**good thoughts but still no clear concise answer**
SY said:

** **

Consider a soure that has an output voltage of V across a load Z. V can vary with time, the source can have a Thevenin or Norton character, whatever, you just have V across Z.

Now, double that voltage and series two Zs. The voltage across each Z is still V. If that is the case, the damping has remained unchanged.

A quick simulation in Calsod showed exactly that- the frequency response did not change a bit, therefore damping stays the same.

A reasonable question, and one that John K raises, is what happens when non-identical drivers are put in series...

This seems to demonstrate the that drive operates the same but not that it damps the same. take for instance a pulse after which there is no drive voltage instead here the drivers act as the source and the amps as the loads. Thanks for your time

Take care

sbrads said:

**The electrical damping factor on the back EMF may be the same for nice steady tones driving both identical series woofers, but it's unlikely to be the same in the real world because of one experimental observation..... **

If you tap your finger on a woofer cone you'll probably hear a resonant thud, but short the terminals out and you get a shorter more damped and quieter sound. Put 2 in series shorted out and tap one cone and it will be resonant again but not as bad the open circuit version. This is because the generated current flowing is reduced by the other coil which in this situation just look like an approx 6R series resistor. Therefore any resonances etc that are different between the 2 woofers won't get the full damping. No problem though if everything is identical between the 2 woofers, but what chance of that is there in a real speaker cabinet with real woofers?

Doesn't still answer the question but it is an excellent thought this might be a potential clear advantage to parallel configurations.

Heres my issue my mids are very stable through therie operating rage at 4.9 to 5.1 ohms therfore in parallel 2.5 ohms and series 10 ohms. the amps are meitners w/67 volt mains and max current output of 35 amps (not continuous probably more like 18 amps. refering to Otawa's (probably misspelled) contention that impedance drops to 1/6th of nominal impedance we get this

Parallel max i = (67-2)/2.5 * 6 =~ 170 amps

Series max i = (67-2)/10 * 6 = 39 amps

parallel seems like a better option presently the system is parallel and it does bleed out well below pushing the preamp (also meitner).

But to generate a comparable crossover to just see will cost about 300 buckc it is all 8 gauge northcreek coils and their caps not to mention tearing the speakers apart and rebalancing the tweeters.

Thanks for your thoughts

Take care