GK MB500 speaker outputs

packhowitzer · #1 10-02-2011, 04:59 PM

I am fairly close to pulling the trigger on an MB500 (I may hold out for the MB800 -- if they ever ship!). Any way, I see that there are two speaker outs on the back panel. To get the head to reach 4 ohms by connecting 2 8ohm cabs, would I connect one cab to each output or would I connect one cab to an output and then daisy chain? Or does it matter?
Also I have 2 GenzBenz NeoX 212T cabs. They only come in 4ohm config. May I also assume that there is no safe way to use both cabs with this head? I currently can use both with my Ampeg SVT4pro, but it has two channels so each speaker out can run a 4ohm cab. But i'd be out of luck for the MB500, right?

4Mal · #2 10-02-2011, 05:06 PM

You will need an external box to put the two 4 ohm cabs in series for a total 8 ohm load. I used to do that with a gK 1001 rb ii and 2 bag end 2x10's. Worked great. I think in your case I would hold out for the higher power version. 300 into 4 12's might not have the headroom you want.

For my uses, my MB2-500 A07 which is essentially the same amp as the MB500 - is plenty loud enough at 8 ohms with an f 12.6 ... yMMV...

packhowitzer · #3 10-02-2011, 06:02 PM

Well I have 2 Mesa 4x10s that are 8ohm cabs. How should those cabs be connected to make 500w @4ohms? Daisy chained or one cab connected to each output? The GB cabs are much lighter so I'd love to use those with the head if possible as well.

5port · #4 10-02-2011, 06:33 PM

Preferably:

One 4X10 to each speaker output. This will evenly divide the power between each cabinet with minimum voltage drop.

Second but not prefered:

Daisy chain the cabinets to one speaker output will work but is not ideal in that the second cabinet in the chain will get slightly less output because of the voltage drop across the lead going to it.