Latest SFI project, did it in about 6 hours tonight, half hour for the initial cup making earlier. I was too lazy to use the lathe so truly they are pucks. Look heavy but they are 3+ year old alder, and each cup weighs the same as an SFI driver itself believe it or not so overall fairly light completed. Alder is easy to work with, super light, strong and great for furniture making and obviously a good candidate for cups.
Only 2 coats ( or was it 3? ) of water based Acrylic Polyurethane, didn't want the high gloss 7 coat thing, and that got the project done tonight.
And bass, there's bass. PHEW~!
Pads from my Superlux 662F which p me off because they are not that soft, way too firm so new ones coming that are slightly low profile and softer. These bother my jaw even when they were on the Superlux. Terrible pads I'm surprised nobody else has mentioned this before in the Superlux Express Train thread. No More Nails double sided mounting tape.
Headband and coiled cable from an old Philips 70's can pretty rare but oh well. Had to open them up and resolder to replace the faulty headband cabling after it was all good to go or so I thought. I guess that the original cans were ok then. Oh well again. That headband cabling came from a Sansui SS20.
I used a drill bit to make a 35mm hole to the depth, extended that a bit further in the middle with a regular drill bit, then angled a 38mm drill bit about 12-15 degrees to create a lip for the driver to sit on a slight angle.
Used a small disc of super dense felt in the bottoms, with a tiny bass vent ( less than 1/8 inch ) that exits at the bottom rather than looking bad on the backside of the cup ( see pic with coiled cable entering cup, it's right there beside it ). That felt is worth getting it came from a velcro-attached polishing pad ( auto store or hardware store ) just slice off the attached velcro part.
Mounted the driver with a thin strip of putty at the angled lip and also applied putty in the space where the driver tabs sit. I'll fill all the seams tomorrow with more.
Deoxit on the inside and outside of the TRS plug.
Autosol metal polish on the chrome.
Thick and long chrome computer fan screws for mounting points
Came out ok considering it went so fast with the build.
Once again these pads...horrible comfort.
New Superlux replacement pads on fleabay are softer and slightly lower so that's the only tweaking needed, which after the Hackamichi ordeal is a welcome thing.
Done at first attempt. Pays to think ahead I finally learned