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My Current Project...(Teasers...)

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  • mattp
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  • mattp
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    More progress. I got the stands finished up and I have to say I am very happy how they turned out. Assembly was a little tricky and filling them with sand was tedious but it worked out well in the end. And they are heavy. I haven't had a chance to weigh anything yet since I don't own a scale but I hope to at some point.

    Ignore the mess in my listening room. That is all going to be changing soon too.

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  • andykriech
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    Hi Matt, that makes sense. Can't wait to see them finished up.
    Andy.

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  • mattp
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    Originally posted by andykriech View Post
    Matt, no bevels across your top/base plates to mimic your bevels on the speakers?
    they seem a little plain/blunt in comparison to my eye...
    just my $.02
    Andy
    Andy,

    The angled corners will match the facets on the front but be straight down as opposed to angled inward. After playing with sketchup drawings and looking at both the straight angles looked a little better to me.

    I feel like this will have a little better separation from the cabinets instead of looking like an extension of the cabinet making it look a little long and asymmetrical vertically. It should make more sense once you see them finished.

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  • andykriech
    replied
    Matt, no bevels across your top/base plates to mimic your bevels on the speakers?
    they seem a little plain/blunt in comparison to my eye...
    just my $.02
    Andy

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  • mattp
    replied
    These will be assembled with 1/4-20 all thread through each pipe so the 3/4" countersunk holes are for the lock nuts and washers.

    It rained all day today so I am waiting for a dry day to sand and finish the bases and paint.

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  • mattp
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    Lots of tweaking to get the height right. These ended up being right at 23" high, plus an inch or so for the spikes. This should put the tweeters right at ear level in my LP.

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  • mattp
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    Quick project update guys. I'm still voicing and still tweaking. I haven't had much listening time the last couple days but I should more this week. I appreciate all the help thus far.

    I did manage to get a little more done on the stands. They are a bit generic but they should be solid and fit the aesthetic pretty well. As I said before the PVC will be painted an off-white and will be filled with sand. My estimate is roughly 30-35 lbs of sand per stand not including the weight of the other materials. I have yet to put the veneer on the edges but that will be the last step before poly and paint, then assembly. THEN SUBS...

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  • rpb
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ID:	1420080 This is pretty much the same, but with a couple different parts.

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  • rpb
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    Originally posted by Wolf View Post
    I count 12 due to a coil DCR being above 1 ohm. What I don't like is the 8dB droop in the top-end.

    Later,
    Wolf
    It's 11. Two fourth order filters is 8 parts. One padding resistor on the tweeter, one cap for the tank, and one resistor that I added in the woofer circuit. I didn't worry about the tweeter top end on this sim.

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  • Wolf
    replied
    I count 12 due to a coil DCR being above 1 ohm. What I don't like is the 8dB droop in the top-end.

    Later,
    Wolf

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  • rpb
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    OK.. here's my best effort at performance with reasonable part count. Higher xo point. Slightly more forward voicing. Breakup is buried. Should sound good when the need to crank things up hits you. Oh, and just 11 parts!

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  • rpb
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    Click image for larger version  Name:	voicing diff.jpg Views:	1 Size:	475.9 KB ID:	1419939 This 6 part filter would be just a smidgen more laid back. Here's a comparison. Black line is my filter. Gray is jhollander filter. I'm not suggesting it's better. Just has a couple less parts. Although not intentional, it's virtually the same filter.

    I'm working on another filter.
    Last edited by rpb; 08-21-2019, 07:55 AM.

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  • mattp
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    Originally posted by rpb View Post

    Here's a simple 6 part x-over that is voiced similar to what you are currently using.

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    While I do lean toward simplistic crossovers I'm not against more components if it means getting better from these drivers. It's not every day you have this caliber of drivers to work with so I am all about getting the best I can. I know the woofer is a little tricky to work with and the facets added some dips in the tweeter response.

    So many possibilities and so few crossover components to mock up.

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  • rpb
    replied
    Originally posted by mattp View Post

    rpb,

    There is a pretty significant difference there for sure. I like the added efficiency you show. I haven't used PCD in years, can you draw up a schematic and post? I may give something like this a try before I commit to anything. Weighing all options is never a bad thing.
    Here's a simple 6 part x-over that is voiced similar to what you are currently using.

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