Announcement

Collapse
No announcement yet.

ZX Spectrum: HiVi M6A + BG Neo3 PDRW

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Paul Carmody View Post
    So wait, you already have the Klipsch woofer and BG Neo3 hooked up and in a cabinet? If so, why do you need me? Seriously, though, if you're already that far along, you can just send me your project files and I'll help you out.
    Paul,

    I have to confess that I am not savy enough to run computer sims nor I have the measuring capability at home:( But I like to tweak and I can solder therefore I did the following things:

    K 6.5 is mounted in a 0.45 ft3 vented enclosure( 2 inch diameter rear vent 5 inches long). The baffle front is 10 inches wide. BG Neo 3 PDR is mounted on a separate baffle for now.

    Version 1 using Ron E's Krystal XO.

    Version 2 using your ZX Spectrum XO.

    The woofer low pass is kept the same.

    I believe the integration between woofer and tweeter needs some work. Any tip is highly appreciated. Thanks
    Attached Files
    Last edited by ligs; 01-10-2011, 07:44 AM.

    Leave a comment:


  • Paul Carmody
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by ligs View Post
    I borrowed your high pass XO with a simple LC 2nd order electrical(1.8 mh, 15 uf and a tank of 0.68 uf--3 ohm across the 1.8 mH 14 AWG air core) to the K-6.5 woofer. The system sounds very smooth and quite polite and may need less attenuation to the tweeter? I can not find any irrating quality at all.

    Let me know if and when you can go ahead with the design and I can act accordingly.
    So wait, you already have the Klipsch woofer and BG Neo3 hooked up and in a cabinet? If so, why do you need me? Seriously, though, if you're already that far along, you can just send me your project files and I'll help you out.

    Leave a comment:


  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Wolf View Post
    No. Resistors do not change the slope/rolloff, but can change damping at the knee of the rolloff.
    Later,
    Wolf
    Thanks.

    Leave a comment:


  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Paul Carmody View Post
    It'd be no problem, normally. However, I don't know if I have any baffles that would suit it. (and it's REALLY hard to get woodworking time with a baby in the house)

    Do you have the T/S parameters for the woofer? I'll look and see if it fits into something I have.
    John has tested this particular Klipsch 6.5 buyout driver in his blog. Look at Oct 31's entry in

    http://www.zaphaudio.com/blog.html

    And there has been a lot of discussion in Tech Talk on this driver.

    http://techtalk.parts-express.com/sh...d.php?t=219912


    I borrowed your high pass XO with a simple LC 2nd order electrical(1.8 mh, 15 uf and a tank of 0.68 uf--3 ohm across the 1.8 mH 14 AWG air core) to the K-6.5 woofer. The system sounds very smooth and quite polite and may need less attenuation to the tweeter? I can not find any irrating quality at all.

    Let me know if and when you can go ahead with the design and I can act accordingly.


    Thank You.

    Leave a comment:


  • marscoast
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Paul Carmody View Post
    Yes, for all intents and purposes, you have the trademark on that one. I just had to do it this time to fit the theme. I thought of you when I did it.

    And now I'm gonna try real hard not to name my speakers after ancient computers anymore. :o
    Aw, no "Timex Sinclair" forthcoming? My first personal computer... I suppose you could call it that.

    10 print "Hello World"
    20 goto 10

    Leave a comment:


  • Wolf
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by ligs View Post
    Thanks for the answer. What about putting the resistor immediately before the tweeter? Would that change the slope of rolloff?
    No. Resistors do not change the slope/rolloff, but can change damping at the knee of the rolloff.
    Later,
    Wolf

    Leave a comment:


  • Paul Carmody
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by ligs View Post
    Would you be interested in doing a Klipsch buyout version if I send you a pair of K-6.5 woofers at my expense?
    It'd be no problem, normally. However, I don't know if I have any baffles that would suit it. (and it's REALLY hard to get woodworking time with a baby in the house)

    Do you have the T/S parameters for the woofer? I'll look and see if it fits into something I have.

    Leave a comment:


  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Paul Carmody View Post
    The crossover is reliant on a lot more than just the sensitivity of the driver. Because it's a metal-cone driver, there is a notch filter that targets the cone breakup. I'm also very careful on how I shape the midrange response of the 7" 2-ways. So I wouldn't do a version with the Klipsch buyout unless I heard it in person.
    If you want to try it and tweak that's fine, but it's no longer my design. ;)
    Would you be interested in doing a Klipsch buyout version if I send you a pair of K-6.5 woofers at my expense?

    Leave a comment:


  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Wolf View Post
    Nope. In that position, all it would do is change the attenuation or level of the output the driver yields in comparison to the midbass. All resistors do is attenuate or damp in a selective application. You can't change the slope with a resistor alone.

    Later,
    Wolf
    Thanks for the answer. What about putting the resistor immediately before the tweeter? Would that change the slope of rolloff?

    Leave a comment:


  • Filius
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Big soundstage and good imaging and all that? I assume so, but you don't say so specifically in either of your write-ups, as you do for other designs.

    Sorry to pepper you with questions, just trying to decide on my next build and these look interesting. I want to make the right decision since I probably won't be doing another for quite a while. But no pressure!! ;)

    Leave a comment:


  • Paul Carmody
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by ligs View Post
    I am really admiring at the simplicity of the crossover.
    Humm, I wonder how would Klipsch 6.5 buyout would sound in this arrangement with minor modification of the XO. PE says K 6.5 has the same sensitivity as this HIVi driver.
    The crossover is reliant on a lot more than just the sensitivity of the driver. Because it's a metal-cone driver, there is a notch filter that targets the cone breakup. I'm also very careful on how I shape the midrange response of the 7" 2-ways. So I wouldn't do a version with the Klipsch buyout unless I heard it in person.
    If you want to try it and tweak that's fine, but it's no longer my design. ;)

    Leave a comment:


  • Paul Carmody
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Filius View Post
    Can you get the sensitivity just by looking at the response graph? i.e. if the response falls within 80 and 85db for the most part, is that also the sensitivity?
    Yeah, that sounds about right. I'd say the sensitivity of these is about 83-84 dB--which is pretty much par for a 2-way with a 7" woofer with "full Baffle Step Compensation."

    Leave a comment:


  • Wolf
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by ligs View Post
    Paul,

    One question about the 8 ohm series resistor in the tweeter high pass. If I reduce the reistance to 6 or 4 ohms, would the slope of the high pass change?

    Thanks in advance
    Nope. In that position, all it would do is change the attenuation or level of the output the driver yields in comparison to the midbass. All resistors do is attenuate or damp in a selective application. You can't change the slope with a resistor alone.

    Later,
    Wolf

    Leave a comment:


  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Paul,

    One question about the 8 ohm series resistor in the tweeter high pass. If I reduce the reistance to 6 or 4 ohms, would the slope of the high pass change?

    Thanks in advance

    Leave a comment:


  • ligs
    replied
    Re: ZX Spectrum: HiVi M6A + BG Neo3 PDRW

    Originally posted by Paul Carmody View Post
    I added the FR graph.
    It's crossed just shy of 2000 Hz. Don't try this at home, kids. :rolleyes:
    I am really admiring at the simplicity of the crossover.
    Humm, I wonder how would Klipsch 6.5 buyout would sound in this arrangement with minor modification of the XO. PE says K 6.5 has the same sensitivity as this HIVi driver.

    Leave a comment:

Working...
X