OO1

the Original K77 diaphragm was made by EV --Electrovoice --all new diaphragms are aftermarkets from Asia --whether 5$ or100$ - any used K77 that was not repaired with an aftermarket diaphragm would have the original EV diaphragm -

right , check the AA network configuration for the Squawker , this is the best for the PD5VH -

MINI DSP , it is very quiet -

your older diaphragm was actually better quality , they had Beryllium leads to handle higher power , the newer diaphragms are all Phenolic aftermarket --China-PH since EV no longer manufactures them and the leads are the weak point leading to frying of the voice coil - plus you want to check the DCR on the tweeter that is still operational , the DCR of the aftermarket diaphragms is 6.2 Ohms -

no way , a FH1 sounds like a LS , it's much bigger , so no wonder the AL-3 is not suited - and the problem is not the PD5VH , either , it's used in the LS5 and the AK6 and there is no hole anywhere fore or aft -you need , an Active crossover setup -

ok

no contest is right ------it blows it away - the chorus is a fantastic speaker

looks like you and @dirtmudd are 2 great chefs--

yeah -------anyone in Columbus OHIO ----can pick these up -------please get back to me tx

these Belles are -------consecutive serials number ---1976 ---red oak -oiled - if you have a tag at the rear of the speaker , please post a picture or -----write what you see on the tag

-- Classical Lascala --Raw birch , the picture does not do them any justice , tops need a light sanding --but , the cabinets are in overall good condition , badges

welcome to the forum - we can shorten the trip for you , if you find something , leave us a shout , you never know if a forum member can help you hike the speakers up the road , you pay for it , a member holds it for you , until you can make it up there , or they hitch it closer to your location , it's called the PONY EXPRESS -

Beautiful --

Mars ---1st photo

The SpaceX Falcon 9 rocket carrying the Sentinel-6 Michael Freilich spacecraft lifts off from Space Launch Complex 4 at Vandenberg Air Force Base in California, Nov. 21, 2020.

wherever you can find Cornwalls for 900$ or under ----------buy them ASAP

it would seem that not all AL networks came with Zener diodes , as they are expensive they are however important to add with the K77

there is no such thing as a Crites Titanium tweeter , on the Lascala industrial , these are k77 with a phenolic diaphragm , not a titanium diaphragm , and the date shown on the tweeter is the original EV diaphragm for the K77 with the installation date in1987 , and this is a very good diaphragm , most likely , the capacitors are worn out , or you overdrove the speakers with very high peaks , or the Zener diodes are defective -

the red arrow shows Zener Diodes , these are used to protect the Tweeter K77 in your 87 Lascala Industrial speakers , make sure to test the Diodes and replace them if 1 or 2 of the diodes are defective , otherwise , you will be blowing tweeters non-stop - the type AL Crossover is not liked by some , but you can still get replacement capacitors from @JEM Performance who sell the klipsch OEM Capacitors , https://jemperformanceaudio.com/

mamma mia ---

@wuzzer stated that the Klipsch capacitors sounded better than Sonicaps in Heresy speakers with solder lug k55V -

@Bosco-d-gama last log in was February 23 rd -

A year Ago , @Rudy81 was the First Reported case of Covid on the Forum --

he seems to be opting for this woofer ---pretty good specs ---great price https://www.parts-express.com/Dayton-Audio-PA310-8-12-Pro-Woofer-295-032