OK for FRONT and a SIDE firing port in same Cabinet pic?

Hi I am busy making speakers as in pic but due to limited space in the design I need to put my mid range port at top of the cabinet on the side (cabinet is wider than it is deep) for adequate clearance to the rear of port.

The lower port for the bass I want to put on the front under the bass driver it won't have enough clearance to back of cabinet either but I have room there to put a 90 degree elbow in it

Is it OK to have a side and front firing port on the same cabinet?
Please ignore marks it has been altered a number of times.

IMG_20210717_094725_661.jpg
 
Ported midrange?

Am I doing this the wrong way? I have a dividing MDF panel in the cabinet to separate my bass woofer from my mid? I'm not sure if this the correct way to do it? The reason for it was that I was able to do calculations online for each separate compartment. As a result I have both mid and bass ported?

Am I doing it wrong? I would certainly prefer to have my mid
Compartment sealed if that is viable as it would leave me much more room for my ported bass section?
What would be best. How is it normally done?
Regards
Tim
 
frugal-phile™
Joined 2001
Paid Member
MDF’s great “superiority” is a significant achievment of the marketing department. Its only real advantage is it is cheap.

Quality ply is better. The good bamboo plywood is very good.

Now i know good ply is sometimes hard to find in Oz. 17mm hoop pine ply seems most common. Bamboo ply, at least variety, seems much more avaialble in Oz than here, but it is pricey (but that is offset by only the need for clearcoat for finish).

bambooPAWO-collage.jpg


dave
 
Those speakers are a work of art!

I wish I had known with mine, is there any way I can improve it? The 1 inch thick MDF I used was twice the price of the 18mm. I have a lot of epoxy resin it might soak in a little and increase the surface hardness.

I haven't done the back yet but have some good quality 18mm hardwood ply I could use for that. Would that help?
 
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It’s not the surface hardness of MDF that is its main sonic detriment, but rather its much lower stiffness per unit of weight compared to quality plywoods. Depending on the particular brand / grade, the face of some MDF panels are essentially tempered by the heat /pressure processor fabrication, and speaking from experience, I can attest are hard enough that with sharpest of woodworking tools can take a beveled edge keen enough to cut like a knife; then 1or 2 mm below that face can be soft enough to score with a thumbnail.

Those PAWOs seem like a lifetime ago.