m00n Posted March 19, 2010 Share Posted March 19, 2010 I have a speaker cab, it's got 2 10" speakers in it. They are both 8ohm speakers. They are wired up in series. Should my amp be set to a 16ohm impedence? Quote Link to comment Share on other sites More sharing options...
Ironsave Posted March 19, 2010 Share Posted March 19, 2010 I have a speaker cab, it's got 2 10" speakers in it. They are both 8ohm speakers. They are wired up in series. Should my amp be set to a 16ohm impedence? Not sure if you need to set your amp, but two 8 ohm speakers wired in series should present a 16 ohm load. (I believe you should set it for 16 ohms; but not 100% sure if it is necessary). Good luck! Quote Link to comment Share on other sites More sharing options...
JL Sargent Posted March 19, 2010 Share Posted March 19, 2010 Zt = Za + Zb Quote Link to comment Share on other sites More sharing options...
jtnfoley Posted March 19, 2010 Share Posted March 19, 2010 Zt = Za + Zb For series! Parallel should be Zt = 1 / ( (1/Za) + (1/Zb) ) if I remember my basic electronics. [] Quote Link to comment Share on other sites More sharing options...
jacksonbart Posted March 19, 2010 Share Posted March 19, 2010 I woulda thought it would been 1/2 the ohms (now 4) when running 2, 8 ohm speakers in parallel. That is the resistence drops not increases. Quote Link to comment Share on other sites More sharing options...
neo33 Posted March 19, 2010 Share Posted March 19, 2010 Series wiring doubles the impedance and parallel wiring halves the impedance. Quote Link to comment Share on other sites More sharing options...
m00n Posted March 19, 2010 Author Share Posted March 19, 2010 Cool, thanks all... Needed to ensure I wasn't going to fry my DIY guitar tube amp. Quote Link to comment Share on other sites More sharing options...
tube fanatic Posted March 19, 2010 Share Posted March 19, 2010 You didn't state if your amp is solid state or tubes. If the former, it probably isn't critical, as most solid state amps are meant to operate over a wide impedance range (but with less output at 16 ohms than 8, for example). If it's a tube amp, you absolutely must use the 16 ohm taps for the tubes to "see" a proper load impedance. Failure to do that results in markedly increased distortion. It also will greatly affect the power output. Quote Link to comment Share on other sites More sharing options...
JL Sargent Posted March 19, 2010 Share Posted March 19, 2010 Original post by mOOn said they were wired in SERIES? Formula given. Quote Link to comment Share on other sites More sharing options...
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