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SB Acoustic 3W

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  • Audio4me
    replied
    excuse so much for responding to an old thread, but i need to know if there is a measured frequency response of this project.
    best regards, thank you

    Leave a comment:


  • bret191
    replied
    Re: SB Acoustic 3W

    Originally posted by pierre666 View Post
    I am still experiencing som new things everyday, trying to get the most out of it. I was trying back and forth to change the port's lenght without never quite getting it right. I thought it was time to change the first resistance to the mid, to try to get it to deliver more '' presence''. I went to Solen to buy 1 Ohms resistance...there I spoke a lot with the owner of this shop and the first thing he did was asked me what I had use as damping material. I told him some kind of tar with carpet underpad on top and finally I put polyester wool inside all of the boxes ( bass is BR and mid is Sealed). In order to get the mid to come forward, he recommended me to but angel hair wool before trying any modification to the Xover. Also I told him that I found the bass to be a bit boomy. He sold me a sheet of Convoluted Open Air Cell Acoustic Foam.

    Once I got home I immediately, changed the stuffing in the mid box, and you know what, he was right. The mid came alive!!!!!! Exactly where I wanted it to be. I got rid of the polyester wool and I installed the Convoluted Open Air Cell Acoustic Foam in the bass box putting it on the top area, the back and the sides. I tried it and wow, what a difference but the bass was still a bit loose...I had angel hair left...I toose a hand full of angel hair in the back of each woofer....:eek:...wow, WOW, WOW and WOW!...now it is really a jaw dropper...........OMG am I done!!!!!!!!!!!!!!!!!!!!!!!!!!!!:rolleyes: until the next upgrade!!!
    HEY, what ever came from this project? I'd like to see the results as I am sure a lot of others would to..
    See Ya.

    Leave a comment:


  • kendomusic
    replied
    Re: SB Acoustic 3W

    Hi, I am intrigued by this Satori tweeter since it seems it could go as low as 1500 hz. How would you describe its sonic character? Airy? I used an SS 9700, it was clear and precise but seemed to miss airy qualities. Compared to the Vifa XT tweeters?
    Thanks
    Ken

    Leave a comment:


  • djkest
    replied
    Re: SB Acoustic 3W

    Originally posted by pierre666 View Post
    Chuck and I live at +- 70 milles apart. So we do not meet that often...

    Nothing is lost...when I get to do the measurements, people will know...

    Would your project be All Dayton ?
    No, I like the SB Acoustics midwoofers. Either the 5" midwoofer or the 4" midrange. Not sure about the tweeter yet, it's a theoretical project at this point.

    Leave a comment:


  • pierre666
    replied
    Re: SB Acoustic 3W

    Chuck and I live at +- 70 milles apart. So we do not meet that often...

    Nothing is lost...when I get to do the measurements, people will know...

    Would your project be All Dayton ?

    Leave a comment:


  • djkest
    replied
    Re: SB Acoustic 3W

    Originally posted by NyxOne View Post
    Me.

    And I bet I'll get the chance to hear these in a near future! ;)

    Chuck
    Did this ever happen? This is a pretty interesting project. I've been thinking about building something similar, but with a PAIR of RS225-4s on the bottom.

    Leave a comment:


  • djkest
    replied
    Re: SB Acoustic 3W

    Originally posted by pierre666 View Post
    here's the latest upgrade



    A Satori Tweeter ( TW29R). You have a project featuring the SB29 and you wonder if it you be worth it to remplace it with a high end tweeter as an upgrade...for half of the price of a SS you will get this Satori...

    With the SB29 the highs where clean and precise but it was kind of faded in the musical image. Here you have the high screaming...Honey...I'm home!!! Crisp clean highs that dominates the whole sound. Not too forward, just at it's place where all the other ranges comme to attach to it leaving the dominance to the highs....

    And the best of this upgrade, I just dropped it in, without even doing anything to the Xover...and it sounds Great!!!!!!!!!!!!!!!
    Interesting. I hadn't considered the idea that the Satori could literally "drop in" to replace the SB29RDC, but it sounds quite reasonable. They are the same size, measure fairly similar. You noticed a significant difference then?
    The Satori is about $100 more, per side. The Satori has a thicker faceplate, so would need to be recessed more.

    This is the only design I've seen using the SB midrange, as well.

    Leave a comment:


  • pierre666
    replied
    Re: SB Acoustic 3W

    here's the latest upgrade



    A Satori Tweeter ( TW29R). You have a project featuring the SB29 and you wonder if it you be worth it to remplace it with a high end tweeter as an upgrade...for half of the price of a SS you will get this Satori...

    With the SB29 the highs where clean and precise but it was kind of faded in the musical image. Here you have the high screaming...Honey...I'm home!!! Crisp clean highs that dominates the whole sound. Not too forward, just at it's place where all the other ranges comme to attach to it leaving the dominance to the highs....

    And the best of this upgrade, I just dropped it in, without even doing anything to the Xover...and it sounds Great!!!!!!!!!!!!!!!

    Leave a comment:


  • pierre666
    replied
    Re: SB Acoustic 3W

    Lengthening the port will tune your enclosure to a lower frequency. Perhaps it was a bit underdamped with a High Q (1.5???) and that resulted in it sounding "boomy". After adjusting the tuning to a lower frequency, you may have also lowered the Q (down to 1.0 now ???) and eliminated the upper bass boominess.
    I am still experiencing som new things everyday, trying to get the most out of it. I was trying back and forth to change the port's lenght without never quite getting it right. I thought it was time to change the first resistance to the mid, to try to get it to deliver more '' presence''. I went to Solen to buy 1 Ohms resistance...there I spoke a lot with the owner of this shop and the first thing he did was asked me what I had use as damping material. I told him some kind of tar with carpet underpad on top and finally I put polyester wool inside all of the boxes ( bass is BR and mid is Sealed). In order to get the mid to come forward, he recommended me to but angel hair wool before trying any modification to the Xover. Also I told him that I found the bass to be a bit boomy. He sold me a sheet of Convoluted Open Air Cell Acoustic Foam.

    Once I got home I immediately, changed the stuffing in the mid box, and you know what, he was right. The mid came alive!!!!!! Exactly where I wanted it to be. I got rid of the polyester wool and I installed the Convoluted Open Air Cell Acoustic Foam in the bass box putting it on the top area, the back and the sides. I tried it and wow, what a difference but the bass was still a bit loose...I had angel hair left...I toose a hand full of angel hair in the back of each woofer....:eek:...wow, WOW, WOW and WOW!...now it is really a jaw dropper...........OMG am I done!!!!!!!!!!!!!!!!!!!!!!!!!!!!:rolleyes: until the next upgrade!!!

    Leave a comment:


  • NyxOne
    replied
    Re: SB Acoustic 3W

    Originally posted by ReissM View Post

    Is there anybody out there that lives nearby and can assist pierre666 with some measurements?
    Me.

    And I bet I'll get the chance to hear these in a near future! ;)

    Chuck

    Leave a comment:


  • ReissM
    replied
    Re: SB Acoustic 3W

    Originally posted by pierre666 View Post
    I though I was ready to modify things in the Xover, instead, last night I played around with the box tuning of the woofers.

    I switched around the port from 4'' to 5'' and then to 7'' of overall length. It went to (as said) too much bass going toward a cleaner and cleaner bass, leading ultimately to better placed mids in the overall image...the best word to described it now is COHERENCE...:eek:

    For now it the best i've heard...we'll leave it like this for a couple of weeks ( and listen to ALL of my cds)...with my new babies...!

    P.S.: I am not equipped and I don't have the know-how to take measurement of the behavior of these babies, I can only go according to my ears... sorry to disappoint you ReissM...
    Lengthening the port will tune your enclosure to a lower frequency. Perhaps it was a bit underdamped with a High Q (1.5???) and that resulted in it sounding "boomy". After adjusting the tuning to a lower frequency, you may have also lowered the Q (down to 1.0 now ???) and eliminated the upper bass boominess.

    I still wish that we could take some measurements on these. You've got a Ferrari but don't have the tools to make it run to its full potential. Getting the midrange to tweeter transition measuring 'flat' and phase-tracked will astound your ears!

    Is there anybody out there that lives nearby and can assist pierre666 with some measurements?

    In the meantime, play around with room acoustics suggestions from my previous post. You'll find that the bass response can vary significantly depending on speaker location within the room. We don't want you tweeking the port tuning when the room's acoustics might be the culprit.

    Don't stress out, have fun with it... even if it takes a few more months.

    Leave a comment:


  • pierre666
    replied
    Re: SB Acoustic 3W

    I though I was ready to modify things in the Xover, instead, last night I played around with the box tuning of the woofers.

    I switched around the port from 4'' to 5'' and then to 7'' of overall length. It went to (as said) too much bass going toward a cleaner and cleaner bass, leading ultimately to better placed mids in the overall image...the best word to described it now is COHERENCE...:eek:

    For now it the best i've heard...we'll leave it like this for a couple of weeks ( and listen to ALL of my cds)...with my new babies...!

    P.S.: I am not equipped and I don't have the knowhow to take measurement of the behavior of these babies, I can only go according to my ears...sorry to desapointe you ReissM...
    Last edited by pierre666; 10-26-2012, 10:38 AM.

    Leave a comment:


  • ReissM
    replied
    Re: SB Acoustic 3W

    Originally posted by pierre666 View Post
    I have already modified the original Xover design with someone that really knows what he is doing, in fact I am in the last phases of voicing....I have upgraded 2 caps ( C1 & C2) with Obbligato caps. For now I must say, the precision of the mids and high have dropped my jaw. Now I have to adjust the image between mid-High notes and bass....for now the bass is too powerful....
    That's great to hear! Are you going to post some measurements after you finalize everything? Thanks.

    P.S. - Don't forget that the loudspeakers' placement in the room can significantly affect their bass response due to Boundary Augmentation. Try varying the proximity to nearby boundaries to see if the bass still seems too much.

    Additionally... axial, tangential and oblique room modes can inject weird "hot spots" and "dead spots" within a room, so be aware of those "environmental" issues that can sometimes make an excellent speaker seem to perform poorly. If you can walk 3 feet over and the bass response appears to change very dramatically, you might have some room mode issues, not speaker issues. There are several ways to deal with this problem if it becomes necessary. Let us know how things go. Thanks.

    Leave a comment:


  • pierre666
    replied
    Re: SB Acoustic 3W

    Originally posted by ReissM View Post
    Those are absolutely stunning! You REALLY need to nail the crossover. You wouldn't want people to be disappointed in their sound after you put so much time & effort into their aesthetics, right?

    OK TT guys, how can we help him smash this out of the park?

    You definitely need to measure this puppy and import everything into Jeff's PCD software. I agree with WOLF... it's possible, but unlikely... that all of the electrical slopes would be 12dB/octave.

    I would guess that your speakers would probably sound "ok" with either of the two crossovers shown above. BUT YOU DON'T WANT TO SETTLE FOR "OK"... you want jaw-dropping awesome! And that's going to take some testing and optimizing of the acoustic and electrical responses (simultaneously taking into consideration the acoustic phase and electrical phase response as well.)

    Is there anybody out there in cyber-space that lives nearby and can measure his speakers???

    After the .FRD's and .ZMA's are measured, I'm sure that several of us would offer to play with those files in PCD for him. Then he could build the PCD optimized version and run them through another round of testing to confirm the results.
    I have already modified the original Xover design with someone that really knows what he is doing, in fact I am in the last phases of voicing....I have upgraded 2 caps ( C1 & C2) with Obbligato caps. For now I must say, the precision of the mids and high have dropped my jaw. Now I have to adjust the image between mid-High notes and bass....for now the bass is too powerful....
    here is the schematic modified

    Leave a comment:


  • ReissM
    replied
    Re: SB Acoustic 3W

    Those are absolutely stunning! You REALLY need to nail the crossover. You wouldn't want people to be disappointed in their sound after you put so much time & effort into their aesthetics, right?

    OK TT guys, how can we help him smash this out of the park?

    You definitely need to measure this puppy and import everything into Jeff's PCD software. I agree with WOLF... it's possible, but unlikely... that all of the electrical slopes would be 12dB/octave.

    I would guess that your speakers would probably sound "ok" with either of the two crossovers shown above. BUT YOU DON'T WANT TO SETTLE FOR "OK"... you want jaw-dropping awesome! And that's going to take some testing and optimizing of the acoustic and electrical responses (simultaneously taking into consideration the acoustic phase and electrical phase response as well.)

    Is there anybody out there in cyber-space that lives nearby and can measure his speakers???

    After the .FRD's and .ZMA's are measured, I'm sure that several of us would offer to play with those files in PCD for him. Then he could build the PCD optimized version and run them through another round of testing to confirm the results.

    Leave a comment:

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