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Stereo Guitar Cab 16ohms?

elfro89

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Ok I have a 2x12 that can be run at 8ohms mono or 16 ohms stereo, I want to run two amp heads through the left and right speakers independantly, so my question is since its 16 ohms for stereo operation how do I match the impedance?  Would I run each guitar amp at 16 ohms or both at 8 to make 16?
 
You would run each amp at 16ohms. You should have two 16 ohm speakers in the cab. I would double check that. I would feel a lot better about giving you advice if I knew what kind of cab and speakers you're using.
 
8 Ohms mono/16 Ohms stereo implies two 16 Ohm speakers, which can be used separately, or combined in parallel at 8 Ohms.
If you are not combining the speakers to be played mono, the impedance would be 16 Ohms per side. The amps should be set to match this, at 16 Ohms per head.
 
elfro89 said:
Ok I have a 2x12 that can be run at 8ohms mono or 16 ohms stereo, I want to run two amp heads through the left and right speakers independantly, so my question is since its 16 ohms for stereo operation how do I match the impedance?  Would I run each guitar amp at 16 ohms or both at 8 to make 16?
Line6man is correct.

In effect, you will be running "dual mono" if you have an amp connected to each speaker.  That is one of the misconceptions of "stereo".  In order for something to be truely stereo, there has to be common center information relating to the left and right channels.  If you record a singer/guitarist playing a song on acoustic, pan the vocals left and the guitar right, it is NOT stereo.  If, however, you record the guitar with 2 microphones, one pointed at the bridge and one at the neck, and pan those mics left and right, the guitar will have a stereo "image", even though it is a mono instrument.  The difference is subtle but important.
 
its a harley benton with 2 celestion vintage 30's, on the back of the cab is 2 inputs labelled left and right with a switch above them that says "stereo 16ohms, mono 8 ohms"

Andy thats exactly what was confusing me, surely having 2 seperate heads would be 2 mono signal chains and not a stereo one, but im pretty certain the mono switch is the 2 speakers in series, and the stereo is them split to form left and right channels, it would be nice if the manual had information that explained it a bit better.
 
It's cool, in my sober state I googled the cab and in the stereo position its 2 seperate channels running at 16 ohms each at 60w. 

Which means im gonna have one badass setup, im gonna get a second low watt tube amp to really crank during those club shows and have my 50w hughes and kettner for the clean headroom, Can't wait for this :D
 
elfro89 said:
its a harley benton with 2 celestion vintage 30's, on the back of the cab is 2 inputs labelled left and right with a switch above them that says "stereo 16ohms, mono 8 ohms"

Andy thats exactly what was confusing me, surely having 2 seperate heads would be 2 mono signal chains and not a stereo one, but im pretty certain the mono switch is the 2 speakers in series, and the stereo is them split to form left and right channels, it would be nice if the manual had information that explained it a bit better.

Stereo means two signal chains, one for each speaker.
The mono switch on the cab places the speakers in parallel, based on the information you have provided.
Two 16 Ohm speakers in series would make 32 Ohms, but parallel makes 8 Ohms.
 
Years ago, I rewired a 4x10 cab to be 4ohms per side dual mono.  A Mesa Dual Rectifier ran one side and my Bassman 100 ran the other.  I used a stereo pan pedal to swap between or both.  I loved it and soundguys hated it.  Lazy bastards.

-Mark
 
AprioriMark said:
Years ago, I rewired a 4x10 cab to be 4ohms per side dual mono.  A Mesa Dual Rectifier ran one side and my Bassman 100 ran the other.  I used a stereo pan pedal to swap between or both.  I loved it and soundguys hated it.  Lazy bastards.

-Mark

Yes! They will need to mic up both speakers for this rig like. And I really hate it when they insist on having the mic right in the middle of the dustcap, with the vintage 30's it just sounds like crap. I will always move the mics off the dustcap, nothing worse then a lazy inexperienced sound engineer.
 
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