Quoted from northerndude:i'm getting moist just thinking about it
Because you have "dude" in your username, I have to say...
(Topic ID: 183527)
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Total Nuclear Annihilation
Spooky Pinball, 2017
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3 months later
Quoted from TheNoTrashCougar:Thank you for the kind words! This one is definitely not tuned, so I will admit that, but the reason I added the ports is that this is not a super powerful system like most are used to designing. Although, it is more powerful than other machines in the past. At first I had the box 100% sealed and it sounded good, but I could tell that the sub was struggling pretty hard. I opened the system with the ports and the sub was able to breathe better and there was a significant increase in the sound output.
I think the main issue is that in pinball machines, screens are needed to be over the ports and the sub itself. I think these screens are causing sound issues, but I am not 100% sure and unfortunately, they have to be there for commercial use.
Also, this is a HUGE step up from the open subwoofer design that most, if not all, machines used in the past. You need special open air subwoofers for application like that and those are not cheap.I hope that explains my thoughts on this! I am definitely going to work on improving the design for my next adventure.
--Scott
I've built several boxes over the years and tried building ported boxes, but I was never happy with the results. Yes - you do get more volume output as the rearward movement of the woofer is able to bounce sound waves off of the back of the box and through the port. But the port tends to over-emphasize certain frequencies and it's really hard to get flat response. It also allows the sub to move more freely, but this translates into less precision - ie muddy bass.
You are correct - metal screens do inhibit air movement and reduce overall output.
Maybe the solution isn't one size fits all - you could have a free air boxless woofer with a screen as the standard option (same thing we've had in pinball for 40 years) and offer an add on option for a no-screen, boxed woofer for a small upcharge. I know I would be fine with a 100-200 upgrade charge for better bass. You could pre-build the box/woofers (and seal them with caulk) and it would be simple for spooky to drop one in as an option.
4 months later
Quoted from rai:What is PHP?
What ever happened with RZ? Did they make the full production run? How many pins was that?
He meant HHP - Haunted House Party, ie Danesi game #2.
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