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Posts posted by JohnA

  1. 2 hours ago, KT88 said:


    Ok, then I don't know why EV recommends it the way they do. After all, when removing the horn, someone has the freedom to listen to the horn in vertical and horizontal orientation comparatively. I've also seen installations of the T35 without a baffle at all, but then I would suspect that the sound pressure might drop off at the lower crossover frequency. 

    Marvel, thank you for your objection, I am writing to help others and not to be necessarily right.


    If you look at earlier E-V data sheets, you'll find a dispersion graph.  Though you are correct that the T-35 is a diffraction horn, it's dispersion is wider above 6k Hz with mounted horizontally. 



  2. Listening through my headphones, I hear a crackling that often indicates amplifier clipping (over-driving).  Your description of flub, flub, that i don't hear, could describe "port chuffing".  While normal, it *is* undesirable.  Your Cornwalls were not built with the massive lows special effects contain, so it it is port chuffing, all you can do is reduce the bass boost or the volume.  That will also reduce amp clipping.  If you have the bass boosted, reduce that the move them closer to corners and the walls to help recover that bass output. 


    It's easy enough to remove the backs and inspect the woofers.  If they are damaged, replacements are readily available and also recone kits. 

  3. You have what we have coined a Heresy 1.5, made in 1984.  They have Heresy II squawkers and are transition models.  About that time, the AlNiCo K-55-Vs became difficult to get, so Klipsch moved to ferrite drivers in all models.  "HBO" appears to mean Heresy, Black Oak.  The woofer may be a K-22-R.  Made by Rola Company. 

    • Like 1
  4. 21 hours ago, mrparisi said:

    I used bass box to do my calculations. You..,...




    I use BassBox as well.  Then you know you can't drop in different drivers in to a completed box.  If you find another driver that's more efficient, it won't go as deep, if it works in your box.  It sounds like you have a calibration error or a lack of power, or both.  


    As to some recordings sounding thin, ..... the artist may have meant it that way.  That's why I don't mess with mine and are particular about the recording.   

  5. The KA-8300 is a good 2 channel amp.  I had Kenwood integrateds in college, wish I'd kept them.  It deserves a nice pair of speakers and its own room.  Trying to hook all you have to it is possible, if you keep a gentle hand on the throttle (the combined impedance may be a little low), but the results may not be impressive; all channel stereo. 


    You have the makings of a neat home theater setup.  I'd get a theater receiver, use the 2.2 as the center, the KG2s as front L&R and the 2.1s (actually 1.2s?) as rear L&R.  My rear speaker stands are shaker style rubber tree wood I finished.  You ought to have an outboard power amp for the passive subwoofer and let the theater receiver handle the crossover. 


    For instance:





    img1 (1).jpg

  6. There is little to be gained by biamping Heresies.  Modifying the cabinets and crossovers to separate the the woofer from the HF would stop me. 


    However, if bridged for mono, their approximately 100 watts each will be a perfect match for your vintage Heresies.  Heresies protect their tweeters very well.  Dinna fash a whit about your tweeters.  I'll recommend placing the speakers in or near a corner to boost the bass output so you're not tempted to turn up the bass knob and put your woofers at some risk.  

  7. 19 hours ago, OO1 said:

    the cone of the k-33 was softer , and it could  dig deeper ,  the k-43 had a  harder cone  which did not  allow it to dig as low ,   the issue of having 2    new k-33-E has better bass + higher  power handling   

    The softness (stiffness?) of the cone has no bearing on the resonance or LF capability of a woofer. 


  8. I have 4 VMPS Larger Subs (92 dB/w/m) driven by 2 Acurus A-250 amps (300 to 350 wpc) in the corners.  That keeps up with my La Scalas and Heresies nicely, without noticable distortion.  


    The drivers must be mated to the cabinet volume and tuning.  Don't substitute other drivers in a completed cabinet.  K-33s and K-34s are not great sub drivers.  Choose others that are better at it. 


    Certainly add power. 


    Get an SPL meter with a known calibration or software (REW?) to set your sub levels and leave them alone.  Different recording have different bass levels and that is part of making great music. 

    • Like 1
  9. In a La Scala, the K-43 is an excellent choice and WILL NOT produce less bass.  Actually, it is a dB or 2 louder.  Since the La Scala bass horn is short, the K-43 goes as deep as a K-33.  In the longer Klipschorn bass horn, a K-43 gives up a little low bass, but not enough for me to pay to change them were my Khorns equipped with K-43s. 

  10. 8 hours ago, AnnieP said:

    I have a pair of Heresy HBR speakers

    The sticker on the back is handwritten and the serial number is 137X443

    Inspected and checked by

    Judy Purtle

    Mark Black

    Can anyone give me any info please?

    Are they worth anything?


    X is 1982.  If the squawker (midrange) driver has soldered terminals (likely it does), you have one of the best sounding Heresy Is. 


    Since they are Birch, Raw, expect $300 to $600 depending on actual condition and where you live. 

  11. On 9/7/2022 at 2:47 PM, Gregavi said:

    Thanks JRH. I assume the 1st 2 digits indicate the year. What do the other 5 digits indicate?


    We forum nerds have informally called '84 and '85 models Heresy 1.5s.  They were transition years between Heresy and Heresy II.  They have HII squawkers and HI woofer/tweeters and a matching crossover.

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