My Harman (JBL M2) Trip

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jtwrace

Re: My Harman (JBL M2) Trip
« Reply #480 on: 28 Aug 2020, 05:50 pm »
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.  :o :slap: :bawl: :finger:    



 

jtwrace

Re: My Harman (JBL M2) Trip
« Reply #481 on: 28 Aug 2020, 05:53 pm »
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...
  
« Last Edit: 31 Aug 2020, 07:41 pm by jtwrace »

jtwrace

Re: My Harman (JBL M2) Trip
« Reply #482 on: 28 Aug 2020, 05:53 pm »
And finally the completed sub with a measurement:
 


 


 
« Last Edit: 31 Aug 2020, 07:38 pm by jtwrace »

Folsom

Re: My Harman (JBL M2) Trip
« Reply #483 on: 29 Aug 2020, 02:19 pm »
What driver is that?

richidoo

Re: My Harman (JBL M2) Trip
« Reply #484 on: 29 Aug 2020, 07:05 pm »
Looking good Jason!  :thumb:

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

I tried PL on small t-nuts (256 of them!  :o ) 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

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Re: My Harman (JBL M2) Trip
« Reply #485 on: 29 Aug 2020, 08:53 pm »
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

Re: My Harman (JBL M2) Trip
« Reply #486 on: 29 Aug 2020, 10:16 pm »
That Ciare has particularly high mechanical Q, iirc?  :thumb:

poseidonsvoice

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Re: My Harman (JBL M2) Trip
« Reply #487 on: 29 Aug 2020, 11:20 pm »
That Ciare has particularly high mechanical Q, iirc?  :thumb:

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

Re: My Harman (JBL M2) Trip
« Reply #488 on: 30 Aug 2020, 01:20 pm »
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!  :o ) 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

Re: My Harman (JBL M2) Trip
« Reply #489 on: 30 Aug 2020, 02:25 pm »
Here is a quick measurement of the Ciare


 

jtwrace

Re: My Harman (JBL M2) Trip
« Reply #490 on: 31 Aug 2020, 07:41 pm »
Post 481 & 482 above complete the build    :thumb:


Now time for the "fun" part...

brj

Re: My Harman (JBL M2) Trip
« Reply #491 on: 5 Sep 2020, 07:58 pm »
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

Re: My Harman (JBL M2) Trip
« Reply #492 on: 6 Sep 2020, 12:29 am »
I used tall Tee Nuts and the top edge would've been ~.500" from the baffle step to the top of the Tee Nut.