[jtwrace]

Now you might be wondering what it looks like underneath?  Of course, I'll show you a terrible pic! 


See how it squeezed out evenly?  Now you might want to touch it and remove the extra.  Do not!  Why?  You run the risk of getting it on the bolt and not even knowing that and then when you go to remove them, you realize what happened.     



 

[jtwrace]

Next was to solder the Belden 1313A to the Neutrik speakON and install into the cabinet. 


 

Stuff it!
 

Install the driver!
 


I was confident that it was all correct as I always check each step; however, it's so much easier to check now as a complete assembly...
  

[jtwrace]

And finally the completed sub with a measurement:
 


 


 

[Folsom]

What driver is that?

[richidoo]

Looking good Jason! 

Glad to see you have the room volume to try big subs again.

I tried PL on small t-nuts (256 of them!  ) but it didnt stick well to the zinc plating.
Bob Smith Insta-Cure+ medium CA glue worked much better for me on t-nuts.

[poseidonsvoice]

What driver is that?

Jason can correct me but I believe he built sub(s) with the Ciare 18.00 SW and the Dayton UM18-22 drivers. The quad ported appears to be the Ciare and the sealed box perhaps the Dayton. Both excellent but for different purposes. I am sure the Ciare has excellent midbass wallop and attack. The quad ported enclosure is nice cause he could potentially play with the LF tuning using sealed, ported or “in between” if he uses port plugs.

Best,
Anand.

[richidoo]

That Ciare has particularly high mechanical Q, iirc? 

[poseidonsvoice]

That Ciare has particularly high mechanical Q, iirc? 

Indeed it does. The 8 ohm version has a BL around 32-35 T-M. That’s quite a bit for an 18 inch woofer.  I don’t think Josh Ricci of Databass has tested it yet but I am sure it’s a fine choice.

Best,
Anand.

[jtwrace]

Jason can correct me but I believe he built sub(s) with the Ciare 18.00 SW and the Dayton UM18-22 drivers. The quad ported appears to be the Ciare and the sealed box perhaps the Dayton. Both excellent but for different purposes. I am sure the Ciare has excellent midbass wallop and attack. The quad ported enclosure is nice cause he could potentially play with the LF tuning using sealed, ported or “in between” if he uses port plugs.

Best,
Anand.

This is indeed 100% correct. 

I tried PL on small t-nuts (256 of them!  ) but it didnt stick well to the zinc plating.
Bob Smith Insta-Cure+ medium CA glue worked much better for me on t-nuts.

Strange, never had an issue. 

[jtwrace]

Here is a quick measurement of the Ciare


 

[jtwrace]

Post 481 & 482 above complete the build   


Now time for the "fun" part...

[brj]

Now you might be wondering what it looks like underneath?  Of course, I'll show you a terrible pic!

Nicely done!  Any chance you took a pic of the front after install, or remember how close to flush the top edge of the T-nut was to the front face of the MDF?

(I'd debated something like this when assembling my semi-custom Rythmiks, but since the baffle had a double layer of MDF and I couldn't find "taller" T-nuts - and I wanted to minimize handling for the sake of the gloss black finish - I opted to harden the holes with CA adhesive instead.  That turned out to be too much for the supplied screws and several sheared during install.  It was agony to extract them and recover, especially as I was trying desperately to protect the finish the entire time.  If I ever have to go back in, I'll revert to T-nuts or similar even if I can't find tall ones!)

[jtwrace]

I used tall Tee Nuts and the top edge would've been ~.500" from the baffle step to the top of the Tee Nut. 

[jtwrace]

My M2's have found their new location in the new room.  I thought they sounded good before, now, OMG!   


 

[richidoo]

Congrats on the new digs!

[quailpark]

My M2's have found their new location in the new room.  I thought they sounded good before, now, OMG!   

How far do you have them separated and from the wall behind the speakers?

[jtwrace]

How far do you have them separated and from the wall behind the speakers?

~4.5'

[studley]

Dac > BSS BLU 50 > (2) Hypex NC502MP > (2) JBL M2

The BLU 50 doesn’t have digital inputs so I understand why you have a DAC preceding it in the chain.  However it does seem counter-intuitive to have a DAC conversion only to be followed by ADC and then another set of DAC conversions.  Have you tried other approaches / chains with the M2s and if so what are your thoughts on the differences?

[jtwrace]

The BLU 50 doesn’t have digital inputs so I understand why you have a DAC preceding it in the chain.  However it does seem counter-intuitive to have a DAC conversion only to be followed by ADC and then another set of DAC conversions.  Have you tried other approaches / chains with the M2s and if so what are your thoughts on the differences?

Other than the DCi, no.  That will change in time though. 

[studley]

Other than the DCi, no.  That will change in time though.

I’d be interested to hear your plans.   After reading Mitch’s articles about AudioLense I’ve become convinced that it is something I’ve got to try.  I’ve also read that someone has used the full AudioLense functionality on the M2s to great effect.