ah ah Yeah. If it were 21.8 it'd be bad.. but that's practically 22. thanks for your time and patience. I'm gonna write the helping hands' people on the inside of the box c:
Ha ha, you're welcome. So, area of slot is 7 * 0.75 = 5.25 square inches, now we divide 22 by 5.25 to give the length we need, so 4.2 inches (approximately, haha) Yes?
I guess? Will that solve the stuff? I might make both designs and not glue in the back wall wherre I'll temporarily put the port. The final design will have the port in the front if I can get the speakers to not collide phase wise. Should I be concerned about that?
Who knows? haha. Good idea with the temporary fixing, just incase we've been wasting our time 😉. A question....why do you want to make these changes?
The import costs to get the port here would be too much, the port wouldn't fit on the front wery well with design (I don't like back ports that much) and I'm just a slot port wh.. Addict! 🙂
You're making this too hard (although I think you should understand the math):
Port Length Calculator
Port Length Calculator
I mean eh.. who doesn't like slot ports? You don't even need to buy anything. Natural and single minded.. SEXY AS Mangos TOO.
There will probably come a time when the only things that exist in the world will be on line calculators.......then, what will we do for fun?...😛
Anna,
Looking at your figures above, I believe you have it correct: shelf port 0.45" high by 7" long. My best guess is that this should work just fine. (although you should remember what Ben Franklin said: Free Advice, worth every penny you paid for it.)
Changing from round to slot will have some effect--greater surface area means more friction with the air slug in the port. Dave Dlugos (P-10) uses this feature in his Fonken and related designs to good effect.
If you want to compensate for the internal volume lost to the thickness of the slot plate, you might add 0.3" to the height of the cabinet. If you want to do a round-over on the ends of the slot plate, then add a fraction of an inch to the length to compensate; exact length depends on the radius of the round-over.
Cheers, Jim
Looking at your figures above, I believe you have it correct: shelf port 0.45" high by 7" long. My best guess is that this should work just fine. (although you should remember what Ben Franklin said: Free Advice, worth every penny you paid for it.)
Changing from round to slot will have some effect--greater surface area means more friction with the air slug in the port. Dave Dlugos (P-10) uses this feature in his Fonken and related designs to good effect.
If you want to compensate for the internal volume lost to the thickness of the slot plate, you might add 0.3" to the height of the cabinet. If you want to do a round-over on the ends of the slot plate, then add a fraction of an inch to the length to compensate; exact length depends on the radius of the round-over.
Cheers, Jim
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