help with speaker pop please
i just refoamed the 6.5 inch woofers in a set of used ( new to me ) bang & olufsen redline 140's. when i played them for the first time at high volume i heard this piercing pop sound. i can reproduce it at set volume levels and set scenes in movies.
i have multiple amps and another set of working rl 140's so i started troubleshooting. i narrowed it down to one speaker. here is where i am getting a little stuck. i pulled it apart and checked all the individual cone resistances. they all ohm in the 6.0 to 6.5 range. they are all also identical to the working speaker. i connected everything back up and checked the resistance on the speaker terminals. 6.5 ohms so it looks to me just like an 8 ohm speaker should. it also matches the working speaker.
short of replacing all the components on the xover im not sure what else i can do? i don't think the woofers would all ohm normal ranges if one was bad. there are two 6.5" for the low, one 4" or so for the mid, and one 1" for the tweeter. again all are 6.0 ish ohms in the speaker that doesn't work and in the speaker that works. any suggestions would be appreciated.