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Industrial La Scalas info


dtr20
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I just picked up 5 industrial la scalas today and was hoping to get some info on when they are made. They have Type AA crossovers and below is a picture of the terminal plate with the serial number 2262. Thankse3c34daf31eb6cede0b8577079ac5024.jpg

 

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They came out of a family fun center that went out of business. They were hanging by chains from the ceiling for roughly 30 years. They need to be thoroughly cleaned first. We are listening to them now in the garage.00e179eca268c16066db4b342682f67d.jpg

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8 hours ago, dtr20 said:

 

I just picked up 5 industrial la scalas today and was hoping to get some info on when they are made. They have Type AA crossovers and below is a picture of the terminal plate with the serial number 2262. Thanks

 

since they  have sealed backs  , square cabs  early 80's  --1980-81 -82

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  • 2 weeks later...
On 8/31/2021 at 10:33 AM, JRH said:

#2262 shipped to PMA Engineering on 4/16/80, along with the next 7 serial numbers.  

Does it list a city and state that these were shipped to? Curious if these came directly to Massachusetts or if they came later.

 

Also, does it make sense that the some of the speakers have different midrange and tweeter drivers? Was thus a transition year for Klipsch with drivers? 

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On 9/11/2021 at 8:37 AM, dtr20 said:

Also, does it make sense that the some of the speakers have different midrange and tweeter drivers? Was thus a transition year for Klipsch with drivers? 

Pics of the drivers will help with your question.  But 79-80 time frame is when nud-magnet drivers began replacing the former AlNiCo magneted drivers, Mostly due to the severe drop in availability of cobalt, which was primarily due to apartheid sanctions going into effect against imports from South Africa!  So as the availibilty of cobalt diminished, iron slurry "mud" magnets began to replace AlNiCo magnets on drivers.  K-77 M replaced former K77, K55M replaced K55V.

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12 hours ago, HDBRbuilder said:

Pics of the drivers will help with your question.  But 79-80 time frame is when nud-magnet drivers began replacing the former AlNiCo magneted drivers, Mostly due to the severe drop in availability of cobalt, which was primarily due to apartheid sanctions going into effect against imports from South Africa!  So as the availibilty of cobalt diminished, iron slurry "mud" magnets began to replace AlNiCo magnets on drivers.  K-77 M replaced former K77, K55M replaced K55V.

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On 9/11/2021 at 9:37 AM, dtr20 said:

Does it list a city and state that these were shipped to? Curious if these came directly to Massachusetts or if they came later.

 

Also, does it make sense that the some of the speakers have different midrange and tweeter drivers? Was thus a transition year for Klipsch with drivers? 

like @HDBRbuilder  said , this is correct 79-80 was a transition year , but remember that quite a few of your speaker's drivers are  stamped R in RED which means Factory replacement drivers on Warranty or Exchanges -

 

imho-- when the replacement was sent out by klipsch , they could have sent out  Drivers  of either generation  if it was in Stock  , a k77 was a k77  whether it was the Alnico or the Ferrite and the same with a K55V whether single or dual phase plug - whatever was available , they shipped -

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