[Pictures of your vintage audio gear.]

Wow, classic look!

 

On 12/31/2021 at 3:45 PM, Fish said:

 

[Pictures of your vintage audio gear.]

Looks gorgeous!

 

On 11/28/2021 at 8:29 AM, henry4841 said:

We have a picture of your tube gear thread so not to discriminate I started this thread. The gear from the 70's just have a look you do not find in modern equipment. I did what I would call a complete restoration of this Sony receiver. Replaced all the electrolytic capacitors except one that checked fine that I did not have in stock. Forgive me but I did not want to combine 2 to make the correct value. Cleaned the pots and aligned. Did some repairs to the beautiful walnut case and it now sits in my bedroom. I had a Sony receiver in the 70's and in my opinion was one of the best looking ones ever made.  

 

[La Scala - Change of Woofer??]

Good to know, I'm about to build La Scala clone and was wondering the same thing!

 

On 1/6/2021 at 8:23 PM, RandyH said:

20 Hz is sub territory  for sure----- not even a woofer in a bass reflex cab speaker can go that low  ---------and definitely not in a Scala , it's the anti-bass speaker  , build a Cornwall , you might be more pleased ,

 

there is the K43  which is used in the LS Industrial , it has more mid bass , and  more power handling

 

[Dialing down the midrange in KLF 20s]

Thanks for the insight, mboxler!

 

 

On 1/10/2022 at 12:49 PM, mboxler said:

 

Hey Jon

 

The best way would be with a true rms multimeter.  I'd actually measure a few things...

 

Play a test tone, say 1000hz.  It doesn't have to be real loud, as you are just creating a voltage that can be measured.

 

Measure the voltage across taps 0-5 of the T7A autofomer (input).

 

Measure the voltage across taps 0-2 of the T7A autoformer (output).  This should measure around .316 times the voltage across taps 0-5, or -10db.

 

Measure the voltage across the wires connected to the squawker.  The difference between this voltage and the voltage across taps 0-2 is the attenuation created by the lpad.

 

If you are curious about the difference in db, you can enter the measurements here...

 

http://www.sengpielaudio.com/calculator-amplification.htm

 

I hope this is what you are after.

 

Mike
 

 

[Do you need a horn subwoofer for your Klipschorn/ Lascala home theater?]

Thanks for the info Tom05! 

 

 

21 hours ago, Tom05 said:

No , you do not. But that’s not to say that I have anything against going with a horn subwoofer either . The Klipschorn is a different animal when it comes to subwoofers ,  because it puts out arguably some of the best low bass available down to 40 hz or so ,and it does this with very high output . So what to do? Well I’ll tell you what you don’t want to do , don’t crossover your Klipschorn, at 90 hz 😳cause you just lost some of the best bass known to mankind. If you can crossover at 40 hz , much much better, but in my view the very best solution is to run the Klipschorn full range sending all LFE to left and right Klipschorn  and a duplicate pre out signal to your subwoofer setup . With this arrangement the subwoofer augments the low bass from the lowest frequency to where the Klipschorn naturally rolls off ,or a bit more if desired ( using the subwoofer variable crossover dial). A simple first or second order filter can be incorporated into the speakers at 20-30 hz or so , if your concerned about them not being able to handle the  LF . My experience is that they can handle full range no problem.  ( in a home theater application )This set up allows you to retain all the snap and slam that the K-horns give you (and quality). And to just simply add to the lowest octave that needs help. I’ve experimented with this stuff endlessly,and if you want the biggest slam try it . For reference I’m using 4 HSU tn1220 subs in one rear corner ,500 watts per sub.