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Old 05-05-07, 01:47 AM   #12 (Link)
aceinc
Senior Shackster
Alias: Paul
Loc: SW Ranches, Fl
User: #3355
Since: Oct 2006
Posts: 186
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Re: Xover design...


I purchased a prebuilt xover for $5 on e-bay. It is a 3 way first order design with crossovers at 600 and 4500 hz. It was late last night after overcoming my last bit of silliness in cabinet construction, I had cut the holes too small for the mid's, the drivers would fit but when the wires were added, I found I had made the holes too small, I decided to see what the speaker sounded like. For $5 you don't get any documentation, so I hooked everything up, turned it on, and it sounded like I was listening to a speaker on a cheap modem.

I was shocked, so I pulled the woofers off the xover, and hooked them straigh to the input, and viola I had bass. So I played with various configurations, and didn't really get any thing that justified my effort. I finally hooked a cap to the tweets, and it sounded ok. I went to bed.

All day at work I was trying to find local folks with capacitor and inductors, with no luck. I posted the previous message and went home. When I got home I decided to look at the xover one more time. I am embarassed as the dickens to admit it, but I had hooked the input to the tweeter connections, and the tweets to the input leads.

I hooked the xover up correctly, and it sounded a lot better so I got the old Onkyo center, and did an AB compare. There was a lot more bass, but the mid was muddy, and too quiet. the Onkyo, while not great sounded better. After fiddling about some more, removing the crossover, and putting a cap back in, and it still was the same. On a hunch I got out the ohm meter and tested the three sets of leads, the woofers and tweets showed ~6ohms, the mids however showed 12ohms. For once I got a break, the first mid I pulled had a lead disconnected. I fixed that, and hooked everything back up, and it sounds great.

I decided to watch a movie and put off testing for tomorrow. As it is, it blends in well to the rest of the system. I will hopefully have some test sweeps over the weekend.

As I promised here is a picture.

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