Currently Being ModeratedDec 4, 2012 7:41 AM (in response to metallicahp)Re: line 6 iv stereo to mono
You have one wire going to one plug, the other going to a second plug - that won't work! Not sure what you are trying to accomplish. The 150HD has two speaker ouputs, both need to be connected to 8 ohm speakers/cabinets.
Currently Being ModeratedDec 5, 2012 5:21 AM (in response to metallicahp)Re: line 6 iv stereo to mono
From your diagram, it doesn't seem you know electronics/electric stuff too well, so I would not suggest you try to do this yourself - most likely you will cause damage to your amp.
If you are set on using that cabinet - and don't want to get a 2nd matching cabinet - it will need to be modified to having two input jacks, each at 8 ohms. I would guess that the cabinet has four 8 ohm speakers, each pair wired in parallel (to give a 4 ohm load), then the two pairs wired in series to give an 8 ohm load. You woudl need to add a 4 ohm Power Resitor (in series) to each pair, then each pair would be connected to an input jack. Trying to run both left and right amp ouputs into 1 mono input is going to result in phase issues when you listen to it.
Currently Being ModeratedDec 6, 2012 12:50 AM (in response to fflbrgst)Re: line 6 iv stereo to mono
i would just buy another cabniet, if i couldn't afford one, i would just run 1 cabniet.
BTW.. i am using an old Marshall 1960a with my Spider IV 75, but my cab is 16 ohm.
wouldn't hurt running the amp at a higher ohm, but will running a lower ohm.