"Aegis" 3.5 way 3rd Low Impedance Problem? *PIC*

[paul_n_oneal]

I have tried this latest crossover and by golly I'm getting close. The only thing that bothers me is that 1.7 dip at around 1800hz. It's only a few hundred hertz each side before reaching safety again in the 4ohm range. My amp doesn't seem to mind. Now maybe if a note that lasted a few seconds might make it go into protect mode, but I doubt that is going to happen. Do you guys think I should bother trying to fix it or not?

Cheers,

Paul

[bpodruzny]

> I have tried this latest crossover and by
> golly I'm getting close. The only thing that
> bothers me is that 1.7 dip at around 1800hz.
> It's only a few hundred hertz each side
> before reaching safety again in the 4ohm
> range. My amp doesn't seem to mind. Now
> maybe if a note that lasted a few seconds
> might make it go into protect mode, but I
> doubt that is going to happen. Do you guys
> think I should bother trying to fix it or
> not?

I am a relative “NUB” at building speakers, but, well, I’d put it like this…
Eventually an amp circuit will burn out, ohm load not withstanding. As an Occupational Therapist (yes that is a real job title…) I’d ask one question… does it function?? Do the speakers play your music, and does it sound better than it has before? If it does… then the 1.7-ohm load at 1800 hz is a mute (no pun intended) issue. Enjoy the music man! From your response curve you’ve created a great speaker. If your amp doesn’t mind the load then just enjoy!

PS, yes I do realize that a load that drops below 2 ohm is hard on even the best of amps, but good music comes had to come from somewhere right?

-A “NUB” Named Brian

> Cheers,

> Paul

[envisionelec]

> I am a relative “NUB” at building speakers,
> but, well, I’d put it like this…
> Eventually an amp circuit will burn out, ohm
> load not withstanding. As an Occupational
> Therapist (yes that is a real job title…)
> I’d ask one question… does it function?? Do
> the speakers play your music, and does it
> sound better than it has before? If it does…
> then the 1.7-ohm load at 1800 hz is a mute
> (no pun intended) issue. Enjoy the music
> man! From your response curve you’ve created
> a great speaker. If your amp doesn’t mind
> the load then just enjoy!

> PS, yes I do realize that a load that drops
> below 2 ohm is hard on even the best of
> amps, but good music comes had to come from
> somewhere right?

> -A “NUB” Named Brian

The pun is more funny when it makes sense. The word is moot, not mute.

[bpodruzny]

> The pun is more funny when it makes sense.
> The word is moot, not mute.

Heh, guess I had a bit of a slip there… Thanks Aaron; but the meaning is the same... If the load doesn’t seem to hurt the amp them just enjoy what you've created with the Aegis 3.5.
Congrats Paul.

[jonpike]

> The pun is more funny when it makes sense.
> The word is moot, not mute.

This for some reason bothers me way more than it really should...

Actually, he didn't use the exact phrase "moot point" and it would be less recognizable as a pun in the correct form.. but swapping these two is something so common nowadays I wonder where it's coming from?

If you think about it a "moot point" i.e. one that is besides the point, or now obsolete in view of current info.. makes more sense than a "mute point" one that, I don't know, sits there unable to argue for itself?

Interesting that it is so similar, but not correct. It almost makes it to being the phrase, but dosen't. Kind of a "I learned it but wasn't really paying attention, and what I remember is the way it is" thing. Assuming that college perfessors aren't just teaching it that way now..
I seem to see nearly everyone under 30 says mute,

BTW, I'm not picking you for using it. It's getting so prevelant that I'm fearing it to show up in textbooks as the original, and that funny "Moot" word is the incorrect one, any day now.

Ah well.. pet peeves... There went some speakerbuilding time I'll never get back... ;-)

[shawn_a]

I was reading the Indy Star yesterday and was yet again annoyed to no end by the use of the word "indexes." And all this time I was taught the proper word was indices. The English language is hatching these bastardizations at an alarming rate. And yes, I call several Elvis impersonators Elvii.

shawn

[johnastockman]

> I was reading the Indy Star yesterday and
> was yet again annoyed to no end by the use
> of the word "indexes." And all
> this time I was taught the proper word was
> indices. The English language is hatching
> these bastardizations at an alarming rate.
> And yes, I call several Elvis impersonators
> Elvii.

> shawn

I agree with ya...you folks, I mean. Many peeves have I. "Orientated" when it should be "oriented". A friend, who is a journalist, told me that "orientated" is actually in the dictionary now! More bastardizations! But I call Elvis impersonators something different...

John A.

[Andy_G]

> I agree with ya...you folks, I mean. Many
> peeves have I. "Orientated" when
> it should be "oriented". A friend,
> who is a journalist, told me that
> "orientated" is actually in the
> dictionary now! More bastardizations! But I
> call Elvis impersonators something
> different...

yep, it seems that the American laguage is finally diverging from English ;-)))

[Andy_G]

[cjd]

I think it's not a problem, BUT I also think you should look more closely at the crossover through that region.

When I was struggling with a similar problem I eventually built two versions - one with a lower impedance minimum (near 2ohm) and one where I gave up some phase integration and had a minimum near 3ohm. Know what? The latter sounded better.

My amplifier has no problem with the low impedance load specifically (i.e. it's not going into protect mode) BUT I think the higher impedance "angle" and the low point both stress it, resulting in more distortion.

There's a lot going on in the region you have low impedance. It's very amp un-friendly, as such things go. If this is one you're ultimately going to share, I think this is going to be more of an issue.

[paul_n_oneal]

> I think it's not a problem, BUT I also think
> you should look more closely at the
> crossover through that region.

> When I was struggling with a similar problem
> I eventually built two versions - one with a
> lower impedance minimum (near 2ohm) and one
> where I gave up some phase integration and
> had a minimum near 3ohm. Know what? The
> latter sounded better.

> My amplifier has no problem with the low
> impedance load specifically (i.e. it's not
> going into protect mode) BUT I think the
> higher impedance "angle" and the
> low point both stress it, resulting in more
> distortion.

> There's a lot going on in the region you
> have low impedance. It's very amp
> un-friendly, as such things go. If this is
> one you're ultimately going to share, I
> think this is going to be more of an issue.

Currently in the process of adding more BS and reconfiguring the crossover. Looks like about 3ohm in that range now. Much better but I haven't had a chance to listen to it yet. You never know until you try it so I'm off to do some work. Cheers, Paul