Recently had my 10+ years old pair of F110 recapped by the Canadian authorised distributor, Gemsen Electronics, Concord Ontario.
JL provides a kit consisting around 10 capacitors for each sub.
Both subs would clip very easily and emitted a buzzing sound with no signal applied, and above all, the base was hard sounding and painful, as if someone is rubbing sand paper on my ears.
All of the above is now corrected, both subs puts out equal pressurization and plays base to my full enjoyment without any pain.
I am so glad Gemsen help me out and will re-cap again within the next 5-7 years.
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