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Active experience? Only active with a stock 4430 with the passive MF/HF equalization intact and 5325 4430/4435 cards.
Matching response curves and amplitude levels was fairly critical for the most...

This is what you would see initially, for those interested (not an endorsement or recommendation):

88717

Perhaps you can elaborate.

Private Japanese Vintage Altec fan page? Did you join? Was it worthwhile? ...

In the future, it might be be helpful to at least minimally describe rather...

are you clicking on the little ‘Remember Me’ box next to the login fields?

fiberglass? Cheap, readily available, works well and doesn't deteriorate. Used effectively in ported (open?) systems for ages. Could staple cheesecloth over it if there is a concern.

Re...

Cool to maintain that legacy system! Some folks really go for that kind of grill cloth too.

Pictures are always appreciated. Personally, if I can learn something it's all good :)

You'll likely...

Well, this thread has had some interesting moments.

When the Everest cabs eventually came into the picture, I thought ... cool, just build some Everests with 2216s a Radian BE and adjust to the...

Here's a bit of somewhat related reading fun:

http://www.princeton.edu/3D3A/MediaCoverage.html

Looks a bit like Altec boxes such as the Carmel (quite possibly DIY) with a JBL load.

I'll give it a go :)

There are two channels (L and R) brought to the six single conductor banana jacks:

Left and Right channels are grouped in the two horizontal rows (of three jacks).
The...

There was someone selling an equivalent item (as stated by the seller) on ebay at one time (?) or perhaps contact member Edgewound for one of his.

Personally, i’d leave the hole alone and not worry about it.
re alignment, if the adhesive is now completely ineffective, you could try thin, double sided tape... A sweep test will bring out any...

I remember :D
kinda quirky, but a nice option.

Yes, same lack of ribs on the aquaplassed 4" dias. I bet they tried it. Probably dampened the upper freq tizz that the stiffened/ribbed diaphragms added to measurable and noticable effect, so why...

JBL did put aquaplas on these Ti domes... LSR32 and 28. 053Ti ... don't know if that was instead of, or in addition to foam. :dont-know:

Also, the residual adhesive on the 'plinth' is sufficient...

Nice. You can see how squishy the foam is. Lots of good info!

Congrats Grandpa Ken! :)

Sounds like a good plan. A few mm of 'squish' is probably safe, vs more for the original. But not being able to compare makes being conservative a likely wise move. Don't want to deform/damage the...

What happens behind the grille cloth, stays behind the grille cloth? ;) Good luck with that here.

I seem to recall Greg (at one point) had his system set up with 4 separate amps (one OEM/Pascal...

Straightforward layout, no nonsense, and a beefy power supply. Those switches are serviceable as well.
Haven't heard one (or if I have, it was long enough ago that I can't count it), but I expect...

Wondering about 2216Nd as a current/serviceable replacement, possibly an improvement... seems like someone may have tried this in an L300 (not far off).

I think Mike meant a filter to block the lowest frequencies, ... a high-pass filter (on preamps there used to be a 'rumble' filter so turntables wouldn't feedback or put undue/inaudible LF into the...

A few things... 2231 recone kits have been unavailable for quite some time. The suggested factory replacement (2235) kits -may- also now be unavailable... Perhaps you'll get lucky in either being...

That should be fine. The charcoal pick&pluck foam from the same vendor might be worth checking too (nice sized chunks pre-scored). Whatever is used should compress -very- easily. The foam plug that...

tape, sticky side out, on a stiff piece of plastic... e.g., part of an old credit card.
new tape, clean gap, inspect gap and tape, repeat until clean.

You don't want to add any abrasive or metal...

I assumed they were what triggered the question. Cat's out of the bag now. Have to pull the drivers to know for sure, but they look pretty clean other than paint and the inevitable goop drip.