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    Can anyone offer info on TM212 venting?

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    bordonbert

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    Can anyone offer info on TM212 venting?

    Post by bordonbert on Thu May 14, 2015 9:53 am

    Wow, first post ever in this forum too. I'm doubly humbled!

    As I've just posted in the TM112 forum, is there anyone out there with a TM212 who can give me a description of its venting? I', not sure if it would be a properly designed reflex port matched to the cabinet volume and driver resonance, or it could just be a plain old hole in the box. H&K use Celestion Vintage 30s but this driver is not best suited to port loading usually performing best in a plain cab. So is H&K's "vent" just an untuned opening to the outside air, or is it a properly loaded reflex port to boost and extend the bass response? And can you estimate the approximate dimensions of the hole/port?

    As I said, I've posted this query regarding the TM112 in its forum too in the hope of catching a few more users.
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    HwyStar
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    Re: Can anyone offer info on TM212 venting?

    Post by HwyStar on Tue May 19, 2015 9:49 pm

    I don't have a TM212 cabinet to answer your question Bordonbert, sorry.

    I personally don't care for front facing ports in guitar cabinets. For years I have been using open backed cabinets and prefer their sound over front ports. Maybe it's the delayed response of getting the bass at a later time, but for me ears I like how the speakers open up and breath better. Many years ago I cut a 1.5 foot square hole in my 4x12 cabinets and have not looked back.

    I had actually considered getting a TM212 and covering the front port and opening up the back! Too each his own. YMMV.


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    normula1

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    Join date : 2014-08-21

    Re: Can anyone offer info on TM212 venting?

    Post by normula1 on Sun May 24, 2015 2:50 pm

    it's just a couple of small holes in the front panel
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    bordonbert

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    Re: Can anyone offer info on TM212 venting?

    Post by bordonbert on Wed May 27, 2015 8:37 pm

    Why does that not surprise me Normula? Laughing Could you give an idea of dimensions? Is it round or square? There is no requirement for a port to be cylindrical. Are you sure there is not even a short tube leading back into the cabinet?

    Like you I also like the sound of some open back cabs Hwy. I loved the sound of my own cheap cabinets when they were open backed, but they did lack a bit of low down grunt. Closing them off gave them a little of that without losing anything higher up, (including subtlety). I'm just looking for an easy way to get even more low down energy, (for free helps), and a port may be of use. It's a bit disappointing to find that H&K may have really just designed another square cabinet with a couple of holes in it. Is that their ideas of "venting" rather than "porting"?

    normula1

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    Re: Can anyone offer info on TM212 venting?

    Post by normula1 on Fri Jun 12, 2015 11:18 am

    So I finally got time to whip the back off again....

    there's three holes about 60mm each. One in each lower corner and one centrally above the soundpost



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    bordonbert

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    Re: Can anyone offer info on TM212 venting?

    Post by bordonbert on Fri Jun 12, 2015 8:53 pm

    Hey, thanks for that.  Well I'm damned!  That's pretty 'blaahhh' I have to say.  I expected something a little more - well - engineered.  Mind you that is assuming there isn't something clever going on re loading or frequency adjusting here that I don't understand.  But it sure isn't a well designed reflex enclosure is it?  Why didn't they just leave the enclosure closed?  Could it be they were trying to knock off a bit of the bottom end or something?  That's a puzzler!

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