I just found these two kits to put together but I need confirmation that it will work.
Meniscus has a continuum ll kit that I would like to pair with one of the woofer add-ons for a 3-way design. But.... the woofer is 4db hot in a ported design so..... WHAT IF I PUT IT IN A SEALED DESIGN?? The roll-off may just be what I need (fingers crossed).
Here is the woofers natural response in a sealed and a BR design.
The rise in the BR design was explained in the white paper to be too hot (bottom response) compared to the other woofer kit in a BR design (top response) which is more $$$.
So if I were to take the already hot BR design and instead use the sealed design and then side fire the woofer, would this work as intended? I believe this marriage could in fact create a useable flat / er response and still have a usable low end.?.
What do you think, will this work? Problems?
Here is the details. This is the 2-way kit...
Continuum II Loudspeaker Kit - Meniscus Audio
And here is the woofer... this also includes all the necessary passive XO stuff to add it to the Continuum kit (along with other kits too).
Kairos Woofer Module Bare Bones Kit (Pair) - Meniscus Audio
And here is the white paper in the woofer kit.
https://meniscus.lightningbasehoste...he-Kairos-and-Continuum-Three-Way-Writeup.pdf
Meniscus has a continuum ll kit that I would like to pair with one of the woofer add-ons for a 3-way design. But.... the woofer is 4db hot in a ported design so..... WHAT IF I PUT IT IN A SEALED DESIGN?? The roll-off may just be what I need (fingers crossed).
Here is the woofers natural response in a sealed and a BR design.
The rise in the BR design was explained in the white paper to be too hot (bottom response) compared to the other woofer kit in a BR design (top response) which is more $$$.
So if I were to take the already hot BR design and instead use the sealed design and then side fire the woofer, would this work as intended? I believe this marriage could in fact create a useable flat / er response and still have a usable low end.?.
What do you think, will this work? Problems?
Here is the details. This is the 2-way kit...
Continuum II Loudspeaker Kit - Meniscus Audio
And here is the woofer... this also includes all the necessary passive XO stuff to add it to the Continuum kit (along with other kits too).
Kairos Woofer Module Bare Bones Kit (Pair) - Meniscus Audio
And here is the white paper in the woofer kit.
https://meniscus.lightningbasehoste...he-Kairos-and-Continuum-Three-Way-Writeup.pdf
If it is 4dB too hot in a BR it will be 4 dB too hot in a sealed box too. The box does not affect the levels at the end of its response XOing to the midBass.
Typically in a 3-way one wants a woofer 3-6 dB more sensitive than the midbass with an XO (0.707 to 1) x BS(-3). If the XO is low enuff you almost have to go with an active XO and then it does not matter (much).
dave
Dave, in this case if you look at the first photo it shows that the BR starts to gain lower than 100hz. The xo for the woofer is a 200hz low / high pass to the midrange (pictured bottom photo / bottom response) so theoretically the gain should not start until 150hz which then the sealed design will not have a rise in low frequencies and the BR will.
Again theoretically, I am thinking I should only have a mild increase between 100-150hz and then the sealed should not rise lower than 100hz where the BR does.
Is this right?
How is that measured? Are you seeing the typical hump from the quasi-anechoic keasure or is it real?
If it is real then that alignment is not so good as you are getting a bump up right where you are going to excite room modes to greater extent.
If i hear a speaker that looks like the shown measure i’ll grab some open cel foam and stuff the vent pushing it towards aperiodic. More foam, more aperiodic.
How things are in the room are what counts.
dave
If it is real then that alignment is not so good as you are getting a bump up right where you are going to excite room modes to greater extent.
If i hear a speaker that looks like the shown measure i’ll grab some open cel foam and stuff the vent pushing it towards aperiodic. More foam, more aperiodic.
How things are in the room are what counts.
dave
The first photo is the woofer 1w/1m and the two in the lower photos are in room.
In the first photo the grey is sealed which as you say would be a better choice rather than the BR combined with the 2-way in the bottom photo.
In my rather large room I should only get very little gain so I am hoping that rise doesn’t get worse above 100hz.
The lower response is a front fired BR to the 2-way 200hz xo
My goal - is a all sealed 3-way side woofer with the same xo. I think it will measure flat being sealed... I hope.
200hz? Why not go active on the woofer? It will solve the woofer sensitivity issue and the issue of large parts needed for such a low crossover frequency.
As I see it, Jeff Bagby designed what he calls a sort of universal bass module, with two woofers that works in the same enclosure, from which you can choose the one that works best with the 2-way module (continuum or kairos). The CSS module works best with the continuum and the SBA module works best with the kairos being more sensitive.
As noted by Dave, a woofer remains more sensitive irrespective of the box in which is put in (sealed or ported). So for the continuum the "right" woofer is the CSS, until the OP feels that he prefers a rising bass. The alternatives are:
1) search a woofer with a similar SPL than the CSS, with impedance profile similar to the CSS at least in the crossover region (200 Hz). In this way you can still use the crossover designed by Jeff. Note that you may need to adapt volume and tuning of the bass enclosure to suit TS parameters of the new woofer.
2) buy the woofer you like together with a customizable plate amp, something that can provide flexibility on bass level and crossover point.
Ralf
As noted by Dave, a woofer remains more sensitive irrespective of the box in which is put in (sealed or ported). So for the continuum the "right" woofer is the CSS, until the OP feels that he prefers a rising bass. The alternatives are:
1) search a woofer with a similar SPL than the CSS, with impedance profile similar to the CSS at least in the crossover region (200 Hz). In this way you can still use the crossover designed by Jeff. Note that you may need to adapt volume and tuning of the bass enclosure to suit TS parameters of the new woofer.
2) buy the woofer you like together with a customizable plate amp, something that can provide flexibility on bass level and crossover point.
Ralf