The new Mark Audio CHN-110 6" driver

[planet10]

What amp you use depends… a higher R_out amplifier needs a box that takes some care in flattening the impedance.

dave

 

[j4n3zz]

Has anyone tried building the St Helens Top Firing Vented Box for the CHN-110 from the official web page ?
https://www.markaudio.com/wp-content/uploads/2022/09/CHN110-St-Helens-top-firing-vented-box.png

I have limited space in my listening room, so this enclosure seems a perfect fit, but I was wondering if anyone has experience with it ?

Thanks in advance!

 

[hmj]

Has anyone tried building the St Helens Top Firing Vented Box for the CHN-110 from the official web page ?
https://www.markaudio.com/wp-content/uploads/2022/09/CHN110-St-Helens-top-firing-vented-box.png

I have limited space in my listening room, so this enclosure seems a perfect fit, but I was wondering if anyone has experience with it ?

Thanks in advance!

Interesting indeed? Smaller than the Kewel yet goes some 10hz lower? I'm sure Planet10 or Scottmoose can help as they have produced several designs for the CHN110.

 

[waxx]

Interesting indeed? Smaller than the Kewel yet goes some 10hz lower? I'm sure Planet10 or Scottmoose can help as they have produced several designs for the CHN110.

The design is by Scottmoose (Scott Lindgren), it's one of the many he did for Mark Audio as consultant.

 

[hmj]

The design is by Scottmoose (Scott Lindgren), it's one of the many he did for Mark Audio as consultant.

Hi Waxx. What design did you settle on for your 110's?

 

[waxx]

Hi Waxx. What design did you settle on for your 110's?

I did a own design MLTL, a bit like the Kewel, but front ported and with a slot in place of a tube. It's not a clear picture, but it's evening here and i only got my iphone with me for it...

 

[hmj]

I did a own design MLTL, a bit like the Kewel, but front ported and with a slot in place of a tube. It's not a clear picture, but it's evening here and i only got my iphone with me for it...

View attachment 1097556

They look really nice. Are you pleased with the sound? How do you design a slot over a port? Is there a conversion formula. I do like the old school appearance of a slot

 

[waxx]

They look really nice. Are you pleased with the sound? How do you design a slot over a port? Is there a conversion formula. I do like the old school appearance of a slot

They are good, i have many speakers, but these are (with the big fanes) in the main spot now for some time. They are not eq'ed at all and don't need it.

The MLTL was designed from start with a slot port. How to do the conversion i don't really know (i'll have to research it) i use square cm for how big the area must be and make sure the slot is not more than 1:5 height vs width and big enough for the air speed to be low enough to not disturb. The math for that you can find on the site of Martin King or use hornrsp (like most do today) to calculate. Speaker design is math mostly, and i'm good at math the oldskool way (by head or pen and patper) so that is how i do it.

 

[planet10]

I typically use this:http://p10hifi.net/FAL/downloads/Changing-Port-Size.pdf

My modeler generates slot vent sizes, i use that when doing an original design.

dave

 

[hmj]

Hi Dave. I'm being curious as to converting a cylindrical port for a particular frequency to a slotted one for the same spec. Aka the old school look.

 

[planet10]

I just use the calculations but use the area of the slot. If the aspect ratio is high one will add R to the vent, pushng it a bit towards aperiodic. Something i have come to appreciate.

dave

 

[hmj]

Something I need to research.

 

[waxx]

If the aspect ratio is high one will add R to the vent, pushng it a bit towards aperiodic. Something i have come to appreciate.

dave

With the right (high qts) driver, this can be magic. But it does not work for all drivers. And then i damp the port with some mouse or thick cloth like an aperiodic (just less damping than typical).

 

[hmj]

Interesting. Appears to be a hybrid of a BR, IB and TL. How do you design for that ??

 

[planet10]

this can be magic

:^)

dave

 

[waxx]

i did some inroom measurements of my CHN110 MLTL... Off course you see the room modes in the bass section as my listening room is not treated and i used here no eq in any form. This is amp direct to driver in the cabinet in room from my listening position more or less.

 

[Scottmoose]

Nice job.

 

[planet10]

Really quite flat. What happens when you put more averaging into it?

dave

 

[waxx]

@planet10 this is already the average of 10 measurements of this cabinet. I'll don't do other anymore to try.

 

[planet10]

1/24th smoothing. What does it look like at 1/6 or ⅓?

dave