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    Dreaming for sure.

    The only ones of value are the 075's but they go for $100~150 ea,. Maybe a little more since they seam to be NOS.
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    Yes, internert for a telephone, or any other audio transmission.

    In the radio industry IP based technology is taking over. We get remote sports feeds from all over the country using IP based remote units. Comrex Access is what we use. I can even log into them...
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    Voice over IP is becoming the norm.

    In general I don't like Voice over IP, But I'm stuck with it, it comes down to bandwidth. I do use VOIP but on studio grade units that cost about $3K and the ACC encoded is the standard one to use. ...
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    The 2205 has a more complient surron.

    JBL designed the 4520/30 and they used the best driver they had at the time AKA 2205. When the 2225 came it was used.
    In one system I made I used 2226 in 4530 scopes and the bass was stunning.
    A...
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    Do you have any idea how much music and movies are made on Mac's?

    Mac is the music industry standard! Many movies are produced on Mac's.
    Since I work at radio station I deal with all this time. Though we do use wave files for on air, all most all of the audio we...
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    The advantage of unbalanced is in long cable runs.

    With unbalanced you the common mode rejection of interference signals along the cable.
    This makes the balanced cable less prone to outside interference.
    The Amp needs 1.3V for full power, it will...
  7. That was trip down memory lane.

    I remember most of the items shown, guess this make me an old fart.;)
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    Just replace the caps.

    The electrolytic caps will go bad over time and should he replaced. If the L pad is "scratchy" or has bad spots replace it. The inductors are fine. the resistors should be OK as they are wire wound.
  9. Thread: Doctor Who

    by jcrobso
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    Opps, sorry!

    But that was last June! :(
    I didn't say who River was, thought.;)
  10. Thread: Doctor Who

    by jcrobso
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    13,325

    Opps, sorry!

    But that was last June! :(
  11. Thread: Doctor Who

    by jcrobso
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    13,325

    Been watching for years as have most of you.

    It seems that most started watching when Tom Baker was the Doctor on PBS. My PBS station then went back and ran some of the previous Doctors.
    After Tom Baker the BBC then switched producers for the...
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    Happy birthday TD!

    Hope you enjoyed the day!!:bouncy:
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    You can print them with a 3D printer!

    http://www.youtube.com/watch?v=jQ-aWFYT_SU&feature=related

    Watch the link, just scan your horn into the PC and print!:eek:
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    Happy birthday!!!

    I hope you enjoyed the day1:bouncy: I was 60 once.;)
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    I'm not sure why you want to change tihs?

    The inductor has a tap on it, JBL used this inductor as an auto transformer to lower the signal to the mid range driver. I'm not sure why they did this, maybe so they wound be dissipating less power...
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    Happy birthday John, hope you enjoy the day!!

    I'm glad to know that I'm not the only 66 year old here;)
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    I uesed 2226 in the 4520 that used for Church sub.

    If you can get USA made 2226 they might do a better job.
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    I got some moving dollies at Menards.

    They were on sale for $19.00
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    Beyma speaker are very good, I have used them as JBL replacements.

    Beyma makes a 12" guitar speaker that is a replacement for the JBL E120.
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    12" JBL speakera that are good for PA

    About the only ones that will stand up are the JBL guitar speakers, D120F, K120 or E120.
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    Yes, there is nothing worse the crap in the gap.

    Loose things floating around are no fun!:crying:
  22. Very nice!

    Looks like you had good time!:applaud:
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    I play Bass & Guitar.

    I started at age 14, but I did play Piano and Trumpet before that.
    I still play but bass at Church.
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    4520 big box, but great bass

    I used a pair of 4520s for a Church sound system as subs, loaded them 2226s and crossed them over at 100HZ if I remember correctly. I could shake the whole room with them.
    If you want to use 12'...
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    And the war rages on.

    FYI: The term RMS applies to a pure sine way ONLY and nothing else. RMS voltage is derived by taking the positive swing of the sine wave and taking the peak voltage of the sine way and multiplying it...
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