Here's a specific prototype I'm working on, with a 12" Tannoy coaxial. 2 ports, 70mm diam, 36mm long.
WinIsd calculates 1st port resonance @ 4.8khz
Subwoofer will be added below 80hz.
When the port is so short, does placement still matter?
Can I further optimize ports placement?
WinIsd calculates 1st port resonance @ 4.8khz
Subwoofer will be added below 80hz.
When the port is so short, does placement still matter?
Can I further optimize ports placement?
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Post #28, post #32 All that's left is the others talking about how close to boundaries to increase the end correction, so either crammed in the corners or up next to the driver and offset at 0.42, which will make them slightly longer than in the corners.
If you're worried about any HF port resonances somehow being strong enough to audibly modulate the driver (fat chance IME with small ports), then the pioneer's empty cab with a 'blanket' of insulation loosely attached over the back of the driver solves it.
If you're worried about any HF port resonances somehow being strong enough to audibly modulate the driver (fat chance IME with small ports), then the pioneer's empty cab with a 'blanket' of insulation loosely attached over the back of the driver solves it.
I can't say I've properly digested all the arguments here, but can I ask a simple question?
Is it OK for the port to be located on the bottom of the cabinet rather than front or back?
I'm assuming the bottom of the cabinet will be lifted to allow the port to fire into clean air.
Speaker would be a 5.5 litre Speedster, 30cm tall
Is it OK for the port to be located on the bottom of the cabinet rather than front or back?
I'm assuming the bottom of the cabinet will be lifted to allow the port to fire into clean air.
Speaker would be a 5.5 litre Speedster, 30cm tall
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