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Multi-Way Conventional loudspeakers with crossovers

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Old 1st November 2011, 11:24 AM   #111
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I too used cable ties for attaching my coils (and caps) to my crossover board. The vertically mounted coils I only used a single one. They are not that sturdy, but they aren't going to fall off either Cable ties are quite strong! you can see fairly well in this pic of the partially constructed crossover. The link I posted earlier has the fully completed board where you can see the cable ties on the caps as well.

Black cable ties are the ones holding to the board, white ones are the ones I used to hold the coils together after I wound them.

Tony.
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Old 1st November 2011, 11:41 AM   #112
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Tony, that looks nice, but I am too lazy right now and getting eager to hear them play, so I will just use a little glue so I can move the board and start playing. Easy to remove with a razor blade knife. I really like the looks of my white capacitors and I do not think that glue of mine will destroy them in any way, it is rather flexible.
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Old 1st November 2011, 01:31 PM   #113
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Is the blue capacitor 33uF indeed?
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Old 1st November 2011, 02:02 PM   #114
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Yes it is, it is a little simpler cap compaired to the rest, the white ones do not exist in that big capacitance value. But it is the same type of capacitor, not bipolar. http://www.europe-audio.com/Product.asp?Product_ID=8501
The white ones are bigger, for example the 10uF is bigger than the blue Jantzen 33uF as seen in my pictures.

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Old 1st November 2011, 07:59 PM   #115
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I am dubious about what is + and - on my tweeter, can someone help me?
I find this marking on the left terminal, see pic.
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Old 1st November 2011, 08:17 PM   #116
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Normally the wider lug is positive. If you will use a 1.5V battery cell on the driver and you will watch from the side, you will see the dome move slightly out when (+) is connected the right way.
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Old 1st November 2011, 08:29 PM   #117
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Ok, the terminals looks to be the same size to me, so I will try the battery test.
I have glued the crossover but it need to dry so the soldering will be done tomorrow . I also discovered I did not have a wire cutter (forgotten at work) to remove excessive wire so I will relax tonight and complete it tomorrow.
One question Salas, I have read somewhere that when haveing a second order butterworth filter (which your filter reminds me of) + and - should not be the same for woofer/tweeter. Did you try this?
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Old 1st November 2011, 08:59 PM   #118
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That's textbook analysis for electrical, no acoustic slope phase or Z plane emitting distances taken into account. If you will reverse polarity you will get some null in this one. If the terminals are same width then the mark (any color) should be (+) logically, but do the battery test for the sake of sanity.
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Old 1st November 2011, 09:18 PM   #119
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Ok, interesting to know. I will do the test to be sure what I have.
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Old 2nd November 2011, 05:20 PM   #120
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The filter is ready (se picture), next step after dinner is to solder some connection cables, put some stuffing in the cabinets just to start with and insert the reflex port. It is safe doing this right? I know it will not be 100% sealed everywhere since I got a removable baffle with wooden plugs, but I can´t damage anything right?
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