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Chained speakers signal connected in series

I have two pairs of the same model speakers (Tannoy SGM 10B) connected in series to two monoblock amplifiers. The left channel amp drives two speaker cabinets on a left (speakers L1 and L2) and the right channel amp drives two speaker cabinets on a right (speakers R1 and R2).
The positive speaker output of the left amp is connected to a positive post of the first speaker L1(+). Then the negative post of the same first speaker L1(-) is connected to positive post of the second speaker L2(+) with the its negative post L2(-) connected to the amplifier's negative speaker output.

AMP(+) > L1(+)
L1(-) > L2(+)
L2(-) > AMP(-)

Both left channel speakers have a cross-overs build in. Does the audio signal that the first speaker L1 receives from amplifier is any different from a signal the second speaker L2 receives from speaker L1? Does the crossover of the first speaker L1 modify the output signal that goes to a second speaker L2?
esputnix
rodman99999
6,171 posts
 
 While you're listening through your pencils: you're going to simply ignore everything that a voice will induce to a signal, when actually presented with music?

                                        HILARIOUS (in a tragicomedic way)!

     Best broaden your horizons, as to what goes on (and can be measured/calculated) when certain elements (ie: caps and voice coils) are actually under the influence of *changing frequencies (ie: an actual audio signal) as opposed to DC (ie: a multimeter).

     *Ever looked at the impedance plot of a woofer, actually being used in a circuit?

       (https://audiojudgement.com/speaker-impedance-curve-explained/)    

           (https://www.apogeeweb.net/tools/reactance-calculator.html)

       Perhaps: even plug some of those facts, into your calculations?

  (http://oer2go.org/mods/en-boundless/www.boundless.com/definition/reactance/index.html)                
 
                       NAH, why bother with Physics, right? 🙄

          ps: I only bother posting such things, knowing they will be ignored by most, BUT: hoping someone out there remains interested in facts/learning.

                                             Happy LISTENING!
imhififan's avatar
imhififan
2,211 posts
 
@fiesta75,
I think it was 7 or 8 years ago, my friend use Hornresp (http://www.hornresp.net/) did a simulation on his speakers and found that connect two speakers in series the low pass filter cutoff frequency get lowered, our conclusion was the first woofer will see the voice coil of second woofer as an inductor in series, same for the second woofer, it will see the voice coil of first woofer as an inductor in series, and caused crossover point lower than a single woofer alone.
fiesta75
1,378 posts
 
If Lvc1 does not equal Lvc2 in a dynamic setting, then it maybe possible to perceive a change in the crossover frequency, maybe even measure it. I’m saying in a "grade school" math equation, the data does not support this. I personally don’t ever connect speakers in a series configuration, for MORE than one reason. It just would be nice to see some actual data from some physical testing or calculations that will support the crossover frequency change. Does anyone want me to post sketches or does everyone understand the circuit? I don’t want to spend more time on this subject unless someone has proof to show me. Enjoy the music!
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fiesta75
1,378 posts
 
I think audiokinesis nailed it here! I should have mentioned this before, thank you for sharing your knowledge.
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