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Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 12:05 pm
by Frankie99
I bought a yorkville 4x10 bass cab.
Get it home, no sound, amp goes into protect when connected and played. Tested with another working head, no sound again. Opened up the input module on the cab and I see what you see below, with a burned out lighbulb as a fuse of some sort? Can't seem to find a lot of info online, anyone had experience with something like this? I thought I was just getting a passive 4x10.
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 12:17 pm
by Kniferide
Frankie99 wrote: Tue Feb 03, 2026 12:05 pm
I bought a yorkville 4x10 bass cab.
Get it home, no sound, amp goes into protect when connected and played. Tested with another working head, no sound again. Opened up the input module on the cab and I see what you see below, with a burned out lighbulb as a fuse of some sort? Can't seem to find a lot of info online, anyone had experience with something like this? I thought I was just getting a passive 4x10.
Cant tell if there is anything else on that board like some sort of crossover network but if you don't care about overload protection you can bypass that light bulb with a piece of wire maybe. Just get it out of there?
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 12:31 pm
by Frankie99
Yeah I'm tempted to just wire it an bypass all that shit.
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 1:29 pm
by Frankie99
Found the manual and part number, there is a cross over light bulb / fuse / limiter
12V 24W SC BAYONNET
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 1:31 pm
by Dr Tony Balls
Frankie99 wrote: Tue Feb 03, 2026 12:05 pm
I bought a yorkville 4x10 bass cab.
Get it home, no sound, amp goes into protect when connected and played. Tested with another working head, no sound again. Opened up the input module on the cab and I see what you see below, with a burned out lighbulb as a fuse of some sort? Can't seem to find a lot of info online, anyone had experience with something like this? I thought I was just getting a passive 4x10.
You can scrap all of that stuff if you just want to run it as a plain ass 4x10. You'll lose the crossover capability and the limiting feature, though.
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 1:41 pm
by Frankie99
Where is the meme about "I've never known what a crossover does and at this point....."
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 2:00 pm
by twelvepoint
I had a pair of Community PA speakers that used lamps as fuses. Why did they not use fuses as fuses? I do not know.
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 2:02 pm
by Frankie99
Imma buy a bulb at the hardware store and if that doesn't do the trick - it's clearly burned out - then I'll just wire it straight and call it a day for now.
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 2:07 pm
by Frankie99
twelvepoint wrote: Tue Feb 03, 2026 2:00 pm
Why did they not use fuses as fuses? I do not know.
It seems like a legitimate question to me. Especially in a bass cab that moves around and is heavy as fuck. Feels like a problem just waiting to happen.
They do make marine bulbs which fit the specs and seem far more durable, I am inclined to think that's what was the intended part for this job. I will buy what they've got in stock at the decent place up the street and see.
Re: Small questions that don't fit anywhere
Posted: Tue Feb 03, 2026 3:51 pm
by Dr Tony Balls
twelvepoint wrote: Tue Feb 03, 2026 2:00 pm
I had a pair of Community PA speakers that used lamps as fuses. Why did they not use fuses as fuses? I do not know.
They're more like a limiter. When there's excess current being drawn a fuse breaks. A light bulb absorbs that excess power by lighting up and then goes dim again when it dies back down. I think this is only used when tweeters are involved...
