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In Reply to: RE: MG 3.7i exposed posted by Davey on August 27, 2015 at 09:01:59
It is not necessary to convert the mid-tweeter to a parallel config since the cap (mid-tweet hp) will protect the tweeter. In any case, my W4S amps are really well-behaved and there are not thumps and bumps in the night.
At this point however I am not sure how to simulate the "weird" effect of the 8 ohm mid on the series woofer.
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It doesn't block DC though, is what I'm saying......as it would in a parallel network. Yes, you do have the coil in shunt, but a good amplifier could still source/sink constant DC current to the tweeter driver.
However, I'm sure you'll be okay either way.
If the 8 ohm midrange measurement is correct....through the frequency range....then your simulation is correct. Ideally, you'd want to impedance sweep all three drivers and incorporate that into your simulation vice just a DCR measurement.
Cheers,
Dave.
Wendell confirmed the 8 ohm impedance and since the driver is essentially purely resistive, the impedance is essentially constant independent of frequency.
While I agree with you that in my case the concern about DC is somewhat moot, I would think that the HP capacitor of the parallel circuit that feeds into the combined mid-tweeter series network, should be sufficient protection. The woofer is paralleled via the inductor.
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