Wayne Parham Messages: 19045 Registered: January 2001
Illuminati (33rd Degree)
It's easy to overlook polarity, especially on that model. The 2226H is positive black, as is the DE250. But not the Omega 15A or the PSD2002. It's almost like a trick or a practical joke.
I like to lay the cabinets on their backs to remove all the screws. Then use a plastic trim tool - like is commonly used by mechanics when removing dash or door trim - to pry up one side of the driver. That protects the wood. Sometimes you can use a bit of cloth underneath the tool to further protect the wood.
If you feel brave, leave the cabinet standing but tilted back 20 to 30 degrees. Remove all the screws but one in the bottom. Push the edge of the driver - holding it in position - while removing that last screw. Then slowly reduce pressure holding the driver in, allowing it to slide out.
Okay...Is it possible that the red on the DE250's is actually positive? I played with the polarities a bit and with the woofers black to + and tweeters red to +, the speakers sprang to life! I am in the room with Arne Domnerus right now!!
Wayne Parham Messages: 19045 Registered: January 2001
Illuminati (33rd Degree)
I doubt it very seriously but you can easily verify with acoustic measurements. If the compression driver is wired backwards, there will be a big dip in the crossover region when measured on-axis. The vertical nulls won't be at +/-20 degrees either.
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