Anarchy + SB25 PCD project, input please

[Tony Nelson]

Here is my project. Probably messed something up. I would like input on this. Box is 15L tuned to 40hz. Baffle size is 9"x14"

Let me know how it looks, and what I should change. Tried to use component values that I can buy.

I'm not quit sure about the phase part of it, so that may be all wrong.

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

Here are the woofer and tweeter parts. Not quit sure about the offsets also, whether I input them right.

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

If there is any other pics I need to put up. Let me know

[mzisserson]

Re: Anarchy + SB25 PCD project, input please

Need summed and driver responces at a decent resoultion. Also Phase. Electrical Phase too. There is not enough infor there. What are your offsets?

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

Is this better?

[tom_s]

Re: Anarchy + SB25 PCD project, input please

Is the DCR on your big inductor 1.3 ohms?? Ahhh, found it. 20G air core. You might want to try a solid core, like an I-core or P-core. The I-core is about the same price and the Ps are only a few $$ more. Both have much less resistance.

BTW-I should have bought a pair of those Anarchy drivers when they were on sale!!:(

[DoubleTap]

Re: Anarchy + SB25 PCD project, input please

Kevin Haskins suggested a notch be used on the Anarchy ... I think he posted it on htguide.com, but I'm sure he'll check in here as well. The FR of it with the notch was very suitable to a 1st order electrical.

Dink around with trying to get your phase more in-line at and above the x-over point.

[mzisserson]

Re: Anarchy + SB25 PCD project, input please

Tony,
Please post the elcectrical phase.

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

where is the electrical phase option? And Ya I figured my phase wasn't quite right. I will dink around still, and change that inductor. Keep the ideas comin.

[DoubleTap]

Re: Anarchy + SB25 PCD project, input please

It might have been on audiocircle.com that Kevin posted measurements after just a notch ... he posted the notch used as well. It's worth plugging that in before going any farther, and see what you get.

[Wolf]

Re: Anarchy + SB25 PCD project, input please

System-impedance graph, the 'blue line'.

I would personally try tank-capping the woofer. Use your 3.0mH/0.22uF or so/99999 ohms in the 'before xover' location, and set the L1 to 0.00 with your coil DCR still listed. This will notch the breakup further, with minimal added cost. The breakup at 3.8 kHz is why there is a dip in the tweeter's range. I would also try adding a resistor in series with the 7.5uF cap of about 1-2 ohms to adjust the knee at rolloff.

On the tweeter, the transfer function is smooth. I think however that the bump (~1.8kHz) before rolloff could be adjust a bit. That might sound a bit nasal. In my usage of that tweeter I had a 20uF/0.2mH/15uF, and while you are crossing lower, maybe a 'flip' would benefit there.

Hope this helps,
Wolf

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

Tony,
Please post the elcectrical phase.

Is this what you are looking for?

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

Thanks for the hints guys. I will work on it. Wolf...I will try what you said, hopefully I dont screw that up. :rolleyes:

[Wolf]

Re: Anarchy + SB25 PCD project, input please

Yes- and it looks like a gem of an elec-phase plot too! Between +/-40 deg is recommended, and you've exceeded that, so congrats!
Later,
Wolf

[Tony Nelson]

Re: Anarchy + SB25 PCD project, input please

System-impedance graph, the 'blue line'.

I would personally try tank-capping the woofer. Use your 3.0mH/0.22uF or so/99999 ohms in the 'before xover' location, and set the L1 to 0.00 with your coil DCR still listed. This will notch the breakup further, with minimal added cost. The breakup at 3.8 kHz is why there is a dip in the tweeter's range. I would also try adding a resistor in series with the 7.5uF cap of about 1-2 ohms to adjust the knee at rolloff.

On the tweeter, the transfer function is smooth. I think however that the bump (~1.8kHz) before rolloff could be adjust a bit. That might sound a bit nasal. In my usage of that tweeter I had a 20uF/0.2mH/15uF, and while you are crossing lower, maybe a 'flip' would benefit there.
Hope this helps,
Wolf

Thanks to the tip. What do you mean by a 'flip' would benefit there? Do you mean flip the values that I have, so swap capacitor values? or use yours?

And did you also mean to put in an RLC circuit? So 3mh and 0.22uF, and then R=999999?