Building my new Speakers - Cutting out the Driver Holes and Recesses 

I agree with your tests, but if one perfected every detail of a speaker, one gets great sound. Bigger speakers dont sound as good as small speakers. Your test with speaker panel vibrations is with mediocre speakers. Instrument tests dont prove a goos speaker. Transmission line speakers play considerably louder than other speakers, & dont have to be big. PCM transmission line bookshelfs are the world's best speakers, in these speakers, carpet on the walls at certain locations make a big difference, but one cant tell the difference in mediocre speakers. You are using mediocre speakers that cant tell the differnce. Small upgrades, one cant tell the difference, but with piles of upgrades one can tell the difference. Do you use the best first order crossovers, or use no crossovers. Your speaker drivers are in my Sonus Faber Concerto speakers with the paper woofer type I have. The later ones like mine use not paper woofers, but were almost as good. My Concertos are the world's best speakers. The Sonus after mine they changed the same size cabinet that wasnt nowhere as good as my speakers. The speakers use a special bracing, special wood dried slowly 2 years in a dry kiln that made pores in the wood to cut vibration to make these speakers especially clear.. Expensive Totem bookshelfs use the same drivers as mine, but dont sound close to mine. My speakers use special resin inside the cabinets like a Strativarious violin does. My speakers are made in Italy by the best craftmen. Harbeth speakers are made to vibrate on purpose, but Harbeth has a patent on their low tone woofer rubber material. A $20,000 dac, great interconnects, A Krell amp makes a difference. Wall reflections are not a good way to test a speaker cabinet, but it is a good idea. I am leaving you a link on great interconnects. And a link in $200 PSB speakers that are much better & less harsher because of the woofer material than your higher price speakers you bought. These speakers are better than $1,000 B & W's speakers. The speakers were stereophile speakers of the year for 2 years, over $100,000 speakers & are often on ebay cheap & sold 1 million pairs of these speakers that wer discontinued last year, but sold for 20 years. Canada furnishes Paul Barton Of PSB speakers, a $1 billion sound room for testing for free, The US government furnishes nothing. . Buy only PSB Alpha B1 speakers. Andrew Jones speakers are terrible against these PSB speakers. Here are great dirt cheap interconnects. Click links. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Q6Pl12DeGUw.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-_P2umDQWA4g.html ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-EjXS7Byg-xE.html www.morrowaudio.com/ If you want the best speaker in the world, get the $700 Magnepan's with this upgrade, but you must have an expensive amp like a Krell amp. This guy talks about Magnepans a lot.. Click next link. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-cLdlZ5bJXIY.html

Just 7 minutes? You've got to play it on 0.5x speed to get all their is to know out of this gem!

I go by the engineering drawings on scrap, then adjust as needed. The drawings don't always give you the proper numbers for "cut your circle here". So using lots of scrap really helps me. But the drawings seem right-on about 95% of the time.

The centre to centre driver placement is crucial (closer is better), but in general placement is usually a aesthetic choice rather than a sound quality one. If diffraction is a concern, offsetting the tweeter can make an difference, but it's highly disputable whether diffraction is audible while playing music and therefore it's effect on sound quality is also in question.

I second that!!

Thanks. There will be details on that in the next video.