Help Identifying Caps/Res ?

[Lusso5]

I've got some tweeters with built in x-overs, and I would like some help determining the x-over-point.

The two components I can visualy see on the back of the mount are:

a white rectangular piece with markings "3R9-J 5W-KM-8 Mu" (Capacitor ?)

a blue cylinder with markings "V/C BENNIC LAR BI-POLAR IFD 10MFD NV 50WV" there are no colored bands on this piece; it is all blue.

Would someone help me identify what kind of parts they are, in-turn, what mods they are making to the driver?

Thanks in advance.

 

[Apex Jr]

Parts

The white rectangle part is a sandstone resistor
3.9 ohm at 5 Watt 5% (J)
Bennic is the Manufacturer of the cap which is a
10 uf at 50 working volts.
Steve @ Apex Jr

 

[Lusso5]

Thanks Steve. Im starting to get the picture now, but does that cap identify the ohm rating?

The tweeter casing has 4ohm on it, but a 4ohm 10uf cap would cross it over at 4000hz (from the chart I have).

The tweeter is paired with a 8" woofer, and I just dont see why they would cross it over at 4000hz. I have the factory parameters on the woofer, and response is flat till 2000hz, but then it breaks up.

Could this cap be a 8ohm 10uf ? That would cross it over at 2000hz (makes more sense), but what does that do to the output/impedence?