"THE" DIYSG Helix Build - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 3 Old 06-18-2019, 04:47 AM - Thread Starter
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"THE" DIYSG Helix Build

Here we go. I finally got my LCR Helix's finished this passed weekend. I had a good time building and planning these things out, but it was a tad frustrating getting these things finished the way that I wanted. I think that when I got to the finishing stage the first time, I just wanted to get them put together so I could hear them. Doing that was a mistake cause they looked like ****. You'll see. So, I ended up stripping them back down and finally got them to the finish that I originally planned on doing. Pretty happy with them now. I built them out of 3/4" baltic birch and decided to front port them. They turned out pretty good. Cool thing was is that I was able to CAD them up to perfection. I'll include a pic of the CAD if anyone wants to use it. The pic references using a full sheet of (1) 4x8 sheet of BB and (1) 2x4 sheet of BB. I needed front ports for my room cause speaker placement in my HT gets kinda boomy with rear ports. For the dimensions of the front ports, I just calculated the surface area of the diameter of the round ports that were included. Took that number and translated it to a rectangle (maths). Ended up with a .625" tall x 9.5" wide x 6" deep port with a filleted front, top and bottom. They are lightly stuffed with polyfill. I used 1 pillows worth from Target split between all 3 cabinets. Front ports help with that boomy-ness that I get in my room. I really need some room treatments, cause right now, its just alot of flat walls. Setup is just 3.0 for now. It will eventually become a 5.4.1., possibly a 7.4.1, thats up in the air. My subs plate amp went out so I need to replace it and I will also replace the driver turning it into a Flex-12. Luckily the dimensions of my current box are very close to whats needed for a flex-12. Thats my next project.

Some quick listening impressions before I start dumping pics in here. They sound pretty damn good, great highs, great mids and great lows. I am a 80 music and gaming to 20 music kinda guy. I do like to get some music listening time in here and there, and I will say that they are pretty good at music. They don't take the cake from my previous tempests though. My previous setup was a pair of tempests and a quad 4 center with a pair of volt 6's. I really wanted a matching LCR, that's why I got rid of them but, I do kinda miss the output of the tempests. I really enjoyed them. Moving forward though, finally having a matching set of fronts is where it's at. It just sounds seamless and the soundstage sounds really good. The helix's do a pretty dang good phantom center. You get that tingly feeling inside of like you have to stand up and stick your ear up to the center channel to really see if it's on or off, deep down you know it's off, but you still get up anyways..... then you just sit back down and smile. You know what I'm talkin' about. The helix's sound great for HT use, they're really crisp and clear.

Comparing them to the tempests, they can play as low but not with as much authority, i feel. The highs are just about as good as the compression drivers from the tempests but the CD's are slightly more transparent. I feel the Helix's have better vertical dispersion than the CD's cause I remember standing up while listening to the tempests and you kinda lose that magical soundstage, but the domes dont lose it as much. Off axis listening is pretty even. Comparing them to the tempests is a tough comparison cause they are quite different but having a set of MTM's that you can say can hang with the tempests is saying something. The domes in my opinion sound really good. My setup before my tempests were the Fluance XL7F's. Those had a silk dome that would really give me ear fatigue after a bit of music listening but the tweets in the helix dont do that, they are very good. Very happy with them on that front. Erich also mentioned that Jeff Bagby was very impressed with these tweeters and were some of the best he has worked with. I can agree with that. Kudos to Jeff, he designed a great speaker, thank you Jeff. The helix's are pretty damn good and worth the money in my opinion. I originally wanted the Apollo's but after speaking to Erich, he stated that I wouldn't be missing much by going with the helix's. Just a few extra Hz in the low end. I'm sure the Apollo's sound great though. I'd still be waiting on those Apollo's and I just had the itch to build something new. Thanks Erich, you helped me make a fine choice. I will shut up now, here ya go, some pics, Enjoy.
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Erich H, neo_2009, Jk7.2 and 3 others like this.

Last edited by Rickreagan120; 06-18-2019 at 05:45 AM.
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post #2 of 3 Old 06-18-2019, 07:38 AM
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Those cabinets look fantastic. Did you build your own screen? Looks fantastic.

--
Epson 2030 - Denon X1300W - Eosone RSF 1000 - Eosone RSC 300 - Eosone RSF 600 - Micca M-8C for ATMOS - 2 @ VBSS End Tables
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post #3 of 3 Old 06-18-2019, 07:54 AM - Thread Starter
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Quote:
Originally Posted by jevchance View Post
Those cabinets look fantastic. Did you build your own screen? Looks fantastic.
Thank you, and yes, I built the screen using some 1x4's and bought some blackout cloth remnants from Carlofet.com. Total was around 50$ for the whole thing. Then, I painted it with Home Depot silver screen paint. Just rolled on a couple of coats. I worked really well. I want to build some new console shelving so I can lower the screen a bit. Its just slightly too high.
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