Noticeable Sound Improvements With Speaker Re-cap?

Hello!

I own a pair of Infinity RS 4.5 speakers. I drive them with either a Krell FPB 600 or a Sunfire Signature 600.

Right now, they sound near perfect to my ears.

I keep reading in multiple posts that a re-cap will take them to the next level.

They are over 40 years old, so they are definitely due for new capacitors.

My question is this, for anyone who has performed a full re-cap on their speakers, what were some of the most noticeable sound improvements?

Thanks in advance!

bassfreak37307-01-2025 2:59pm

ta240 Details Discussions Posts This discussion Message User 1 posts 07-02-2025 at 06:07pm Copy Comment URL Report Comment Edit Delete I would think it depends on where in the crossover the electrolytic capacitor is. Depending on the location as they fail you could end up with drivers not receiving as strong of a signal as they should or getting frequencies that aren’t ideal for them to be trying to reproduce. Replacement capacitors can have different effective series resistance which will also affect the crossover. The downside of replacement is if you are thrilled with the sound now that may change. On my 20 year old speakers that had an electrolytic in line with the tweeter there was a noticeable improvement in the high frequencies. Now, I don't know how much of that was form a half ohm less resistance.