JBL Lancer 66

[RTally]

I see. The original surrounds are rotten, I have removed it and have purchased new surrounds from e-bay but has not received yet.

But the crossover consists of 5 resistors, two 4 ohm on the low mid and high. Two 20ohm resistors and one 2 ohm resistor connected with inductance and capacitor. The connection seem different with the JBL datasheet.

I would ignore information you find on the Internet and rely on what you find in your speaker, particularly if it looks like what was originally in there. Manufacturers commonly made changes over the years of a model run. Sometimes they used what was on hand to build the speaker, such as using multiple resistors.

You are best off replacing only the caps. Use new caps with the same capacitance values. The voltage rating does not matter as long you use a cap with the same or higher voltage rating. Higher voltage ratings mean the cap will be larger. If the sound is still off after recapping, then I would check for other problems and consider replacing other components.

 

[CSkoo]

Thanks for your input. I will follow the connection found in my speakers.The capacitor used is non-polarised type, right? There are different versions of JBL Lancer 66 speaker found online, the crossover and the woofer also different.

 

[RTally]

Thanks for your input. I will follow the connection find in my speakers.The capacitor used is non-polarised type, right? There are different versions of JBL Lancer 66 speaker found online, the crossover and the woofer also different.

All capacitors used in passive speaker crossovers are non-polarized. There is no polarity. I try to orient the caps so that the value markings are visible after installation.

 

[CSkoo]

May I use higher cap value like 6.8 mf?I can't get the exact 6 mf cap. Would higher cap value affects the sound,especially high frequency side?

 

[ivandezande]

May I use higher cap value like 6.8 mf?I can't get the exact 6 mf cap. Would higher cap value affects the sound,especially high frequency side?

https://www.parts-express.com/dayton-audio-dmpc-62-62uf-250v-polypropylene-capacitor--027-427

 

[RTally]

May I use higher cap value like 6.8 mf?I can't get the exact 6 mf cap. Would higher cap value affects the sound,especially high frequency side?

You should try to get as close as possible to the original capacitance value. A 6.8 uF cap is more than 10% from what was used. Don't do it. If you must deviate, the 6.2 uF cap linked above is close enough to the original that it will work.

Capacitors can be wired in parallel to obtain correct values. For example, 4 uF and 2 uF caps wired in parallel gives you 6 uF.

Voltage ratings do not matter as long as the voltage rating is equal to or greater than the original cap.

 

[CSkoo]

Thanks RTally and ivandezande for the infomation. This is my first time to recap the speaker. I am really apprecited all AK members whose provide me useful knowledge and experience..