LaVoce SAF184.03 Tower Subs - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 9 Old 09-20-2019, 02:00 PM - Thread Starter
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LaVoce SAF184.03 Tower Subs

Hello all,
After a few years of lurking here and being amazed by many of your setups and living with 2 sealed 12" subs (TC Sounds TC+2's), I have finally hit the upgrade button!

After that excellent post that informed us about the sale on the LaVoce drivers at Parts Express, I snagged 2 of the 184.03 18" subs.

I played around a bit in WinISD and was going to go with Mini-Marty sized boxes, but decided I wanted them to be behind the screen so that I can have a "baffle wall" like @sassuki , @Jk7.2 , @eng-399 , and many others, so I figured my depth needed to be around 18".

I bookmarked the thread where @rchris put his LaVoce 21's in a slim box designed by @LTD02 , and I decided to just use that box.

So I broke out the cutlist optimizer and ordered 6 sheets of baltic birch (5X5 sheets). I hate MDF and the dust, so I splurged. I joined a makerspace, and one of the members is a cabinet maker so he sourced me the sheets for just under $50/sheet Canadian!! The wood stores were selling sheets at about $80-95 each, so this was a huge win.

After doing tools training at the makerspace, I started cutting last night and after a couple hours and some help, I had 4 front/backs, 4 sides, 4 tops and bottoms, and some sore muscles after loading the pieces into my vehicle (no place to store at the space).

In the photos you will see 1) birch sheets ready, 2) shot of the wood shop in the makerspace, 3) parts cut, 4) parts in the vehicle 5) WinISD shots

Also, forgot to mention, I am going to modify the box. After ripping all the parts, with the fronts and sides being 60" in length (the stock sheet length) I figured why cut them down. Height isn't a restriction behind the screen, so the boxes are going to be 24 X 19.5 X 60 external dimensions. Port is 2.5" X 21" X 40" which will tune it to around 17hz.

Next steps are to miter the top/bottoms and sides and get those glued up. First have to make a miter sled to help with the large panels. Will be based on New Yankee Workshop Norm's crosscut sled, but will just use the 45 degree cut.

Thanks for looking

Thanks to whoever posted about the LaVoce sale, all the bad influencers around here, and to LTD02 for the design.
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post #2 of 9 Old 09-21-2019, 06:48 AM
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Are you going all out and ordering a clone amp? How will you power these? You are in for a real surprise. Coming from 2 12” sealed subs these will be unreal. Thanks for the mention and glad to see others going nuts with subs.
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post #3 of 9 Old 09-21-2019, 08:19 AM - Thread Starter
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Quote:
Originally Posted by Jk7.2 View Post
Are you going all out and ordering a clone amp? How will you power these? You are in for a real surprise. Coming from 2 12” sealed subs these will be unreal. Thanks for the mention and glad to see others going nuts with subs.
The clone route is definitely tempting but I just don't think I would need that output.

In WinISD these were pushing excursion limits at around 1500 watts (at 18mm xmax which is higher than the spec) and port speed was around 35.

The sealed 12's I had were being powered by a 2X250w IRS2092 based chipamp on an Abletec power supply rated for 800w, but I think the amp was probably not pushing even close to 250w per channel. That said, for what the wife and I watch(ed) movies at, usually like -25 on the receiver, the amp didn't clip except for a few times.

Now, in the new house which has a dedicated theatre room (15' X 17'), along with extra sound insulation in the walls and ceilings, I'm hoping that our listening volume habits will go up. Mine will at least! I was looking at an NX3000d thinking that will probably be enough juice.

Go ahead and talk me out of it though!
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post #4 of 9 Old 09-21-2019, 01:31 PM
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LaVoce SAF184.03 Tower Subs

I'm kinda worried about a 2.5" tall port. Port speed at 35 m/s is too high. I would not go past 24. It may not chuff unless at high SPL but will likely cause port compression and rob output. @LTD02 am I mistaken here?

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post #5 of 9 Old 09-24-2019, 12:39 PM - Thread Starter
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Originally Posted by corradizo View Post
I'm kinda worried about a 2.5" tall port. Port speed at 35 m/s is too high. I would not go past 24. It may not chuff unless at high SPL but will likely cause port compression and rob output. @LTD02 am I mistaken here?
A quick change to 3" or so gets it down around 25 m/s, so I will do the taller port. Tune goes up ever so slightly to around 18hz according to WinISD. Just in case I get unduly influenced again and go for the NX6000 or a clone... lol you guys
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post #6 of 9 Old 09-24-2019, 12:43 PM - Thread Starter
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Got a bit more done last night.

I made a crosscut sled for the bevel/miter cuts. I took the pics of the sled but forgot to take one of all the now bevelled parts. But, tops, bottoms, and all sides now are 45 degree cut and ready to glue once I cut some inner brace pieces that will keep it all square for glue up.

Again, I've found that using the miters for the glue up helps immensely since I don't have a nailer. I would use pocket screws but I want to do some roundovers to finish it off, so pocket screws are out.

I will use the packing tape method for gluing it all up.
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post #7 of 9 Old 09-24-2019, 04:13 PM
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Very nice shop!
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post #8 of 9 Old 09-25-2019, 06:13 AM - Thread Starter
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Very nice shop!
That is the "Makerspace" I am a member of. For the cool price of $55/month and a couple hours of training on the machines, I can use all of those woodworking machines. There are other areas with oscilloscopes, 3d printers, a full metalworking shop with big milling machines, there's welding, there are laser cutters, and who knows what else yet! It's honestly a pretty sweet deal. Even when my shop is back up and running I may stay on as a member since it is way easier to find time to go there after the kids are in bed then to figure out when to run my own tools at my house.
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post #9 of 9 Old Yesterday, 08:25 PM - Thread Starter
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Ok more progress!

One box is ready to just add bracing and then do the baffle cuts.

So the 5 sides and the port are done, just will add quite a bit more bracing, then will get the baffle started.
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