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    Knowledge much like more Wattage is a good thing

    Alright Gentlemen, be kind! In the last 20 years starting out as a novice I only consider myself more seasoned these days. Definitely not an expert. I will continue to push my imagination, and try...
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    A new twist to the ADCOM ACE-515 AC Enhancer

    The ADCOM ACE-515 AC Enhancer is a very interesting piece of gear. This year my wife turned on and off all our Christmas lights with her cell phone when I used Bluetooth controllable 120V adapters...
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    No need to reinvent the wheel. RJ is the best in the business!

    Look on Ebay. Auction 266458406102 Sign Shop is awesome in the most exact reproductions.
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    The media room serves double duty for both movies...

    The media room serves double duty for both movies and music. Surround sound is all in wall with the exception of the subs. I spent a lot of time fooling with the surround only to determine there is...
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    B460 After pictures

    Here are a couple pictures of the damaged areas after repairs
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    B460 Before

    The second B460 is all original and was in reasonable shape and a great deal when I found it. About the same price as the previous, so I could afford to spend a bit on shipping. Purchased out of...
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    B460 Updates

    Boy how time flies, Two houses later, 3 grandchildren, and almost retired, These have been in my media room for about a year now. I never built the mirror image mate but acquired another...
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    Glad to see they have a good home

    Feel free to pm me for any questions!
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    4350 Charge Coupled Schematic

    Does anyone have the schematic for a 4350 or 55 Charge coupled network they can share?

    Thanks

    MB
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    You will probably have to scale the circle from...

    You will probably have to scale the circle from the drawing. I have had several sets but no longer own any. The outer walnut trim is about 1/8 thicker than the L100.

    As always Great work !!
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    L-100’s from a sows ear to a silk purse !!

    It all started after hearing a set of 4313B studio monitors. These little 10 inch wonders sound absolutely awesome! Sooooo Why do the bigger L100’s sound so lacking by comparison? There must be a...
  12. I think they are Mylar

    I did not look very closely when I rebuilt the 212 crossovers in the links above. But my opinion is that JBL purchased these in bulk and that they were probally not of high quality but were of good...
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    Help with charge coupled design

    Has anyone put out a diagram for a charge coupled crossover at 500 and 7000 hz? Or can someone note the mods to the Charge coupled l-300 crossover to change it to 500 and 700hz. I am proficient...
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    I agree with Sweet212

    It is most likely Caps, however dont forget the amp is only about 75 watts, and from my experience for a sub to work well it usually needs several hundred watts to sound good. I think the bass...
  15. I have owned 4 sets of L-300's and FWIW none of...

    I have owned 4 sets of L-300's and FWIW none of the sets has had the fiberglass in the bottom. Not sure why? Even so I never felt the need to add it.

    MB
  16. What does the number 50320 mean on the back of the woofer cone?

    An e-bay seller is selling D-130's and says they are reconed as 136's The number on the back of teh cone is 50320. Is this enough to know if it is a 136 cone?

    Thanks
  17. Last I pour in the wax to seal the top. Not bad...

    Last I pour in the wax to seal the top. Not bad for my first attempt at this. I think the final results look pretty good.

    I’m not sure but does this qualify as OCD behavior?
  18. Time to add the sand before getting ready to...

    Time to add the sand before getting ready to install the new wax seals
  19. Now all the caps are installed except one. I am...

    Now all the caps are installed except one. I am waiting on the back ordered replacement which consists of two caps to get the right value. I have to use a 15uf and 1.5uf in parallel to get to...
  20. Here I remove the old cap and solder in the new...

    Here I remove the old cap and solder in the new ones. Before installing the new caps in the cardboard tube, I have to melt the wax that is in the bottom so they will fully seat. I used a SMD air...
  21. Here is a picture of the old cap next to the new...

    Here is a picture of the old cap next to the new cap.
  22. Once the wax was removed, I found a generic cap’s...

    Once the wax was removed, I found a generic cap’s surrounded by sand. Some of the caps were totally encapsulated in wax. The ones in wax were harder to remove so I installed a sheetrock screw, and...
  23. The first challenge was to remove the wax tops...

    The first challenge was to remove the wax tops and see what James had hidden in the cardboard sleeves.
  24. Recap your crossovers; Keep that factory look and feel

    I am starting the recap process for a pair of L212 crossovers. Just thought I would share the process with the forum. Since the back comes off of these I want to keep them looking as factory as...
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    Not at this point. We will be experimenting with...

    Not at this point. We will be experimenting with a passive LF bandpass filter to see what difference that makes. Any suggestions?
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