I presume you mean printed beneath the inductor.
I don't think the 04 is of any particular significance. Let's see what others think.
I believe this to be the crossover board:
IF SO: Since you are "very new to this", I will give you my opinion that there is nothing on this board that should require "upgrading". In fact, tinkering with it could upset the manufacturer's intended 'voicing' of the loudspeaker.
Some may say to change the BENNIC 14 MFD bipolar electrolytic capacitor at the bottom, but it will hold its value for several tens of years so there's no urgency in doing so.
(Note that 14 uF is not a standard value of capacitance and you couldn't replace it directly. If you cannot resist the impulse to change it, you could use 8 uF and 6 uF bipolar capacitors in parallel (or other suitable combination) to arrive at the required 14 uF.)
Frankly, I'd leave well enough alone, and certainly would not recommend changing the inductors for fear of completely upsetting the intended tuning of the speaker.
https://willys-hifi.com/collections/electrolytic-capacitors-non-polarised
Thanks! I do intend to change the manufacturer’s intended voicing, which is why I’m trying to understand these values.
This speaker is over 20 years old, so just by age alone the parts should be updated.
I’ve already upgraded the caps, which was a nice improvement.
Even the resisters I replaced the old ones with Mundorf. Also a nice improvement.
Either inductor or drivers will be next. It’s a fun little project for my novice skill set.
This speaker is over 20 years old, so just by age alone the parts should be updated.
I’ve already upgraded the caps, which was a nice improvement.
Even the resisters I replaced the old ones with Mundorf. Also a nice improvement.
Either inductor or drivers will be next. It’s a fun little project for my novice skill set.
I can't argue against having a bit of fun!
P.S. Inductor replacement is not quite as simple as resistor or capacitor replacement. If replacing the iron cored inductor remember to take dc resistance into account as well as inductance.
P.S. Inductor replacement is not quite as simple as resistor or capacitor replacement. If replacing the iron cored inductor remember to take dc resistance into account as well as inductance.
I have never seen a speaker manufacturer give guidance right on the crossover on how to modify it. Cutting the wires to convert to Active, removing 1 resistor to lower treble by 1dB.... Very progressive of Linn.
It's most likely there for dealers, to make the transition to active a little easier.
jeff
What makes you think that? Other than the electrolytic cap, the rest of those crossover parts are largely unaffected by age at 20yrs, especially the inductors. And even that Cap should still be good. It is high quality.
Now, if you just want to re-voice the speaker, maybe to better fit your environment, that is something else. But I would not be concerned with age here.
