Introducing: The Pit Vipers (Ooh Yeah!!!)

[Serenitynow]

I would make 3 separate crossover boards given the room available, one for each driver. Leads to less confusion if you're new to crossovers. No condescension, I would do 3 boards myself. More coil separation possible.

I actually had considered that.
I guess I could mount the woofer board on the bottom of the enclosure and the mid and tweeter boards on the window pane braces closest to those drivers.
Does that sound logical ?

[djg]

I would make 3 separate crossover boards given the room available, one for each driver. Leads to less confusion if you're new to crossovers. No condescension, I would do 3 boards myself. More coil separation possible.

[Serenitynow]

Paul Carmody

Hi again. Well, I've gotten in everything except the L4 inductor and a couple other odds and ends for these.

Would it be possible for you to post a picture of your crossover board layout. I'm wanting to organize this correctly.
Thanks again for everything you do for us !

[Paul Carmody]

Any one of those 3 is totally fine.

As I said earlier, I'm gonna go ahead and say it's OK to use an air core 5 mH coil, even if its DCR is slightly above 1. It'll work out, and you'll like it :-)

[Paul K.]

FWIW, I wouldn't hesitate to use No. 1. There's nothing wrong IMO with using a steel laminate inductor regarding sound quality, especially in a woofer crossover, and it's sure less expensive. In my Post #101 in this thread, the response for the modeling I did of the Pit Vipers had 0.5 ohms added in series with the woofer to represent the resistance of a series crossover inductor, which is almost identical to the d.c. resistance for your No. 1 inductor candidate. Nevertheless, the Pit Vipers is Paul C's design, not mine.
Paul

[9sheng]

I saw the discussion about the L4 coil. I'm still a little confused. I hope to get more answers here. I found 3 options from suppliers and they all have different prices.



I know number 3 is definitely ok. But what's the downside of using No. 2? Can No. 2 meet the design requirements? Because I want to achieve the best results while keeping costs in check. As you all see, I still have a lot to buy.
I've also seen iron core inductors like size 1 used on some projects by others, as Paul.C said, you can choose any type of inductor! The question is, is number 1 ok? If it is used, what is the disadvantage compared to the No. 2 hollow coil?
Although the copper wire of No. 1 in the picture is only 1.2mm, I can also find 1.6mm 5mH iron core inductors, and their internal resistance should also be less than 1Ω.

[fpitas]

Everyone knows, iron cores make your music sound ironic.

[Paul Carmody]

I'm very brand agnostic. Use whatever brand you can get. What matters most is the value, and that its tolerance is within +- 10% (5% is even better)

Also, that's really cool that you did your own PCB.

[Paul Carmody]

I look at it this way;

14AWG air-core = 18AWG steel laminate; usually these are pretty close. You could likely get by with a 16AWG air on the better side of results. I don't prefer to use smaller than 18AWG SL or 16AWG air on woofers if at all possible to keep the DCR low. Outside of that, Paul's recommendation is sound.

Thanks, Wolf.

After thinking about this, I think the 16 AWG air cores will be fine. Those are available various places. The DCR is slightly above 1 Ohm, but in the grand scheme of things, I think it'll work out just fine. In reality, if these were boutique speakers, they'd probably ship them with 16 AWG air cores and gush about how this offers "superior sound quality over shameful iron-core."

[9sheng]

The crossover accessories I used in the last pair of speakers "Classix II", the capacitors used are "BENNIC", I don't know if this brand of capacitors meet the requirements. The PCB circuit board is made by myself (actually I copied someone else's circuit diagram). From this, I learned the PCB design process, and I think I will take another big step forward when I design the PCB next time.

[9sheng]

Serenitynow Are you guys sharing more photos and photos of the crossovers and the originals as you make them? I am also planning to build this great speaker. But I can't start right away, I will have some job changes in the near future, so I will wait 2-3 months before I can start it. So here I am, hoping to see more details on the build process, and learn more.

@Paul Carmody can you share more detailed photos of your crossovers and builds?

[djg]

Available. 5.0MH, 14AWG, .59 ohms DCR, $64.

[rpb]

This is available.
Jantzen Audio 4.7mH 15 AWG P-Core Inductor Crossover Coil

[djg]

Or are you?

[djg]

It's not like you're going to build a pair with substitute coils and then build another pair with the "correct" coils and do a double blind listening test.