Trying to understand this LPF better

[Mike-Toronto]

Hello all
I am trying to gain a better understanding of this basic LPF. In another tread is was described like this...

L1: 2.7 mH switchable to 3.6 and 2.0
L2: 500 uH (with 10 ohm parllel)
C1: 5 uF

Ok so I understand enough to see that L1, L2 and C1 make up a basic 18db LPF.

My main question would be what is the function of the ten Ohm resistor run in parallel with L2?

Thanks for any insight

EDIT: Ok ill take a guess... Is it a simple zobel to keep things more predictable?

 

[Thawach]

the LPF filter to be added with Contour network.

http://www.diyaudioandvideo.com/Calculator/Contour/Help.aspx

 

[Mike-Toronto]

Thanks for the link.