Final setup. Looks nice enought to me to not need to be hidden with speaker cloth, I'll add it anyway.
I added 2mm foam on all inner sides of the shelf to prevent potential rattling. Zero wasted space (to tight it took >5min of pushing to get them squeezed in).
One of the trial ported fronts came out better than the flush so I used that on and filled in the port holes, made them a different color so it looks intentional =P
I added 2mm foam on all inner sides of the shelf to prevent potential rattling. Zero wasted space (to tight it took >5min of pushing to get them squeezed in).
One of the trial ported fronts came out better than the flush so I used that on and filled in the port holes, made them a different color so it looks intentional =P
I made a frame suction cupped to the shelves. My cats usually don't mess with stuff like this, but that woofer is very large and eye level for them.At last, we can fully visualise your project - and it looks pretty darned good too! 😎
I wouldn't want to hide that classic look permanently behind speaker cloth. I presume you will make removable cloth covered grills?
It's ugly, miss measured something as it's 1/2" too wide but temporary and very removable.
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Cover Lasted 29 days til it got peed on. Unless I think of a better solution that woofer is going to happen moved up and be parallel to the mid and Tweeter. Once something gets peed on it will keep getting peed onNice cat proofing, and I like the way the drivers are still visible behind the covers. 👍
this cat "spray" on things on the floor that makes annoying noises or vibrations (like the vacumn cleaner, air purifier, my tower pc after I added a loud twin fan video card). He's never shown interest in speakers but I knew there was a chance a bassy 12" woofer might be a trigger.FYI/FWIW/YMMV; 'been there, done that' with cats and found that adding a glass cleaner (water mist) pump sprayer to a bottle of 3% hydrogen peroxide to spray such areas or disinfect most anything has worked great for me and one of my most useful 'el cheapo' 'tweaks' ever.
Enzyme cleaner will safely un-scent most things. Ill give it more time but its probably not a one time thing.
Well, I didn't spray them if that's what you mean, though the lingering 'antiseptic' smell did seem to act as a warning of sorts, but long term had to have them 'fixed' once we got the kittens we wanted.I presume that works as both 'deterrent' and 'detergent', GM?
...the click test...
I have been meaning to finish this and alert you to it. How does it look?

dave
Speaking of which.... recently it was pointed out to me that the 0.5 ohms I've listed all these years dates from when amps still had relatively low DF and other high resistance components (circa 1968) Vs today's super high DF amps, minimal XO losses, so guess some measurements need to be made of today's typical (DIY) speakers to find a more accurate default.
If you're using an external sub, then I'd just go for the sealed option and be done with it. Both ported and aperiodic can be a mess with tricky tuning, and I didn't find aperiodic bass to sound all that good anyway. Although there may be potential, so if you're willing to rework some holes and/or a grille covered with layers of compressed felt, then go for it. There may be some higher frequencies leaking out with uncontrolled phase, so use that to your advantage and put it at the back, opposite the speaker.Without getting too weird with the shape (back is a little taller than the front) I got 1.53 cu ft.
The original box 2.06cu ft, Tunning frequency 40hz. Fs is 138hz.
If I adjust the port to tune it to 50hz+ and 1.53cu ft. I have a pretty good idea of what happens bellow Fs (it's covered in detail in 100's subwoofer guides)
This is a full range woofer high end rolls off around 9khz.
How much will smaller enclosure, tuned higher affect the response graph from Fs and up (138hz-9khz).
Am I going to lose sensitivity and add spikes/dips in the response?
Or should I keep it at 1.35 ft³ with the aperiodic design you suggested?
the external subwoofer is handling <120hz, so the woofers low end response is getting mostly filtered... I don't want to get bogged trying to make a cross over for drivers with non-published specs like this one.
recently it was pointed out to me that the 0.5 ohms I've listed all these years dates from when amps still had relatively low DF
I was thinking about that after I posted last night.
Valve amplifiers rarely exceed a damping factor of 20, for which an Res of 0.5 ohm would be appropriate.
Transistor amplifiers usually exceed a damping factor of 40, for which an Res of 0.25 ohm would be appropriate.
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