I have a Line 6 Spider II 150w amp, and a stereo 4x12 cab. I just got this gear a few months ago, but I just recently noticed that the input jack plate on the back of the cab had a mysterious hole next to the jack, and it looked an awful lot like another jack may have been there. So today I removed that plate, and gee whiz, there it was - another input jack, dangling inside the cab. The washer and nut are missing from it, which is why it fell in there into the black abyss of the cab.
Now, my question. The Line 6 amp is 150 - 75x2. It has stereo left and right output jacks, at 8 ohms/75w each. Before I found the missing jack in the cab, I plugged in each input on the amp into the cab. Sure enough, it was either the left or right speakers that were working, depending on the amp output I had hooked up.
Now I have both jacks out and ready to use on the cab, meaning I can use the full cab at 150 watts. My question though is mainly based from my limited knowledge of electronics. Here's how the cab is wired up:
Each speaker is 8 ohms. The way these are wired up, it's 16 ohms each side total, divided by two, which equals 8 ohms in each input. Am I correct on this? I want to make sure I won't blow anything up if I try to connect this thing in stereo. I'm skeptical because of the fact that the jack was dangling inside the cab; perhaps the previous owner did it on purpose because the amp wouldn't work for it? I don't really know. I just want to play it safe before I try plugging it all in.
So since each output on the amp is 8 ohms, and each input on the cab is 8 ohms (unless I'm wrong; if so, please correct me), then it should work no problem. Right?
Mainly, this whole thing is stemming from my confusion of series/parallel and the impedance. It's been a long time since I've had an electronics class. Thanks in advance.
EDIT: I made the pic myself, because I'm having a helluva time finding a pic of the wiring diagram for a 4x12 cab with stereo inputs. I made this pic based on my cab.
Now, my question. The Line 6 amp is 150 - 75x2. It has stereo left and right output jacks, at 8 ohms/75w each. Before I found the missing jack in the cab, I plugged in each input on the amp into the cab. Sure enough, it was either the left or right speakers that were working, depending on the amp output I had hooked up.
Now I have both jacks out and ready to use on the cab, meaning I can use the full cab at 150 watts. My question though is mainly based from my limited knowledge of electronics. Here's how the cab is wired up:
Each speaker is 8 ohms. The way these are wired up, it's 16 ohms each side total, divided by two, which equals 8 ohms in each input. Am I correct on this? I want to make sure I won't blow anything up if I try to connect this thing in stereo. I'm skeptical because of the fact that the jack was dangling inside the cab; perhaps the previous owner did it on purpose because the amp wouldn't work for it? I don't really know. I just want to play it safe before I try plugging it all in.
So since each output on the amp is 8 ohms, and each input on the cab is 8 ohms (unless I'm wrong; if so, please correct me), then it should work no problem. Right?
Mainly, this whole thing is stemming from my confusion of series/parallel and the impedance. It's been a long time since I've had an electronics class. Thanks in advance.
EDIT: I made the pic myself, because I'm having a helluva time finding a pic of the wiring diagram for a 4x12 cab with stereo inputs. I made this pic based on my cab.