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Multi-Way Conventional loudspeakers with crossovers

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Old 24th August 2008, 06:48 PM   #11
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Join Date: Jun 2007
Just a thought, but is there a chance you have mixed up the 8 ohm R1 and the 3 ohm R2?

Do the tweeters sound generally loud relative to the woofer?

From a quick look, it seems the G2si is 6 ohms; 6 ohms in parallel with 3 ohms (R2) is 2 ohms. So, the overall impedance of the L-Pad Circuit plus the tweeter is 10 ohms. Simply math tell us that 80% of the signal is lost across the 8 ohm R1 leaving 20% of the signal across the tweeter.

If the resistors were reversed, the tweeters would generally sound louder than they should.

So, again, the 8 ohm should be in series with the tweeter and the 3 ohm should be in parallel.

It's probably not a problem; it was just a thought. I made the same mistake recently in rewiring my speakers.

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Old 24th August 2008, 08:30 PM   #12
tinitus is offline tinitus  Europe
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My thought too...something fishy going on with those resistors
but then, I suppose those tweeters are ribbons, and they may need lots of attenuation
Also, IF those resistors are right, the change they make are/should be incorporated in xo
Its not easy, but I have learned that a lot may be gained from playing a bit with those resistors
sometimes we know very little, and sometimes we know too much
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Old 24th August 2008, 09:21 PM   #13
Did it Himself
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Have you actually listened to the summed output to make sure it sounds in balance? Just listening to one driver can be very misleading.
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Old 26th August 2008, 02:01 PM   #14
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Location: Brooklyn, NY

Thanks for all your replies.

Yes I have listened to the summed up ouput and also made sure that no resistors were mixed.

I think everything is all right and that all the problem was in my mind.

What happened is that I had been listening to the Jordan drivers as full range. Since the top end of these drivers is very linear and the speakers were placed too low, I got used to hear lots of mid and low frecuencies. Then at the sam time I added the ribbons and crossovers I placed the speakers in proper stands, which meant that the sound coming out from the system was just totally different and I felt that something was wrong. This is what made me listen to the tweeters and woofer separatelly as, as I said, I did not want to blow up my tweeters.

Anyway, now I have got used to the "new" sound of my speakers and I really like it and also I have played very loud music and the tweeters did not blow up. So, yes it was all my imagination.

Thanks again

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