BillFitzmaurice.info

nouvo1 wrote:Drivers arrived today. I cut out panels 1,2, and 3 tonight. Cut out the holes in the baffles, and read through the plans multiple times trying to find answers to some questions that have popped up in my head. Gonna reread a few times before asking questions as the "It's in the plans" response scares me! Tomorrow it's time to start gluing. I've never used PL so this should be interesting!

nouvo1 wrote:Nitrile gloves... most excellent idea. Adding to my shopping list.

My questions thus far:

1. Is there any purpose in the driver spacer being that octagon shape? It would seem that it would serve the same purpose being an exact square. Not a big deal as it's easy to cut corners off.

I don't know for sure, but two things spring to mind:

Bill trys to keep the designs as light as possible. Every few ounces of ply not required saves weight. The octagone still supplies enough reinforcement to make the baffle rigid.

More important in my mind is chamber space. It needs to allow sufficient back pressure to be applied the the rear of the driver. Reducing chamber space ie by not making it an octagon, reduces rear cone pressure.

2. The plans state how to attach the driver to the spacer/baffle. When doing it this way I'm confused as to how you would change drivers if/when they need replacing. I know how to run speakers properly and have *knock on wood* never blown anything. But this is my first speaker build, and there's a first for everything. On other cabinet designs of Bill's, that I've prematurely bought plans for, I've noticed the use of hurricane nuts ... but not on this one specifically.

The access panel allows installation and removal of the driver if that's required.
Over the last 12 months or so there has been a move away from anything excpet recex screws for driver mounting, owing to the amount of trouble people have with T and hurricane nuts.

3. There's no specific place to install the speakon hardware. I'm a long way from this, but I have the majority of the week off work, so I just may get to that point. Is there a recommended location? So far I'm thinking of putting it either on top of the cabs or on the back side. I'm guessing this is a preference sort of thing, but any recommendation with logical reasoning behind it would be great.

Depends somewhat on usage. If you always will wall/corner load, you might place speakons on the sloped panel at the front. Speakons in this location require total leak sealing.
Many people put them down low, in behind the 45 degree angle panel that joins the bottom and the back. This means you only have to seal the wire going to that location, not the speakons as well.
Or you can parallel sets to both locations.

I hope I haven't been too specific about copyright designs etc. If I have please let me know.

Nope, you haven't at all. Panel dimensions and cut list layouts are a big no no

Grant Bunter wrote:Nope, you haven't at all. Panel dimensions and cut list layouts are a big no no