TL MOD Explained What it does

Tronman

I see a lot of questions on the need for the 5.8uf Capacitor in parallel with the 2.7 Ohm and what exactly adding the 5.8uf cap does to the circuit.
From what I have read here the RDO-198 rolls off on the high end so you add the 5.8uf in parallel with the 2.7 Ohm which changes impedance with frequency, the lower the frequency the higher the impedance (Resistance of the circuit) therefore it brings the lower end of the frequency down and has very little effect on the high frequency therefore giving a much flatter response from the tweeter.

I don't know the exact frequency response of the RDO-198 but I would guess the Tweeter plus the impedance matching would help flatten the response out.

I basically added the values to the equation and plotted it in EXCEL to give you a visual of what the two components in parallel are doing compared to frequency.

You can follow the link below and plug your values in and see how the impedance (Resistance/Ohms) changes with frequency.

Chime in anyone if you have more info.

The complex impedance (Z) (real and imaginary, or resistance and reactance) of a capacitor and a resistor in parallel at a particular frequency can be calculated using the following formulas. SEE PICTURE BELOW

Where f is the Frequency in Hz
C is the Capacitance in Farads
R is the Resistance in Ohms
XC is the Capacitive Reactance in Ohms

http://chemandy.com/calculators/ac-networks/capacitor-and-resistor-in-parallel-calculator.htm

Tronman

Post again for the frequency response

BKphoto

allRightyThen...