Soliloquy 6.2 Very Poor Treble .....

Trelja, thanks so much for sharing your knowledge. I inspected the crossover for the tweeter with greater scrutiny. My memory is cruel to me indeed. In fact, there are six components on the tweeter board with a rather confounding wiring pattern.

There are three rectangular resistors. All have values printed on top. The large black and yellow Cap I previously mentioned, a much smaller black and yellow Cap(?) 1/4" in diameter and 1.5" long, and an air core inductor. The Caps and Inductor do not have values (Microfarad and miliohms, Right?) I cant seem to locate the Ohm symbol so I will write ohm in its stead.

A 10w6.2ohmJ resistor is feed Positive in (from amp) then to the large Cap then to the coil which then splits and goes to the Negative tweeter terminal and the Negative Amplifier in. This seems odd to me. But I digress, my knowledge in this area is extremely limited.

The large Cap has two other leads. One leads to another resistor (10w15ohmJ) which then goes to the Positive tweeter terminal..

The other feeds the smaller Cap then another resistor (10w4ohmJ) and the positive tweeter terminal as well.

So which resistor should I jump? ....or should I just go watch some preseason Football and shut my pie hole?

Autospec, thanks so much letting me use your thread =)

Thank you for your kind words, Distortion.

First try jumping both the smaller cap and the 4 ohm resistor also in series with the tweeter. This is a Zobel network, meant to flatten the impedance rise of the tweeter's voice coil as the frequency increases. Listen a while, then see what you think. I am not the biggest Zobel fan in the world, but if I did use one, it would be on the woofer, not tweeter.

Remove the jumper.

Next jump the 15 ohm resistor in series with the tweeter. This should definitely bring things forward, though it may not be good sound. Just spend a little time listening.

Finally, again jump the Zobel, while also still bypassing the 15 ohm tweeter. See what you think of this.

If things are progressing in the direction you feel is positive, you are on the right track. If things are too upfront, and I expect them to be, try the simple route of 6 and 10 ohm resistor in series with the tweeter only. You don't need to solder it in, just use another jumper.

Does it sound better than where you started? That is the ultimate question. If not, remove the jumpers and leave things alone. Otherwise, wire in the revised, simpler circuit.

Trelja, what a fun experiment. I jumped the 15ohm and just as you surmised, that was too much. I tried jumping the 6.2ohm and that was a bit too much as well. Jumping only the 4 ohm is noticeable but not too much. I have left the jumpers in place and sewn up the patient. I'll let it be for a few sessions.

The small Cap is combined with the 15 ohm Resistor at the Inductor. So any attempt to bypass it (Small Cap) mandates a bypass of the 15 ohm Resistor as well. Since they are combined at the coil and then rejoined at the positive tweeter terminal. Does this sound like a Zobel?

Trelja, thanks so much for all your help. This may have been the most productive and informative thread I have participated in to date! ...and fun too!

I have to agree, we are finaly getting somewhere.....Now we can get this system sounding pretty good..... Thanks Will

Yes, it sure is fun to play with this stuff! After a while, just from doodling, you get the feel of how changes effect the sound, and how this so - called black art, to be even viewed only by the chosen ones, is really something we should be dabbling in.

Maybe I am getting confused via my own stupidity, but it looked to me that the Zobel was the small capacitor with the 4 ohm resistor. If I was able to see it, it would make more sense for me.

Again, I wouldn't run a Zobel on the tweeter, but that's just me (the shamans can now appear to burn me at the stake). It sounds like you are jumping the 4 ohm resistor and seem happy? If the way I am seeing the crossover is correct, and the small cap is in series with this resistor, try jumping the capacitor as well to bypass the Zobel entirely. This may be all that is needed.

Please let us know what you think after a few days. Is this the added sparkle you were looking for, without irritation? If not, we can throw a quick design together that would lower the parts quantity while raising the parts quality. As you said, FUN!