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Cinema 10 Build Log
updated 10 hours, 58 minutes ago 6 Members · 20 Posts
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All right guys here’s some teaser pics of the flat back that I built for the Cinema 10. I have some other pictures of them completed, I just don’t have them on hand. I’ll try to update this later.
Build Video:
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Looking forward to seeing these completed! Will probably end up replacing my surrounds with them 😀
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I finally got around to getting some pictures of the final build (not painted). These are very thin. Only 8 in deep.
The off-axis performance is unbelievable. Making them perfect for rear surrounds. I decided to make my own ports. But you could use premade ones.
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@123toid They look great! But Nick, please add some flares to the ports. With none at all, chuffing starts at such low velocities, as I’m sure you are aware. A program called Flare-It works really well. Take the velocities from win-ISD and enter them into the program, there’s spaces for 20,25,30 and 35hz, since it is designed around a port that has a peak at 35hz, it can be translated so that the peak value is substituted into the 35hz spot and the rest of the values are in steps of 5hz, each below the last value. I have found it to be very accurate, I only came across it recently when researching port turbulences.
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@elliottdesigns that’s a great point about flaring the ports. This particular design doesn’t need the ports flared. There’s multiple reasons for this. But one of the things that you want to keep in mind when looking at Port velocity of a speaker is to type in your high pass that you intend to use. In this case, these speakers are designed for surround sound use and will never be crossover lower than 80 Hertz. At least the design for this is we crossed over no later than 80 Hz.
Another thing to keep in mind is that if you do round over the ports, you do lose port length. So you’ll need to lengthen the port approximately half of the flare.
Finally another thing to think about with flared ports, is it to get maximum Port velocity, you actually should flare both ends. They’re definitely times where flared ports are needed and necessary. But in this particular case a flared port isn’t. However if you really wanted to do it for looks, you definitely could.
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@123toid Thanks, Nick, I am aware of those things about ports already, but not that you are using an 80hz highpass on those, it makes sense now, thank you. It’s probably good you mentioned those points anyway as it will most likely help others 👍
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It’s a great point. In fact I believe that a lot of beginners don’t take into account for port velocity and or power handling. And I really don’t believe a lot of beginners take into account there high pass and how that will affect it. I think it’s an absolute great point. They’re very easy things to overlook.
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@123toid The order and even type of highpass can make a considerable difference too, and I believe they are missed even more often!
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Here are some completed pictures. Family health recently has gotten in the way of me finishing editing the video. It will be out this Sunday.
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@123toid Hope everything is ok at home now Nick (wellness wise).
As for the speakers, they look great, loving the build quality and the colour too (even if it’s not really for my decor 😂)! I’d worry a bit about port turbulences though, there doesn’t appear to be a flair (unless I missed it, images are quite contrasty), there’s actually a lot of really interesting engineering as to why flairs are so important, even if just small. It’s to do with how the boundary changes between the enclosed space of the port and the comparatively infinite space it opens into, also known as a part of the boundary layer effect. I won’t go far into it (unless people ask of course), but I thought it worth mentioning.
I know with this speaker, the lack of flare is probably needed since there’s no more room on the baffle for conventional ports, and you’d mentioned previously how it’s not really necessary when crossed over high enough to a subwoofer. However, I’d be more than happy to model up some ports that make better use of space on the baffle so the port area can remain the same whilst allowing for a flare. I’ve done this with 3d printing with great success in the past, just let me know, it might be a nice upgrade in the future or maybe for a V10.5?
Loving the cinema series style! Keep it up!
Elliott
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@123toid Did some quick digging and it looks like I could get the KPT-8000M for ballpark $1000 and the KPT-1200m is around $1200. However I dont know if this is inclusive of taxes as im in the UK. My guess would be that figure is the list price with no taxes applied
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Could be. Of course, theaters typically buy in bulk. Multiple screens at once. Of course, we can’t even buy them unless we own a movie theater…I don’t think they’ll count my home theater 🤣🤣🤣🤣
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Of course. I should point out I got that price based on if I were buying multiple to install in a movie theatre in dubai then converted from AED to GBP to USD. I cant get them shipped to my front door at home either haha
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This reply was modified 1 day, 18 hours ago by
Chedwin.
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oh wow! That was a lot of work on your end. I appreciate it!
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This reply was modified 1 day, 18 hours ago by
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Here is the sound Demo: KEEP IN MIND THIS WAS TAKEN WITH A GO PRO.
I don’t think I’ll rerecord it, but here is the best for now.
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Nick, which songs are this? so i can play this on my current speakers to hear the differenc
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Michael Buble – Fever
Whitney Houston, I’ll always Love You
Just keep in mind, this is being recorded with a Go Pro and being compressed by YouTube, so it definitely isn’t a one to one recording.
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i know
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Bought the plans yesterday- look awesome. Looking forward to building them.
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Awesome! Can’t wait to see the finished project!
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