DIY Sound Group HTM-12 Build

Discussion in 'DIY Speaker & Subwoofer Building' started by mkohman, Nov 18, 2017.

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  1. Ringnut

    Ringnut
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    "Exactly around"? :D
     
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  2. mkohman

    mkohman
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    Lol.. I mean it's 5.3 and a few cm.. Nice spotting though [emoji106]
     
  3. markymiles

    markymiles
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    Is your screen hinged on the left?. That's a good idea if it is, haven't seen people do that before.
     
  4. mkohman

    mkohman
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    I have a piece of timber on the wall part with L bracket on top and bottom on both sides and then on the screen itself I have L brackets on both top and bottom and both sides of the screen . These L brackets all have a vertical slot so I can freely move the screen forward and back as I wish. There are bolts that lock the brackets when I am satisfied with positioning.

    Today I undone the top and bottom bolts the right of my screen and opened it like a door if you like then set it on a chair to rest whilst I was removing the speakers. I hope that made sense lol.. Hard to explain but I'll remember to take some pictures for you next time [emoji106]

    PS: if you look at the first picture with the m6's look to the right of the picture you will be able to see the black painted timber with L bracket on the top.
     
  5. mkohman

    mkohman
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    very minor update :

    Today I finished what I needed to do earlier then I'd anticipated and left me free for the mid morning, early afternoon.. I took the opportunity to try out my newly purchased Bosch Pex 300 random orbital sander on the cabinets.. Basically I wanted to smooth down the rough corners and excess glue, preparing them for the front baffle which will hopefully be arriving next week, fingers crossed..

    Let me tell you.. I've never owned a random orbital sander but this little beauty is absolutely brilliant.. Such a beautiful machine and easy to work with.. I definitely reccomend anyone who maybe looking to buy one...

    Here are a couple of closeup shots of the edges etc... I appreciate they will be filled and re sanded but it cleaned them and prepared them nicely for the next stage hopefully next week..

    IMG_20171130_125336229.jpg
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    IMG_20171130_125347399.jpg

    In addition to this I thought it would be good if I prepared the horizontal and vertical braces.. Clearly I have no intention in gluing them in before the front baffle arrives but again just wanted them ready as I had the time to knock them out today.. Hope they look ok?

    IMG_20171130_134807782.jpg
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    IMG_20171130_151952987.jpg
    IMG_20171130_153504195.jpg
     
    Last edited: Nov 30, 2017
  6. PsyVision

    PsyVision
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    Braces look pretty spot on!
     
  7. mkohman

    mkohman
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    Thanks but I was thinking they need to be round to let maximum air flow and was planning in tweaking them to this as shown in picture... If it's OK as it is or wouldn't make s difference then I can leave them the way they are.. IMG_20171130_182212880.jpg
     
  8. Liammonty123

    Liammonty123
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    The squares are perfect and making them round would not make any audible difference to the acoustics/air flow inside the box. In fact I have never seen rounded window braces in any box yet! Looking spit on btw!
     
  9. mkohman

    mkohman
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    Thanks Liam , it's only because a mate of mine who builds subwoofers told me they should be round that's why I was considering rounding them off but I will leave them as they are if that's the case.. Also they are stronger like this as they are all equally 1.5 inches thick apart from the middle part which I think is approx 3 inches..
     
  10. Liammonty123

    Liammonty123
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    As these are only meant to do the above 60hz bass frequencies there won't be a lot of air movement in the boxes to begin with anyway. Keep up the good work, seems neater than mine up to now [emoji6]
     
  11. mattkhan

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    You don't need braces that thick, it just adds weight to the box. A rod, like dowel, is sufficient for stiffening the panels.
     
  12. PsyVision

    PsyVision
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    They are about twice as thick as mine, if you squared up the new circles youve drawn...
     
  13. mkohman

    mkohman
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    appreciate your advice, however does it harm to be as they are or shall I make the squares bigger?
     
  14. mkohman

    mkohman
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    Cheers Rich, do you mean I should cut the squares bigger, up to where I have drawn the circles ? Thanks
     
    Last edited: Nov 30, 2017
  15. mkohman

    mkohman
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    Cheers Liam, much appreciated :)
     
  16. mattkhan

    mattkhan
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    No harm done
     
  17. PsyVision

    PsyVision
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    That's what I meant. You could get away with doing that if you believe they might be restrictive. These heavy buggers will be lighter too :)
     
  18. mkohman

    mkohman
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    Christmas has definitely come early [emoji23][emoji106] IMG_20171201_141801243.jpg IMG_20171201_142121007.jpg IMG_20171201_142142218.jpg
     
  19. mkohman

    mkohman
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    The packaging was truly remarkable and you can see that Erich put a lot of effort into it, to ensure that there will be no damage during delivery..

    Back to work tomorrow so won't get much done over these next few days.. Checked all parts arrived safe and sound[emoji106].

    The front baffles fit perfectly on the cabs I built so very happy with that... The tweeters are very well built and quite heavier than what I had assumed.. Here are a few more pics :
    IMG_20171201_142821228.jpg IMG_20171201_142938270.jpg IMG_20171201_144424089.jpg IMG_20171201_144555947.jpg IMG_20171201_145009597.jpg IMG_20171201_145416439.jpg IMG_20171201_145427042.jpg IMG_20171201_150136663.jpg IMG_20171201_150140755.jpg IMG_20171201_151254662.jpg
     
  20. markymiles

    markymiles
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    Congratulations, the baffle looks to be a pretty much perfect fit for your boxes.
     
  21. PsyVision

    PsyVision
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    Yea how good is the fit??
     
  22. Ringnut

    Ringnut
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    All looking good. :thumbsup:
     
  23. mkohman

    mkohman
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    Minor update:

    After work when I arrived home there was still daylight so I thought I may as well adjust the horizontal braces (make the squares larger) and atleast glue on in the cabinet..tomorrow I'll glue in the other two I guess.
    IMG_20171202_164708688.jpg IMG_20171202_164715585.jpg
     
  24. Liammonty123

    Liammonty123
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    Just had a quick listening session of mine this evening. Played sultans of swing, she's already made up her mind, and fortaleza with the receiver on 0db. Using the db meter I had a peak of 112db. On my old speakers 95db would be very painful. 112db on these is a breeze and not in the slightest uncomfortable! Blown away by these and j hope you will be too! Rant over. Good progress btw!
     
  25. mkohman

    mkohman
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    That sounds awesome Liam.. I look forward to hearing them but I've still got a few weeks for that yet I think... I'm really pleased for you and I can only imagine they will get better and better the more you play them as they will gently loosen up and bed in.. I going to concentrate in finishing off the cabinets hopefully in a professional way.. I was considering tuff cab but I'm not sure about it as I prefer a smooth matt black finish.. So what I intend is using leyland acrylic primer undercoat x 2 coats and then spray with matt black paint.. I was considering buying a little electric spray gun but not worth as it's such a small project it will just sit in the garage so I think I'm going to stick with the spray can 500ml matt black 1 can per coat so 2 cans per cabinet total or 6 cans for the job (I think), £5.00 a pop.. It'll cost me £30 for the spray finish which ain't bad..

    I welcome any ideas or reccomendations if I'm going the wrong path about it [emoji106][emoji106]
     
  26. Liammonty123

    Liammonty123
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    Are they going behind a screen?
     
  27. mkohman

    mkohman
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    You, if you check page 2, post #54 you can see my screen and how the cabinets look in the cavity wall.. SO yes they will be going behind screen and I know it's probably a total over kill but I am a little anal like that lol :)
     
  28. Liammonty123

    Liammonty123
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    Sorry it's late and I forgot yours is the cavity wall one with the hinges. Honestly I also anal about getting a perfect finish but now they are behind the screen I have honestly forgotten about them so don't get too flustered if they don't look as good as you like. I'm sure they will though.
     
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  29. mkohman

    mkohman
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    Cheers Liam.. I will try my best and only do what I can .. Thanks for all the tips and advice ;)
     
  30. markymiles

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    How did you find the Stanley Band Clamps? I normally glue and screw but think I might have a go at my two remaining with just glue. Will need to get a couple of band clamps I think.
     

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