Home Forums DIY Speakers and Subwoofers Cinema6…but with different drivers?

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  • #14716

    unahm
    Member

    I stumbled across the video of the Cinema6 design, and was really impressed with the response and the ease of the build. I’m in-between projects, but before I commit to any further woodwork I wondered if it would be possible to build this design using the components I have. It’s an age-old question that every speaker designer receives regularly I know, so I apologise in advance 🙂

    The drivers I currently have (which would make a stero pair) are:

    2x Yamaha JA-6681B 1.4″ exit compression drivers
    4x Eminence Alpha 8a 8″ cone drivers

    I certainly would be happy to buy plans for this design, but with the compression drivers being relatively rare it might be difficult to mate them to a suitable horn.

     

    Thanks in advance for anyone’s help!

  • Cinema6…but with different drivers?

  • ajc9988

    Member
    November 14, 2021 at 9:20 pm
    Posted by: @unahm

    I stumbled across the video of the Cinema6 design, and was really impressed with the response and the ease of the build. I’m in-between projects, but before I commit to any further woodwork I wondered if it would be possible to build this design using the components I have. It’s an age-old question that every speaker designer receives regularly I know, so I apologise in advance 🙂

    The drivers I currently have (which would make a stero pair) are:

    2x Yamaha JA-6681B 1.4″ exit compression drivers
    4x Eminence Alpha 8a 8″ cone drivers

    I certainly would be happy to buy plans for this design, but with the compression drivers being relatively rare it might be difficult to mate them to a suitable horn.

     

    Thanks in advance for anyone’s help!

    Yes and no. You can adapt it from the design, but you cannot just cut the holes bigger, etc. You have to setup the volume of space and the ports for the drivers. Swapping in a different horn also depends on the wave guide you get for the 1.4″, or if you use an adapter to 2″ (see here). But you have to redesign once you get the dimensions of the wave guide, because that effects depth of the compression driver, etc.

     

    Here are some examples of horns.

    https://www.parts-express.com/LaVoce-HD1403-1.4-Cast-Aluminum-Constant-Directivity-Horn-80-x-60-4-Bolt-293-744

    https://www.parts-express.com/B-C-ME90-1.4-Constant-Directivity-Horn-80×60-4-Bolt-294-626

    https://www.parts-express.com/FaitalPRO-LTH142-60-x-50-Elliptical-Tractrix-Horn-1.4-4-B-294-1042

    https://www.parts-express.com/B-C-ME464-1.4-Constant-Directivity-Horn-70×55-4-Bolt-294-6184

    So, after you figure out the wave guide/horn situation, you would then have to figure out spacing with the 8″ drivers. Also, you then adjust internal volume for the box criteria according to what your drivers need and your box frequency needs adjusted. This then effects the port lengths on the box (which I would have to look how well those drivers do in a ported box versus closed box, etc.).

    After that, you adjust internal structures like bracing, add volume if adding insulation, then make sure the open space meets the calculated box volume.

    So there is a lot of design that goes into it, not a simple swap of components, if being honest.

     

    Cinema6…but with different drivers?

  • unahm

    Member
    November 14, 2021 at 10:11 pm
    Posted by: @ajc9988
    Posted by: @unahm

    I stumbled across the video of the Cinema6 design, and was really impressed with the response and the ease of the build. I’m in-between projects, but before I commit to any further woodwork I wondered if it would be possible to build this design using the components I have. It’s an age-old question that every speaker designer receives regularly I know, so I apologise in advance 🙂

    The drivers I currently have (which would make a stero pair) are:

    2x Yamaha JA-6681B 1.4″ exit compression drivers
    4x Eminence Alpha 8a 8″ cone drivers

    I certainly would be happy to buy plans for this design, but with the compression drivers being relatively rare it might be difficult to mate them to a suitable horn.

     

    Thanks in advance for anyone’s help!

    Yes and no. You can adapt it from the design, but you cannot just cut the holes bigger, etc. You have to setup the volume of space and the ports for the drivers. Swapping in a different horn also depends on the wave guide you get for the 1.4″, or if you use an adapter to 2″ (see here). But you have to redesign once you get the dimensions of the wave guide, because that effects depth of the compression driver, etc.

     

    Here are some examples of horns.

    https://www.parts-express.com/LaVoce-HD1403-1.4-Cast-Aluminum-Constant-Directivity-Horn-80-x-60-4-Bolt-293-744

    https://www.parts-express.com/B-C-ME90-1.4-Constant-Directivity-Horn-80×60-4-Bolt-294-626

    https://www.parts-express.com/FaitalPRO-LTH142-60-x-50-Elliptical-Tractrix-Horn-1.4-4-B-294-1042

    https://www.parts-express.com/B-C-ME464-1.4-Constant-Directivity-Horn-70×55-4-Bolt-294-6184

    So, after you figure out the wave guide/horn situation, you would then have to figure out spacing with the 8″ drivers. Also, you then adjust internal volume for the box criteria according to what your drivers need and your box frequency needs adjusted. This then effects the port lengths on the box (which I would have to look how well those drivers do in a ported box versus closed box, etc.).

    After that, you adjust internal structures like bracing, add volume if adding insulation, then make sure the open space meets the calculated box volume.

    So there is a lot of design that goes into it, not a simple swap of components, if being honest.

     

    Yes, definitely lots to consider. I think I’ll have to wait until I can afford the original drivers in the Cinema6, and continue the course with my existing project. It could be done, but it’s essentially a brand-new design. Thanks!

  • tvor-ceasar

    Moderator
    November 14, 2021 at 10:17 pm

    Is the compression driver really a 1.4″ or is it a 1.375″? If the latter, it’ll fit any standard 1-3/8″ mouth horn.

    So you have any specs on the drivers? That’ll let you determine if the box will work.


  • unahm

    Member
    November 14, 2021 at 10:53 pm

    There doesn’t appear to be much out there on this particular compression driver, but the best information comes from the one and only Joseph Crowe!