Saturday, October 12, 2019

Ported enclosure... WORKS!

So 20 hours later and a little assembly and I've got a kicking speaker.  My little 2" speakers I use on my computer are pretty loud and a little bassy, but nothing like this.  I'm so happy with the results that I published it on thingiverse so anyone can make one:
https://www.thingiverse.com/thing:3912736

Video showing the speaker vibrating
https://youtu.be/waviRdexpMg



Friday, October 11, 2019

speakers came

So my initial impression of the 3" speakers I bought.. even without an enclosure equally or better than the bookshelf speakers I use on my computer.  I hooked up the same amp I use for my computer to one of the bare speakers and it was quite loud and good sound.  I put it in a cup so it has some back pressure, cranked down the treble a bit and the speaker definitely moves quite a bit when it has some bass thrown at it.  I'm going to try to 3d print at least one enclosure this weekend to see if it makes a big difference in the sound.  I'm almost wishing I had bought a 3rd to turn one into a bass only speaker (the LEPY amp is a 2.1 channel so it does have a bass output on it).  I might try it in each output to see if there's any difference.

I've grown up always thinking bigger is better (and if you want true air moving bass in a car that's still true), but for a pinball I think even small speakers can deliver pretty good sound if they are enclosed properly.  We shall see.

Wednesday, October 9, 2019

speakers ordered

So after watching this video of a 1.5" speaker putting out crazy sound by 3d printing a fluted enclosure: https://youtu.be/uujaBjf3Uwg

And this video using a 3" speaker and a 3d printed case:
https://youtu.be/4_4tu4rAtgI

I decided to order a pair of these mid-range speakers: https://www.parts-express.com/grs-3fr-4-full-range-3-speaker-driver-4-ohm--292-436

And I'm going to design my own enclosure from scratch.  I know ideally there is math and calculations for optimizing sound, but I believe that this design in general helps to direct the airflow and allow the soundwaves to bounce around to increase volume and waveform range.  Look at any bose speaker, they all use this design.
Right now the main case above is an 18 hour print job each.  I'm going to add threaded brass inserts where the holes are, and 3d print sides to close it all up.  I may add some channel features to really seal everything up.


Friday, October 4, 2019

more parts, configuring computer

Computer had a clean install but I wanted to ditch the mechanical hard drive.. Finding an ISO isn't going to help because OEM keys don't work that way. Tried to create a backup image to a usb hard drive, wouldn't boot from it.  Got fed up and installed tiny7 directly through the dvd drive.  No drivers, but struggled to get them installed.. then after ALL that I realized tiny7 is 32-bit not 64bit.  So finally my solution was to find a free cloning program that would at least make a mirror of what's on the mechanical drive over to the SSD.  Case is fairly quiet, I'm guessing if it were inside a pinball cabinet with the glass on you wouldn't even hear it, but I may look into replacing the CPU fan with a noctua fan.


Very clean, no scratches or dents, very impressed.

Grabbed a wireless keyboard/mouse $12 amazon, a wifi dongle $5 on ebay, $14 audio amp on ebay.  Still need speakers and probably going to go with a pair of these for the backbox:
https://www.parts-express.com/grs-3fr-4-full-range-3-speaker-driver-4-ohm--292-436#lblProductDetails



But I really want some bass, so I may try 3d printing a subwoofer box:
https://www.thingiverse.com/thing:3851805


Got Python and mission pinball installed.  Tried downloading the demo_man sample.  It would run the code, but the media control window (DMD) opens up then closes itself.. I even added the capital -X at the end (so it runs as simulation not a real pinball).  I feel like I'm following the tutorial to the T and already I'm hitting a roadblock.  I really need to see an example running so I know it's capability.