AVS Forum | Home Theater Discussions And Reviews (https://www.avsforum.com/forum/)
-   DIY Speakers and Subs (https://www.avsforum.com/forum/155-diy-speakers-subs/)
-   -   Far Beyond Driven build LaVoce 21's slot ported (https://www.avsforum.com/forum/155-diy-speakers-subs/3100680-far-beyond-driven-build-lavoce-21s-slot-ported.html)

eng-399 11-06-2019 05:50 PM

Far Beyond Driven build LaVoce 21's slot ported
 
Hey guys back at it again:) this build is for Wayne out in Madison Wisc. he's using the LaVoce 21's for drivers and I'm building his boxes. What he has is a box from @Red Five already that's for nearfield and I'm building 2 slot ported boxes for the front of his room.

Box is 25w/26d/38h which is 11 cubic ft and tuned at 17hz.

Once this is done I'll be incorporating The mini dsp DDRC-88A and Mini dsp 2/4hd with Dirac live for both speakers and LFE channel in his Theater room.

Let the build begin

eng-399 11-06-2019 05:53 PM


eng-399 11-06-2019 05:56 PM

Wayne can you post what your room looks like and your equipment.

a77cj7 11-06-2019 06:13 PM

Looking good as usual. Any functional reason for the narrower port, or strictly aesthetic?

Chris



Sent from my iPhone using Tapatalk

eng-399 11-06-2019 06:18 PM

Quote:

Originally Posted by a77cj7 (Post 58785776)
Looking good as usual. Any functional reason for the narrower port, or strictly aesthetic?

Chris



Sent from my iPhone using Tapatalk



Hi Chris since the box is 25” wide the first port resonance didn’t look that good being the wide even with some port rails. I needed to keep the first port resonance in check so having a port a 17” wide 3” tall and 41.5 inches long ended up looking really nice on winisd. The air port velocity was low as well. I’ll post all that stuff soon[emoji3]. The plan is to flush trim bit the port out of the first and second baffle. Should look real nice when I’m done.

a77cj7 11-06-2019 06:25 PM

Quote:

Originally Posted by eng-399 (Post 58785794)
Hi Chris since the box is 25” wide the first port resonance didn’t look that good being the wide even with some port rails. I needed to keep the first port resonance in check so having a port a 17” wide 3” tall and 41.5 inches long ended up looking really nice on winisd. The air port velocity was low as well. I’ll post all that stuff soon[emoji3]. The plan is to flush trim bit the port out of the first and second baffle. Should look real nice when I’m done.



Ahh, makes sense. I always forget about the resonance issues.
I used a flush trim on baffles for a port that style on my last (and only) ported build. I would recommend jig sawing it most of the way first. Killed a flush trim bit by trying to take too much material.
I did think the look turned out really good though.

https://uploads.tapatalk-cdn.com/201...8fa327322a.jpg

Chris


Sent from my iPhone using Tapatalk

EndersShadow 11-06-2019 07:05 PM

Mike..... do you wonder how much MDF dust there is in your lungs at this point lol.....


Sent from my iPhone using Tapatalk

smcmillan2 11-06-2019 07:52 PM

Quote:

Originally Posted by a77cj7 (Post 58785814)
Ahh, makes sense. I always forget about the resonance issues.

Ditto here, resonances is one of the things a look for when dancing with the model. As you already know, it can be quite the workout!

Quote:

Originally Posted by a77cj7
I used a flush trim on baffles for a port that style on my last (and only) ported build. I would recommend jig sawing it most of the way first. Killed a flush trim bit by trying to take too much material.
I did think the look turned out really good though.

Did you go through (what looks to me in that pic) 2 layers at once? Yeah, that will tax a trim bit quickly. I usually run them separately, first on the inner baffle then again once the outer has been applied. Much easier on the router/bit (and faster for me).

I built my first 5 - 6 subwoofers with a slot port in the fashion Mike is putting these together. Always liked the look, and they tuned almost exactly as they modeled. Doesn't really add to the thread, but like seeing the same method used here!

a77cj7 11-06-2019 08:02 PM

Quote:

Originally Posted by smcmillan2 (Post 58786164)


Did you go through (what looks to me in that pic) 2 layers at once?


No, cut the first then glued on the second. My routers are all 1/4, so can’t run one of the taller flush trim bits anyways.

Hope we’re not derailing your thread too much @eng-399

Chris


Sent from my iPhone using Tapatalk

smcmillan2 11-06-2019 08:14 PM

Quote:

Originally Posted by a77cj7 (Post 58786210)
No, cut the first then glued on the second. My routers are all 1/4, so can’t run one of the taller flush trim bits anyways.

Ahh, yeah, that certainly limits how much you can run through at once. I use one of my 1/2" collet routers to hog out those openings, and that still puts a burden on the bit.

Quote:

Originally Posted by a77cj7
Hope we’re not derailing your thread too much @eng-399

Agreed. Although sharing is caring!

dltnjarrel 11-07-2019 05:12 AM

Quote:

Originally Posted by a77cj7 (Post 58785814)
Ahh, makes sense. I always forget about the resonance issues.
I used a flush trim on baffles for a port that style on my last (and only) ported build. I would recommend jig sawing it most of the way first. Killed a flush trim bit by trying to take too much material.
I did think the look turned out really good though.

https://uploads.tapatalk-cdn.com/201...8fa327322a.jpg

Chris


Sent from my iPhone using Tapatalk

What size round over did you use here?

Sent from my SM-N950U using Tapatalk

Red Five 11-07-2019 05:33 AM

Looking good Mike :)

a77cj7 11-07-2019 05:40 AM

Quote:

Originally Posted by dltnjarrel (Post 58787112)
What size round over did you use here?

Sent from my SM-N950U using Tapatalk


3/8in.

Chris


Sent from my iPhone using Tapatalk

eng-399 11-07-2019 05:56 AM

Quote:

Originally Posted by smcmillan2 (Post 58786164)
Ditto here, resonances is one of the things a look for when dancing with the model. As you already know, it can be quite the workout!



Did you go through (what looks to me in that pic) 2 layers at once? Yeah, that will tax a trim bit quickly. I usually run them separately, first on the inner baffle then again once the outer has been applied. Much easier on the router/bit (and faster for me).

I built my first 5 - 6 subwoofers with a slot port in the fashion Mike is putting these together. Always liked the look, and they tuned almost exactly as they modeled. Doesn't really add to the thread, but like seeing the same method used here!

I'll only go through one layer of mdf with my flush trim bit at a time. I need to get more pics posted of this build today.

eng-399 11-07-2019 06:11 AM

Dry fitting bracing and all the holes cut[emoji3]. As you can see on one of the braces my flush trim bit Allen screw on top of it came lose as the washer that guides the bit along the wood wore out glad I didn’t cut my finders off when hit the side of the brace[emoji54]

I cut strips of mdf and pin nail it to the brace then take my flush trim bit to make all my window braces...https://uploads.tapatalk-cdn.com/201...d3cae3c433.jpghttps://uploads.tapatalk-cdn.com/201...bd2a9c677f.jpghttps://uploads.tapatalk-cdn.com/201...3a587e4a33.jpghttps://uploads.tapatalk-cdn.com/201...6fd076f144.jpghttps://uploads.tapatalk-cdn.com/201...9387fa65e9.jpghttps://uploads.tapatalk-cdn.com/201...c8bee060f9.jpg

Hometheater Marine 11-07-2019 07:58 AM

7 Attachment(s)
Quote:

Originally Posted by eng-399 (Post 58785708)
Wayne can you post what your room looks like and your equipment.

Sorry I’m late to the party guys. I’m new to the DIY sub group and have met some really great people along the way. I want to say thanks to SOWK for starting me down this rabbit hole. He introduced me to @Red Five who I had a great time talking to and eventually met with and purchased his Storm breaker sub with the B&C 21” driver. He should have named it “Back breaker”. It’s incredibly built and a monster which will serve as a near field right behind my seating position. I was also introduced to @eng-399 . I was looking for 2 more DIY subs to replace the 2 SVS SB-16 sealed subs that I currently have, but didn’t have the tools, time, patience or technical expertise to do a DIY build so after talking to Mike (eng-399) and then driving to Illinois to meet with him I could tell that he was the one I wanted to do my build. He’s not only knowledgeable but has a genuine enthusiasm and passion. He comes highly recommended and I can see why. I didn’t want to keep upgrading so Mike convinced me to add 2 more 21” subs in front. Total overkill for a 13x18 room but there would be no need for future LFE upgrades in that room. We discussed the design goals and details and with the room being so small for such incredible low frequency firepower, I needed to have as much LFE control as possible. I also wanted to have synergy not only with 3 21” subwoofers but also with my mains as well.
Enter the Minidsp DDRC-88A with bass management plugin and Minidsp 2X4HD.

My room isn’t large like what a lot of you guys have but I’ve crammed a lot in there.
Here’s the room dimensions and equipment.

Room 13x18
3 Seaton Sounds Catalyst powered mains
M&K SS250 side surrounds ( non powered )
2 Adams A7X powered studio monitor rear surrounds
10’ Wide 2:35 screen
ISCO III Anamorphic lens
Cineslide motorized transport for ISCO lens
JVC RS500 projector
Marantz 7703 pre-pro
OPPO 203 4K universal player
Lumagen 4K video processor
2 SVS SB-16 sealed subs ( to be deinstalled just before upgrade )
1-Storm breaker 21” sub- installed behind seats.
2-21” subs with LaVoce drivers- currently being built
1- Chane 3600 sub amp in bridged mode for 21” nearfield sub.
2 NX3000 DSP sub amps for 2 21” subwoofers up front

EndersShadow 11-07-2019 08:01 AM

^Love my Chane 3600 amp! Just need to get the second one up and running so I can bridge em to my JBL CS1214's...

Sorry for the threadjack...

JCJetta 11-07-2019 10:46 AM

First off, as per your username, thank you for serving.

Looks like Santa Mike is bringing you the gift of bass this Christmas! You cannot go wrong with Mike's builds; I cannot wait to get the setup he built me back into a proper room again. This is gonna be a fun one to follow, especially with the recent popularity of these hot Italian beauties, no doubt pushed into the spotlight by Mike himself.

Hopefully the weather will cooperate when it is time to transport those monsters home.

johnson636 11-07-2019 10:54 AM

Quote:

Originally Posted by JCJetta (Post 58788540)
especially with the recent popularity of these hot Italian beauties, no doubt pushed into the spotlight by Mike himself.

Yes he did:)

jevchance 11-07-2019 12:11 PM

Quote:

Originally Posted by Hometheater Marine (Post 58787710)
I didn’t want to keep upgrading so Mike convinced me to add 2 more 21” subs in front. Total overkill for a 13x18 room but there would be no need for future LFE upgrades in that room.

This part is adorable. :D Welcome to the fold!

eng-399 11-07-2019 08:38 PM

The 21” crazzz——. For whom the bell tolls—
This was the moment for me.

Story time fellas [emoji2]


I remember when I first had everything going mtg90 and myself were in my room and just got the 21’s going. Integration started rew Audy ect ect...
I remember putting on the Metallica Blu-ray Disc and playing for whom the bell tolls[emoji16]. The volume started creeping up louder and louder the sound of the kick drum was insane. The pod lights in my just started raining drywall dust down from the ceiling we getting the chest slam right into or gut long with the rest of the kirks awesome guitar licks going and then James starts singing. Wow was that a moment I know these 21’s were the real deal! It’s something that just needs to be heard live in concert or in a theater room loaded with 21’s. I’ll always remember that moment and tell that story to anyone in person that’s been over. The John wick gun battle was another that was just fun to hear and feel. These 2-‘s are different than other drivers like the ht-18’s or hst line but man it’s been a fun ride having these drivers. I can’t wait for Wayne to hear them to.

Dan ya dude my lungs are probably filled with mdf[emoji45]. I now a mask sanding all the time.

Picture time
https://uploads.tapatalk-cdn.com/201...e8da9e6a25.jpghttps://uploads.tapatalk-cdn.com/201...f0de1a2aac.jpghttps://uploads.tapatalk-cdn.com/201...e601e8dc58.jpghttps://uploads.tapatalk-cdn.com/201...90a376f5a7.jpg

OJ Bartley 11-08-2019 08:59 AM

Mike, another Pantera themed sub build? I love it! Wayne, you are in very good hands here, and I'm sure that these, along with a third 21(!) will just crush your room. But in a good way. I'll be watching this one.

Oh, and Mike, I love the stories behind the motivation. My first big OMG HT moment was with my old faithful 15" Tempest when it was new, and firing up the end of Fight Club for the first time. Like you, I'll never forget it.

jevchance 11-08-2019 01:13 PM

I might be dating myself here, but I remember getting my Eosone home theater set up at my college apartment, and my roommate firing up the original Star Wars trilogy on laserdisc. The room was tiny and that little 10" could really get things rockin.

Quote:

Originally Posted by OJ Bartley (Post 58792454)
Mike, another Pantera themed sub build? I love it! Wayne, you are in very good hands here, and I'm sure that these, along with a third 21(!) will just crush your room. But in a good way. I'll be watching this one.

Oh, and Mike, I love the stories behind the motivation. My first big OMG HT moment was with my old faithful 15" Tempest when it was new, and firing up the end of Fight Club for the first time. Like you, I'll never forget it.


eng-399 11-08-2019 05:16 PM

@OJ Bartley
@jevchance

Fight club scene and Star wars movie it's CRazY how we can all relate to this we all have movie clip or moment in our rooms that makes us smile. Who doesn't like a good story to tell your friends it's like buying a classic car with a story behind it.

eng-399 11-08-2019 05:19 PM

Far Beyond Driven build LaVoce 21's slot ported
 

smcmillan2 11-08-2019 05:34 PM

Quote:

Originally Posted by eng-399 (Post 58794612)
More pictures, Tomorrow the second baffle will go on.

No MDF dust there, well done!

:D

Hometheater Marine 11-08-2019 05:48 PM

6 Attachment(s)
This guy seems to be working at warp speed. Now that I have most of what I need including odds and ends I better get my tail in gear this weekend. I know I received a link from another AVS forum member about how to wire up the 4 pin Noctua fans but I can’t seem to find it. If anyone has it could you please link it to me. I hope this fan upgrade doesn’t become a big project. It’s just one of the many things on my to do list this weekend.

Red Five 11-08-2019 09:06 PM

Mike, what grit do you like for tearing down the MDF? Does too much speed gum the paper up faster?

eng-399 11-09-2019 09:54 AM

Quote:

Originally Posted by Red Five (Post 58795172)
Mike, what grit do you like for tearing down the MDF? Does too much speed gum the paper up faster?

I use a flush trim bit first then jump on my orbital sander with 50 grit sandpaper. After that 120 and 220 to finsh

LTD02 11-09-2019 07:19 PM

nice work mike, as always.


All times are GMT -7. The time now is 03:52 AM.

Powered by vBulletin® Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
vBulletin Security provided by vBSecurity (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.