I'm Jai, new member here with first post. I've just been watching the fabulous and very interesting GR Research videos on Youtube on how to upgrade your speakers.
I have a pair of Focal Chorus 806W speakers that I'd like to upgrade using the methods described in the videos.
Danny from previous posts I see you used to be a Focal dealer have you come across these speakers before? I think they were a special edition using better W woofers by Focal as apposed to the V woofers used on more budget speakers. Any pointers on improving these?
I've never done anything like this before so thought I'd try on an old pair of broken speakers first before I start pulling apart by beloved speakers. I have a pair of old Focal Chorus 707s speakers, one woofer is damaged and makes a heavily distorted bass noise which I am using as a trail run. I opened the speakers and noticed some good and bad things. Good the speakers are made from thick MDF and have internal bracing bad, the wire inside is cheap quality and uses the spade connecters rather than soldered on.
Then onto the crossover circuit, as expected sand cast resistors and iron core inductors as is common for this price point. I've mapped out the cross over circuit for the high and low circuits. The only problem I have is figuring out what value the inductors are? There are no markings on them at all. The caps and resistors have values so easy enough for me to find replacements but no idea where to start with the inductors?
I have some photos of the cross over circuitry and one of the inductors incase it helps?
Any help much appreciated, thank you,
Cross over circuit:
Fully assembled cross over circuit:
Pictures of one of the inductors: