In the process of rebuilding the crossovers in my RTA-15TLs, one question lingered in my mind:
In the tweeter network of the 15TLs (and many other Polk speakers) there is a resistor (2.5 ohm) and capacitor (12uF) in parallel ahead of the other elements filter elements.
1) What is the purpose of those components? My guess is that it shapes the response of circuit to attenuate the lower range of the tweeter's output.
2) Is there a comperable parallel network that would shape the response similarly, thus reducing the number of components in series with the tweeter?
Those of you with more crossover design knowledge, please jump in and set me straight :D