DIY Sound Group HTM-12 Build

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

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  1. Liammonty123

    Liammonty123
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    Looking good, however with that band clamp where it is I would avoid tightening to much or you may warp the side panels slightly!
     
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  2. mkohman

    mkohman
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    Thank you for the tip @Liammonty123, I actually notice that straight after taking the picture so I loosened it up.. Seems OK but thank you for noticing [emoji106]
     
  3. mkohman

    mkohman
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    Evening all, I know it's not much to get excited about lol but thought I'd add a couple more photos of the current situation.

    I've just returned home from work and removed all clamps from box 2 and 3 which have been in clamps since yesterday morning so probably about 30 hrs in clamps.. I think this is all I can really do now untill I receive the front baffle and drivers so that I know exactly where to glue in the braces... Anyhow that will be it for a while.. Catch you guys hopefully in a few weeks once I get my delivery and thanks for all the support so far [emoji106] IMG_20171124_200415900.jpg IMG_20171124_200426779.jpg
     
  4. Ringnut

    Ringnut
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    They look surprisingly large, particularly in that first shot, but there again I guess with a 12" bass/mid driver they need to be!
     
  5. kbfern

    kbfern
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    I am intrigued by both Ringnut & mkohman both going down this diy route being that both have been very happy with the XTZ cinemas.

    What sound signature do the DSG give off and how do they compare to the the M6's and to Jon as he has heard the Arendel's how do all 3 compare please.

    I can see the cost advantages of going down this route if the sound is superior to the M6's but for me they would be far too big in my smallish room and DIY is not my forte. I had been thinking of replacing my M6 centre for am M8 but still not fully convinced yet that it is worth the outlay.

    Good luck with the build and would love to hear some of these speakers sometime.:)
     
  6. Ringnut

    Ringnut
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    Hi Keith,

    Well.... :)

    I don't want to derail this thread but I do intend doing a build thread of my own DIYSG build in which I'll cover those points. However in the meantime you are more than welcome to have a listen if you're down this way in the future.
     
  7. kbfern

    kbfern
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    Hi Jon

    I would love to hear them mate, problem is it may be quite some time before I get south of Oxford or even Birmingham come to that:D my days of trolling round the country have been severely curtailed since I became an OAP:laugh:

    If I do I will deffo come and look you up again:thumbsup:

    So get that build thread up if you could and lets see those babies:clap:
     
  8. mkohman

    mkohman
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    Hi Keith,

    Hope your well. Thank you for your kind words. I will definitely write up a review in the future once all built and up and running... Won't be able to do much more at the moment untill parts arrive in approx 2 weeks but will continue to update this thread as soon as I have made progress.

    All the best!
     
  9. mkohman

    mkohman
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    Minor update:

    Just got notification from shipito advising that Package 2 of 2 is ready for shipment to me. The other package (1 of 2) has also been delivered to them, however it isn't in my ready to ship basket as of yet so will probably wait for that to be added before I arrange delivery to me in the UK...
     

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  10. mkohman

    mkohman
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    Other notification has just come in so will arrange both packages now.. I have filled out the customs forms so hope all ok.
     
  11. Ringnut

    Ringnut
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    Just in time for Xmas then... :)
     
  12. mkohman

    mkohman
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    Indeed :) Although on the forwarding delivery with FedEx International 3-6 days delivery it's $150 for package A which I believe has the drivers as it's 50lbs in weight. There are 2 options for insurance:

    1- delivery insurance

    2 - delivery and content insurance (which means they will need to open the package and take individual photos of the items)

    I was planning on going for option 1 as I trust Erich's packaging as I have read nothing but amazing things on his packaging and didn't really want the guys at shipito to start opening boxes etc...

    Unless you guys reccomend option 2? Would appreciate the advice before I continue with the shipment.
    Thanks you:)
     
  13. Liammonty123

    Liammonty123
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    The boxes with the drivers in come straight from eminence I believe and have not been checked by Erich, I could be wrong though. They have no foam just the driver in the box, but mine and others arrived perfectly fine. The larger package containing everything else was packed solid and securely so content inspection wouldn't be necessary. I'd personally go for option 1.
     
  14. Ringnut

    Ringnut
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    I took option 1 for the same reason.
     
  15. mkohman

    mkohman
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    Cheers Liam,

    That was my thoughts too but always good to get others opinions :)
     
    Last edited: Nov 28, 2017
  16. mkohman

    mkohman
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    Thanks @Ringnut .. as always your opinion is valued and appreciated :) option 1 it is then ;)
     
  17. mkohman

    mkohman
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    All done now.. Total delivery cost $261.93.. hmmm little bit pricey I think but hey ho.. it was the cheapest option! :)
     
  18. Liammonty123

    Liammonty123
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    You'll also probably get an invoice from FedEx (that's if you used fedex) in a couple weeks after delivery for taxes. Make sure to email them about the advancement fee of £12 per package as when I complained they waved it off the bill!
     
  19. mkohman

    mkohman
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    Cheers Liam, It was FedEx yes.. Do you remember how much delivery had cost you please out of interest as we have ordered the exact same items?

    Also what is this advancement fee? Cheers:)
     
  20. Liammonty123

    Liammonty123
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    Delivery was around £200 so around 260 dollars. The advancement fee is something FedEx tries to sneak on as part of the handling assuming customers will pay this however we are not liable to so they usually waive it off the invoice so just the actual duties to pay!
     
  21. mkohman

    mkohman
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    Thanks Liam , really appreciate the heads up. Will let you know once I receive the bill ;)
     
  22. PsyVision

    PsyVision
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    Costs sound inline with what I paid last year, I think I gave the breakdown on my thread.
     
  23. mkohman

    mkohman
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    Thank you @PsyVision
     
  24. mkohman

    mkohman
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    As I have now sold my much loved XTZ cinema speakers I thought I may aswell have a little fun and see what the new HTM-12 will look like behind the cinema screen.. Here's a before and after shot lol ;)

    The 1 thing I'm ever so slightly worried about is the waveguide not being on the same level as my ears.. It's going to be slightly above what the m6's were but I'm sitting approx 5m away from my screen and the tweeter will be exactly bang in the middle of my screen so might be ok... I would appreciate any suggestions if you think I should or could do anything to change it up slightly only if necessary as I don't really want to spoil anything in relation to the screen wall.

    Here's my m6's :

    IMG_20171129_123708660.jpg

    Here's the cabs of the htm-12 speakers ;)

    IMG-20171129-WA0009.jpg

    IMG-20171129-WA0007.jpg

    IMG-20171129-WA0010.jpg
     

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  25. Peter Parker

    Peter Parker
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    I wouldn't worry about having them at ear height - in a commercial theatre the speakers are usually placed with the acoustic centre around 5/8ths of the screen eight (they don't care where peoples ears are), but between 1/2 and 5/8ths seems to be the range used for domestic uses depending on the off axis response of the speaker - I think the idea is that the on screen sound matches the video (as it was mastered). Having a Constant Directivity waveguide means the off axis response of the compression driver is still relatively flat, just with the dBs falling with frequency. Worse case would just mean jacking the back of the speakers up a little t angle them toward the MLP but I don't think you have anything to worry about.

    It's probably a bit late now, but had you considered a baffle wall rather than a cavity? It's less flexible than a cavity but does have some benefits.
     
  26. mkohman

    mkohman
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    Thank you @Gary Lightfoot I actually built this whole wall myself when I purchased the xtz cinema speakers and wanted to create a cavity inside the wall with acoustic treatment so that I could use the bottom half to store my electronics.. I agree with what you say and I too doubt it'll be an issue but untill I have things up and running it'll just be a guessing game I guess.. Thanks for taking the time to enlighten me however [emoji106][emoji106]
     
  27. Ringnut

    Ringnut
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    I agree with Gary and any slight off axis drop in the HF will easily be compensated by ARC anyway.
     
  28. mkohman

    mkohman
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    Thank you @Ringnut really appreciate your input..[emoji106] I hope so too as would be a real pain in the backside to start tweaking things around.. Cheers[emoji4]
     
  29. mattkhan

    mattkhan
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    how far above or below are they? it looks like maybe ~1'? if so, at 5m, that's an angle of ~3.5 degrees so is basically irrelevant. The vertical lobes from the crossover will be at at least +/-15 degrees so you have nothing to worry about on that front.
     
  30. mkohman

    mkohman
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    Hi @mattkhan you are absolutely spot on.. It's approx 1 foot higher than the m6's tweeters and my seating is exactly around 5.3 meters from the screen. [emoji106]
     

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