I'm not about to try this but what do you think?

[jazzyvee]

Just spotted this on a facebook bass amplifier group.
Apparently wired this way to get the amp to run at 4 ohms.
Just to add to the fun, the poster states those are guitar cables.

I do remember one time on tour playing guitar where I used a marshall guitar rig from the band "Morgan Heritage" that had something like that setup, and was told the 4x12 cab is wired stereo split between each pair of speakers.

[edwardofhuncote]

I'm not smart enough to know whether that will work out, or cause a catastrophe... it actually looks interesting. I guess it accomplishes the goal of decreasing the amp's experienced load, but what is the result, from an audio standpoint? Dual mono in one cab?

[JimmyJ]

Nope, not really.  Presuming what we see here is two cables running from the two amp outputs to the two speaker inputs, the result should be exactly as if you used one.  The outputs of the amp are wired in parallel and presumably so are the arbitrarily named  "Input" and "Output" of the speaker cabinet.  So connecting a second cable across both those parallel jacks would not change anything electrically EXCEPT that I believe the two wires would be sharing the current.  Doubt you could hear any difference though.  It's possible those are actually speaker cables but yeah, shouldn't be using single-conductor-in-a-shield cables for that application.  Maybe they just forgot to pack their Speakon cables?     Unless the owner has wired this cabinet in stereo which could explain this oddity.

Jimmy J

[gtrguy]

SWR made identical model speaker cabinets in 4 and 8 ohm ratings. Currently SWR is out of favor (or 'out of style') and the cabs are not very expensive used, though I like them a lot if they are in good shape. I just saw a 4X10 Goliath senior at my local GC store for $239 bucks. I would just buy a 4 ohm cab if you really wanted to do this.

[gearhed289]

I would expect catastrophe. I am not an expert, but it seems this would be the same as plugging one speaker output into the other speaker output. That can't be good! But there is the possibility the cab has been rewired. I've done that myself before.

[bigredbass]

I would not be willing to gamble with conjuring the Gods of Blue Smoke for a 3db difference in output on a paying job or even at home.

This could be a big gamble for a small return, and why on a professional stage with DI or professional reinforcement would I need that small bump anyway?

[lbpesq]

Designed by the same guy who brought us this:

Bill, tgo