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Computer based signal generator?
New build for shop system
- Thread starter AngrySailor
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AngrySailor
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No, I had borrowed an OLD ass hand held sine wave generator. Super basic, dial with RCA outs. I have an app on my phone but I don’t really think it’s signal quality is too hot.
One cabinet mocked up for the most part. Just sorting out details and then going to make a cutting list for the other three. That’s ay each cabinet will end up with the exact same internal bracing/volume reduction.
These bastards are HUGE...
One cabinet mocked up for the most part. Just sorting out details and then going to make a cutting list for the other three. That’s ay each cabinet will end up with the exact same internal bracing/volume reduction.
These bastards are HUGE...
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AngrySailor
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Weak pile of bracing... I think there’s gonna be 10lbs of screws in these when I’m done...
I’ve got a list going of parts, we’re going to make sure this one goes together good then cut and number everything as many parts are only different by 3/4”... it’s possible a
Couple got messed up... possible...
I’ve got a list going of parts, we’re going to make sure this one goes together good then cut and number everything as many parts are only different by 3/4”... it’s possible a
Couple got messed up... possible...
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AngrySailor
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This one is ready for sine wave testing. Tomorrow I’ll bring one of my commercial amps and the second speaker over. Just one speaker sitting in the hole with a board over the other she has a deep tone with a gentle tap on the speaker... sounding promising.
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Thatd coolness...
AngrySailor
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Just ran a frequency sweep on the first cabinet. It’s really hard to tell visually, I almost think my extra port length has me tuned lower than the 20hz my phone app signal generator can go. I really need a series resistor and read the resonance with my multimeter. Now where the heck can I find a 5-10ohm 10w resistor in bumble-eff nowhere, on a Sunday?
Going to carry on cutting the bracing for the rest of the cabinets today and fine tune after.
Going to carry on cutting the bracing for the rest of the cabinets today and fine tune after.
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J!m
Veteran and General Yakker
Might be cool to have the ports come up and out the top five feet or so. Pipe organ style...
orange
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You Tube has a video test for that, I don't have the link right now but it goes from 0 Hz and can do some possible damage if you don't pay attention to volume.
AngrySailor
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There’s Trever cutting the last piece. Other than a little trimming that’s all the wood done. Ended up using 10 sheets almost exactly. Have half a sheet left but used a couple quarter sheets from the lo-max build. Not bad waste wise either. Not really enough for a little camp fire!
Speaker lubricant break now.
Speaker lubricant break now.
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orange
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Good planning...
AngrySailor
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Luck, we were pretty drunk..
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Being drunk doesn't necessarily preclude bad planning...
grapplesaw
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The only time to use power tools
AngrySailor
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Ran some numbers and the 11” port comes in at 21hz which is probably why I couldn’t get to resonance. I left these two ports long so I could sneak up on the theoretical 9” for 26-28hz. Tonight I’ll cut them down and keep testing. Also going to try to find a suitable resistor rather than test visually, it’s hard to tell with larger speakers/cabinets and at the level you need to input to see the cone move, I think trevers shop might fall down...
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You can back out sheet rock screws..believe me..
AngrySailor
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Picked up two 10 ohm 5w wire wound resistors. They should work fine in parallel for this testing.
J!m
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Until they melt, anyway.
Where's the smoke?
Where's the smoke?
AngrySailor
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Got recruited to help fix buddy’s vintage sled. Old arty cat JAG 300. Broke a piston skirt by the looks of things. Not even sure my sunnen home will go small enough... I’ve seen chainsaws with bigger pistons!
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J!m
Veteran and General Yakker
Sounds like a good time to put those big chainsaw pistons in!