Altec 2 Way Build ala JELabs - 802/32/414

Thought I’d add my latest experience with my 807/32c/414z OB(open back more so that open baffle).
I’ve been playing with the Joe Roberts idea of a single cap(capacitance) croSS over with the 414 wide open. I started with a 5uf PIO motor run and have slowly worked my way larger (lower crossover fq).

I have a 6.7uf (2950 hz) and a 7.9uf (2550hz) that I can swap between. At 2950, I have a wide, detailed sound stage that isn’t quite ”in the room“. The 414z still seems to dominate...which I like.
At 2550, the horns start to over power the 414. The details are still there, but the sound stage is more center focused and ”in the room“.
Next step was to hit somewhere in between. I put together a 7.2uf (2750hz) and have been blown away since first listened. I’ve been hearing things in familiar songs that I haven’t noticed before...like the guy in the background playing a tambourine.

I can live with this, but have some ideas to “fine” tweak it.
 

Thermionics

Post Whore In Training
Was finally able to finish the cabinets up (remount the legs / veneer the cabinets) and I think they turned out pretty well. Hopefully this will be the last mucking about I have to do with these speakers and I can just enjoy listening to them. Oh yeah, and I replaced the pushed-in dust-caps as well (probably the most nerve-racking part of the whole operation). With the grilles, I don't have to worry about inquisitive puppy noses any more.

20210913_015006574_iOS.jpg

(that's quarter-cut Burma teak veneer with 4 coats of tung oil - was trying to get a better match to the console which is old-growth teak veneer circa 1960-something)
 

marantzfan

Administrator
Staff member
Those look fantastic. Glad to see you got this project over the finish line and met the required design specifications. I’m often a bit obtuse on the second criteria… ;)
 

Thermionics

Post Whore In Training
They look mighty fine.
Those look fantastic. Glad to see you got this project over the finish line and met the required design specifications. I’m often a bit obtuse on the second criteria… ;)
Thanks, guys! I think I successfully captured the MCM look I was trying for with this. Thankfully, no cats (allergic), so no worries about the grille cloth getting scratched up.
 
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