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KLH Model One(s) and Janszen 1-30(s)

Discussion in 'Speakers' started by RxDx, Dec 21, 2015.

  1. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    I'm in your boat, with the 'bigger is better' speaker thing. The speakers I drag home are getting bigger & bigger on each haul. My wife is constantly giving me the look of doom. Luckily, she understands that I could be doing a lot worse with my free time than listening to music.
     

     

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  2. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    Thank you for the compliments! I've always been fascinated by the first three
    models, which was only made worse by their scarcity. Yes, I would like to go
    all the way on these. Not thrilled about the black paint on top of the original
    finish. I suspect it was to hide some prior damage.

    I need to revise my KLH listing re: into dates for these beasts. Also, I believe they
    did eventually go to the expoxied drivers for the One, Two, and Three. That had
    to be seriously cheaper than the original woofers like in these two. I'm going to have
    to pull the cloth off one of these. I've never seen the unit bare.

    The Janszens are... 5380 (finished) and 5082 (black). I'm still looking for a little
    more thorough description of how to fix these things before I break them down.
    I will probably start another thread on their repair.
     
  3. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    That's for sure. In my situation, it really helps that all the activity occurs on
    a separate floor.
     
  4. stormking

    stormking Active Member

    Messages:
    189
    If you look up (vintage vacuum magazine) on a net search they have pdf's of original 1950's stereo magazines . High Fidelity June 1957 (pg 28) has an ad for the new model one. Its a drawing, but shows a riser base that must not have made it into production. I'm looking forward to your repair thread.
     
  5. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    Yep, nope. The next month's issue shows the One sans base.
    And, of course, serial no. 002 above doesn't have it.

    klh1.jpg

    klh2.jpg
     
    sberger likes this.
  6. GD70

    GD70 AK Subscriber Subscriber

    Messages:
    14,281
    Location:
    Northern Westchester Co, NY
    Pretty cool! Love seeing vintage ads of our gear.
     

     

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  7. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    Me too.

    Here are several on the early AR and KLH.

    1960 Radio Shack:

    [​IMG]
     
  8. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    Anyone know if any other speakers used the same tweeters from the klh model five, tweeter array? I have one 'stat & one klh array. I figured I could build a matching five array pretty easily...just gotta find some tweeters. I'd go with newer drivers but I wouldn't know where to begin with selection (not my expertise).
     
  9. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    I'd like to see inside an original Five, because I have no clue what
    those drivers are. Otherwise, it's just about matching them. "The"
    chart says it has a midrange and two tweeters. The tweeters could
    be the GE unit used in the Four and original Six, but the mid might
    be unique to the Five (because it was only offered from '58-'60,
    before the screwed-in drivers of the later systems).

    klh1-2.jpg
     
  10. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    It's pretty cheesy inside :). They very clevery mounted the tweeters. I'll get some pics shortly.....
     
  11. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    The tweets were easy to get to. The mid will require a bit more elbow grease. It's proving to be resilient from removal.

    20160101_184255.jpg 20160101_184404.jpg
     
    sberger likes this.

     

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  12. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    World's first :) Pics nowhere else on the web

    So the tweeters were glued in up to the small part of the
    basket? They could be the GE unit, I guess...
     
    sberger likes this.
  13. hunter00

    hunter00 Super Member

    Messages:
    2,726
    Location:
    Mission b.c
    cool find for sure.I had a pair of the Janzens I-30 as well back in the early 2000s till I burned out the power supply for the electrostates
    be careful how much juice you pump into those units as tey were designed in the tube era.My mistake was running the 2 janzens on top of my AR9ès to supliment the top end but I drove them with a pair of bi amped HK citation 16a amps.too much juice fried the panels

    hunter
     
  14. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    I'd bet the whole system doesn't need too much juice to get going...I can see how one would think you'd need gazillions of watts with the size of the speakers :)
     
  15. hunter00

    hunter00 Super Member

    Messages:
    2,726
    Location:
    Mission b.c
    no Madmonda...a tube amp pushing 15-20 watts per channel will be lots with those,would love to put my fisher 50a mono blocks on those babies!!.There not as effient as bass reflex speakers ,ported cabinets but as long as your not trying to fill a stadium with sound in a normal size room 20 sweet vintage tube watts will do the trick.That a fairly rare setup you have there
    congrates
     
  16. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    15-20 tube watts is plenty! So, if you went SS with these, the SS amp should be a healthy one, right? Of course, like you've said, you wouldn't want to get carried away! I'd assume they like good current too.
     

     

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  17. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    The literature says the Janszens were matched to the KLHs, which I think means,
    among other things, that they were both seriously inefficient. AR2s are noticeably
    louder for the same volume setting, for instance. I can see how it would be easy
    to burn the 1-30s up, on top of AR1s or these KLHs.
     
  18. madmonda

    madmonda Active Member

    Messages:
    440
    Location:
    Maryland
    Oooohhhhhh....
     
  19. hunter00

    hunter00 Super Member

    Messages:
    2,726
    Location:
    Mission b.c
    Yes the janzens were sold with the KLH model ones and ment to sit ubove the front baffle in the enclosures.I looked for many yrs for a pair of the klh1s as I sourced the janszens first.They are relatively ineffiecent compared to later bass reflex designs but remember they were produced around 1960 and all there was at the time was tube amps available.
    The woofers in there will be rated at or around 30 wpc.Doesnt mean you cant feed them 100 wpc as long as your moderate with you volume pot.
    It would be a shame to over drive those components as the chance of finding replacements would be slim to none.
    Use them as intended.Get yourself a vintage HHscott,fisher,dynaco ect stereo tube amp of 15-40 wpc and call it a day that's what id do.I run 1958 era full range and co-axial speakers and with tubes they are extremely accurate and will fill a large room with sonic bliss.The x-overs will need recapping for sure..

    hunter
     
  20. RxDx

    RxDx Speaker collector Subscriber

    Messages:
    1,170
    Location:
    Virginia, the colonies
    I still don't know a lot about the Janszens yet. I'll get to them in a bit.
    But the woofers run straight- there are no inductors, caps or anything
    else in the cabinet. And I think they're like the ARs of the period-
    they're basically bulletproof. It's just not common to hear of anyone
    blowing an early AR woofer, or KLH for that matter. I ran the KLHs at
    a measured 120 db for a while the other day. All they did was get quite
    loud, quite effortlessly, though that much sound is not the norm for me.

    I wouldn't mind a good tube unit. It's just not high on the list. I'm basically
    happy with the main amp (Onkyo M504, driven by an Integra DTR-30.1)
     
    Last edited: Jan 2, 2016

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