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Nano 3 liter challenge

jhollanderjhollander
in DIY
I did not want to hijack Bill's thread.  But in thinking about the challenge I decided I wanted to look a different port concepts. So as Chuck pointed out in a design team thread, I am a bit crazy, so I brought every port concept to the challenge.  We all knew it was about low bass as a distinguishing factor so I had no misconceptions about what would be competitive (none of these), but still wanted to share the concepts.

First was exposed/ external port


Second was internal port with resonance trap.  The new Peerless SLS-85 and Dx20 sound very good.  This would have been more competitive with the external port, two SLS-85s and not competing against the speaker above.


Third was Internal and external port, the design used the stand to extend port length.  I had a number of people do second takes on these. I admit that I hate the CF120 driver and the ND28 sounds better in everyone else's designs.  These are my least favorites


Fourth was no port, or combine the port with the internal volume.  This is a 3 liter TL.  It got exclude form the competition as the box with the deflectors is large than 3 liters.



So there was a lot of effort to test a bunch of concepts.  While I enjoyed it it was not obvious to others what I was doing other than hogging the show. :astonished: 


 John H, btw forum has decided I don't get emails
kennyk

Comments

  • kennykkennyk
    These were difficult to choose in the competition. They were all very good.  <3
    ............. could you hum a few bars.
  • isaeagle4031isaeagle4031
    I liked all of yours very much John, even the cf120. The sls85 I think has a huge amount of potential as you pointed out. 
  • ani_101ani_101
    I was just amazed at the number of very different , good sounding and fully finished gorgeous mini speakers you brought! The different port design is very nice. Do you have a favorite, though it depends on driver and application? 
  • jhollanderjhollander
    I like the TL concept for extending the bass response without the resonance issues.  The Tectonic BMR is one strange driver, tuning in the 60's and F3 in the low 50's
     John H, btw forum has decided I don't get emails
  • JavadSJavadS
    John I was impressed by your show of effort, didn't think you were hogging at all!

    I will say your CF120 speaker, from where I was sitting, sounded like you had padded the tweeter down too much, not sure what the FR looks like but your other speakers were all voiced much more consistently than this one and to me it stood out.  I was curious about that given that you tuned all 4 speakers, any insight on the FR or anything you found about the XO or design would be intriguing.

    Thanks John!
    Javad
  • 6thplanet6thplanet
    I thought they all sounded great, wait I wasn't there....guess they all sound the same to me  =) ....at least they all look really nice to me!
    JavadS4thtrykennykPWRRYD
  • D1PP1ND1PP1N
    I like that color of green/ aqua. Nice looking builds.
  • jhollanderjhollander
    JavadS said:
    John I was impressed by your show of effort, didn't think you were hogging at all!

    I will say your CF120 speaker, from where I was sitting, sounded like you had padded the tweeter down too much, not sure what the FR looks like but your other speakers were all voiced much more consistently than this one and to me it stood out.  I was curious about that given that you tuned all 4 speakers, any insight on the FR or anything you found about the XO or design would be intriguing.

    Thanks John!
    Javad
    Thanks I did pad the ND28.  I did that design 6 months previous and did not tweak it before the show. I guess because I did not like the Sss sounds from the tweeter. Clearly one of my least favorite tweeters.

    Regarding the x-o design there was nothing special.  

    The TL terminus added a bit of mid range bloat so the tweeter level came up a bit.  

    I split up the Tectonic inductor to be able to notch the baffle step then roll off the top end, all to avoid the 1.7K dip.

    The Peerless drivers were just easy
     John H, btw forum has decided I don't get emails
  • 4thtry4thtry
    I didn't realized you had 3 speakers in Nanotech, I thought it was only 2. :o   This doesn't bother me, it just shows your dedication to the hobby!

      I liked the green Tech 65 speakers the best, they had a very smooth, balanced type sound from top to bottom.  I didn't notice the 1.7khz dip at all.  Probably because it is a very narrow band type glitch. 

    Bill
  • 4thtry4thtry
    I photoshopped a montage of Nanotech's,  showing all speakers in one photo:



    JavadSjhollanderkennykTurn2jr@macNicholas_23greywardenMzissersonThumperTomS7910and 1 other.
  • jhollanderjhollander
    Nice job Bill that montage is cool!
    PWRRYD
     John H, btw forum has decided I don't get emails
  • ani_101ani_101
    Hi Bill,

    Can you pls post this montage in the  InDIYana thread? I as looking for this montage to show my wife and couldn't find it!!! (I found it now!)
  • 4thtry4thtry
    I thought this was the InDIYana thread.  Guess I just hijacked John's thread by mistake.   :o  
    Mzisserson
  • 6thplanet6thplanet
    That's cool,Bill, dig the montage! I'd be nice to see more of the "class" pics done that way.
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