Kuda M8-18k Baltic Birch 8.0cuft Ported Flat-Pack for 18" subwoofers

NOTE: Important pricing information can be found under the 'What's Included' tab. These can be shipped like any other product on the site or on a pallet.

The Kuda™ M8-18k by Denovo Audio is an 8.0 cubic foot subwoofer flat pack made from 13 ply 3/4" Baltic birch.  The cabinet is tuned to 18hz using three extended length 4" Precision Ports. The Kuda has been extensively tested for over 2 years using high X-max subwoofers like the Dayton 18" Ultimax and the Stereo Integrity 18" models along with high powered amps to insure proper tuning with no chuffing noises thanks to the ports placement and massive roundovers.  The cabinet design will work for nearly all other 18" subwoofers and also allows for easy installation of a plate amp on the rear panel. 

Baltic birch plywood yields an extremely solid cabinet with full depth bracing and a reversible 1.5" thick baffle that allows flush mounting or surface mounting depending on your woofers diameter.  A half inch deep recessed cutout of 18.4" allows for most subwoofer frames to be flush mounted.  Some people prefer not to flush mount their woofer, or the diameter is different due to rubber gaskets around the frame.  That's no problem with this enclosure because you can simply flip the two baffles over before gluing them to the cabinet which then allows you to mount your woofer directly on the front. 

Every panel is cut with an automated CNC router so that the pieces fit together perfectly in rabbet joints and dado grooves. Not only does this make assembly much easier and more accurate, but also gives you a stronger enclosure because there's more surface area for the glue to bond to.

This cabinet gives you a net internal volume around 8.0cuft after subtracting the woofer, ports, and braces. The well thought out bracing system allows you to assemble the entire cabinet quickly and easily with no need for screws or nails.  This kit also includes a brace alignment tool to make cabinet assembly incredibly easy.

Product Highlights:

• Made from 13 ply 3/4" Baltic birch that is Carb 2 compliant
• Three custom 4" Precision Ports tune the cabinet to 18hz (or higher if ports are cut shorter)
• Flared ports are used to reduce the port noise known as 'chuffing'
• Full depth braces eliminate all panel flex
• 1.5" thick reversible front panel for added strength
• CNC cut for incredible accuracy
• Rabbet joints and dado grooves help align panels for easy assembly
• Brace alignment tool included for incredibly accurate assembly

Note: I did not have the CNC company cut holes for terminals because everyone likes using something different. Terminals, binding posts, and/or speaker spikes can be shipped for free if you order them at the same time you order this flat pack.

Price Break Down:

Cost: $237.50

Paypal Fee: $8.22

Total Cost: $244.72

Pricing for 1 or 2 cabinets:  $244.72 fully packaged to be shipped by FedEx.  These are heavy cabinets that each ship in two boxes, so shipping is expensive.  If you order two cabinets I will always check to see if it's cheaper for you to ship by pallet.

Pricing for 3 or more shipped on a pallet: $189.32 each plus pallet shipping costs. Please contact me with your zip code and let me know if it's a residential or commercial address. Pallet shipping will likely be around $220 - $310. If it's commercial, let me know if there's a loading dock or fork lift because that's always much cheaper. Shipping costs divide out better if you plan on getting other speaker kits or flat packs with your order. So if you plan on doing that, please let me know in the email.

Picked up in person: $180 each.  Please contact me first then select 'Pay by check or money order' during check out.

Recommended Tools:

• Clamps that open as big as the longest side of the flat pack.
• A mallet (or a small piece of wood and hammer) to lightly tap pieces into place if needed.
• Quality wood glue like Titebond. Some people use PL adhesive.
• Sandpaper or sanding block for smaller cabinets, but a power sander speeds things up a lot.
• Some prefer to use brad nailers for quick assembly, but clamps are just fine with no need for nails or screws.

Assembly Notes:

This is an easy cabinet to assemble and can be done a few different ways.  Believe it or not the panels go together so good that some people have assembled these just using masking tape to hold the panels together.  That's actually what they do in cabinet shops as well.  My directions probably make it sound a bit harder than it actually is, but once you have the panels laid out, you'll see how easy it can be done.  My directions assume you're using a wood glue like TiteBond, Elmers wood glue, or something similar. 

Assembly Tip: When clamping, you don't need to put lots of pressure on the panels, just enough to keep them from sliding around. 

Assembly Tip: Keep in mind that with any natural plywood, thickness can vary a little bit over the sheet.  Any variance on Baltic birch is usually around .01".  So, test fit your braces to be sure they fit in the rabbit joints okay.  If they seem overly tight, just a light sanding along the edge of the brace will be enough to get them to fit easier.  This is 100% normal with any type of plywood.

Assembly Tip: Rabbet joints are purposely cut about 1/64" bigger to allow for user error, slight shifting, excess wood glue, etc. while gluing them up.  Obviously this should be sanded off when your cabinet is completed.  I'd recommend some type of power sander to make the work much easier.

Assembly Tip: Sit the back panel up on something to keep it a few inches off your work bench.  This allows the head of your clamps to fit under the panel so you can clamp the other pieces to it much easier. 

I prefer to glue the braces in first. While clamping them down, make sure they stay between the rabbet joints cut around the rear panel and wipe away any glue that squishes into those grooves so the other panels will still lay in okay.  It's also important to glue them up as square as possible.  They don't have to be 100% perfect, but close.  After about 30 minutes, remove your clamps.  

Next you want to install the top and bottom pieces.  These also fit perfectly between the rabbet joints. Make sure you put glue where they touch the bracing.  Again, let the glue dry for at least 30 minutes before removing the clamps.

After you have the top and bottom on, I prefer to install just *one* side panel at a time.  I've seen people install both side panels at the same time but that will be harder to keep things lined up while clamping. 

Without adding glue, fit the remaining side panel in place.  Depending on how hard you clamped things down earlier, this could need to be tapped into place with a mallet, or a small block of wood and hammer.  Make note of where you need to apply the wood glue, remove the side panel, apply the wood glue where needed, then tap the panel back into place and clamp it down.

Last piece is the outer baffle.  Just put a bead of glue around the edges, then around the woofer cutout, then just drizzle it around the rest of the areas.  Lay the baffle on.  It will slide around a little bit, but don't worry.  Lightly tighten your clamps down while working your way around the box shifting the baffle into position.  If you have a small clamp, you can use it inside the woofer cutout to clamp the inner baffle to the outer baffle.  

Tips:

• Dry fit all pieces together first so you can see how the cabinet is suppose to assemble.
• Don't rush your build. Glue one or two panels at a time to make assembly accurate and easier.
• Use a quality wood glue and put a bead of it anywhere two panels touch.
• Clamp each panel for at least 30 minutes, then move to the next step. (depends on adhesive used)
• Don't over-clamp your panels.  Tighten your clamps enough to hold the panel in place.
• If you're going to add any filler to the seams, sand the edges down flush before adding filler.
• Predrill your woofer screw holes with a 7/64" or 1/8" drill bit.
• Protect your woofer when installing screws. You don't want the screw driver to slip and puncture the woofer!