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Amazing what wire can do

Discussion in 'Axe-Fx II Discussion' started by FractalAudio, Dec 24, 2014.

  1. FractalAudio

    FractalAudio
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    The Axe-Fx is designed to recreate the signal at the speaker jack of a tube amp and it does this tremendously well. If I do a Tone Match to the output of the amp vs. the model it's almost always nearly a perfectly flat line.

    So today I was playing around and did a quick tone match to one of my Plexis and then a Suhr Badger and the results showed a significant mid-scoop (2-3 dB). I was puzzled. Had I messed something up in the new firmware? I repeated the tone match using a DI off the speaker jack and the result was a perfectly flat line. Then I realized that the difference was due to this 30 ft speaker cable I was using because the speaker cab was remote from the amp. Just a bit surprised that that little resistance could have that much effect.

    Fortunately the new Cab-Lab addresses all this by allowing you to capture reference IRs and we've included reference IRs along with our latest Cab-Pack.

    To double-check I then captured a reference IR off the speaker and corrected the IR using the new Cab-Lab and viola, perfectly flat.
     
  2. jiggajewjay

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    Wow that is so cool!
     
  3. phitho

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    Goes to show that we all take for granted the importance of wires in the equation, even the master himself.
     
  4. SeeD

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    Cool
     
  5. swass

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    So it begs the rhetorical question... when will we be able to experiment this for ourselves with the new Cab Lab?... I know, I know... SOON! :p
     
  6. chucma

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    So good to get scientific evidence on this point. The guys at my Church always gave me a hard time because I was so fussy about my cable length and whether I was using a buffer or not (pre Axe-Fx days); they always said cable doesn't make any difference but I had no way of proving it. :)

    Love that the Axe-Fx picks up on this!
     
  7. clarky

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    I deliberately use long cables with my Morgan V6 guitars to calm the highs a little cos they're quite bright
    my long cable is essentially my 'pre-eq'.. it does just enough to hit the spot..
     
  8. musicman77

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    Pretty cool!
     
  9. FractalAudio

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    There's a big difference between a long cable between your guitar and amp and a long speaker cord. A long instrument cord loads your guitar's pickups with a reactive load that's mostly capacitive. This changes the resonant frequency of the pickups and rolls off the highs. A long speaker cord increases the resistance between the amp and the speaker which decreases the damping factor. A lower damping factor means the response follows the impedance curve of the speaker more than a high damping factor.
     
    marcor66 and chucma like this.
  10. NeoSound

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    I thought Eric Johnson was crazy when he talked about using different speaker cables between his cabs and heads for rhythm or lead and the different effects of it. I guess he was onto something?
     
    jasonwb007 and Randy4Guitars like this.
  11. barhrecords

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    It's pretty bad ass that the Fractal could be used to differentiate a change to the rig like that.

    Cool stuff.
     
  12. Hellbat

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    So is the speaker cable length parameter going into the amp block or the cab block?

    ;)
     
    vestapol, Clive, moshwitz and 3 others like this.
  13. joegold

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    Cliff, if you have the time (and the patience for non-technical types like me) could you please try to explain what you mean by "reference IRs" and how they will be used to achieve various results in the new Cab-Lab app?

    E.g. A reference of what (if that even makes sense)?
    E.g. How does one capture a reference IR of a speaker?
    E.g. What are the reference IRs included in that Cab-Pack based on?
    [I don't own that Cab-Pack yet and there's no info about reference IRs on the fractal-Store web site that I can see.]
    Etc.
    Etc.

    Thanks
     
  14. strat714

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    Will added resistance in the cable change the impedance that a power amp sees?
     
  15. UnsungHeroGuitars

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    Not only flat, but you also suddenly had a large violin too [​IMG]
     
  16. ChrisMetal86

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    LOL :lol
     
  17. Triaxis75

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    Annnnd I'm cleaning Smirnoff off of my shirt and keyboard....
     
  18. Sidivan

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    Was it an oxygen free cable? :D
     
  19. unix-guy

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    I heard they choke your tone [emoji6]


    Sent from my iPhone using Tapatalk
     
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  20. felken

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    +1 on what is a reference IR vs?
     

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