avatar
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Join Date: Jan 2009
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Strange indeed.

Does the battery test confirm your observations?

Can you borrow a multimeter to verify the continuity of the cab's speakers and wires individually and as a whole unit?
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