Flex Your PCD Mettle:

[Zvuchniak]

Re: Flex Your PCD Mettle:

I will make some pictures of baffle and upload them in few minutes...

EDIT: Here it is



http://img222.imageshack.us/img222/4543/img0103qy.jpg

[Pete Schumacher]

Re: Flex Your PCD Mettle:

FRD and ZMA are from here...

For JBL+D220Ti from post's number 1 and 5

http://techtalk.parts-express.com/sh...95&postcount=1

http://techtalk.parts-express.com/sh...46&postcount=5

For Eminence Deltalite II 2512 from post number 136

http://techtalk.parts-express.com/sh...&postcount=136

OK, I ran a sim with no acoustic offset, with the mic position midway between woofer and tweeter, and a baseline sensitivity of 92dB.

Woofer XO:
2mH, 15uF

Tweeter XO: (pos polarity)
4.7uF, .2mH (.2Ohm 20ga)

L-pad:
3.3 series, 6.8 shunt.

Waveguide EQ:
series connected .05mH, 10uF, 2 Ohm. Placed in parallel with the 6.8 Ohm resistor and tweeter terminals.

[Zvuchniak]

Re: Flex Your PCD Mettle:

FRD and ZMA are from here...

For JBL+D220Ti from post's number 1 and 5

http://techtalk.parts-express.com/sh...95&postcount=1

http://techtalk.parts-express.com/sh...46&postcount=5

For Eminence Deltalite II 2512 from post number 136

http://techtalk.parts-express.com/sh...&postcount=136

[Pete Schumacher]

Re: Flex Your PCD Mettle:

This is what i get with crossover from post number 1192 if i move acoustic center of the Deltalite 2512 1"/25mm closer to the listener...



http://img406.imageshack.us/img406/9654/12dbo.png

And reversed polarity...



http://img89.imageshack.us/img89/2565/12dboreversed.png

Care to share the FRD and ZMA files you're using?

[Stu]

Re: Flex Your PCD Mettle:

Nice to see you guys are keeping this fantastic thread alive. What a great testament to the wonderful Man that Zilch was and still is. It will be nice to see this still moving forward in years to come

[Zvuchniak]

Re: Flex Your PCD Mettle:

This is what i get with crossover from post number 1192 if i move acoustic center of the Deltalite 2512 1"/25mm closer to the listener...



http://img406.imageshack.us/img406/9654/12dbo.png

And reversed polarity...



http://img89.imageshack.us/img89/2565/12dboreversed.png

[Zvuchniak]

Re: Flex Your PCD Mettle:

Here it is with xover for DL2512 you've posted early on http://techtalk.parts-express.com/sh...&postcount=145 (Woofer XO: 3mH, 15uF + 2 Ohm, 1mH). I've kept the 6.8uF+7.8ohm zobel on it.



http://img688.imageshack.us/img688/1363/s18dboxover.png

With reversed polarity...



http://img576.imageshack.us/img576/7...edpolarity.png

I'll try to adress that little peak at 7KHz

[Zvuchniak]

Re: Flex Your PCD Mettle:

I'd relax the woofer transfer function just a bit in the XO region, try to fill in the dip a little more.

I also notice that you aren't including any acoustic offset for the tweeter and woofer.

So you have the minimum phase included with the plots?

There aren't any acoustic offset in my opinion (in mine configuration). I will post pictures with woofer and tweeter on the 1.1" board for you to evaluate, but i think that they are dead on. I was trying to allign the voice coils of both units. I used this cross section of Eminence 12" to se where it is...



http://img407.imageshack.us/img407/3687/eminence.jpg

I have problem with filling that dip. When i let DL2512 do the frequencies that it should i get a nasty peak at 2KHz.

Woofer response was satisfying when i did the 18dB/o xover but than sensitivity is way down for speaker 95dB in bass region and i've been trying to avoid that.

I'm gonna try today to see what can i do about it.

Thanks for your advices Pete...

[Pete Schumacher]

Re: Flex Your PCD Mettle:

I'd relax the woofer transfer function just a bit in the XO region, try to fill in the dip a little more.

I also notice that you aren't including any acoustic offset for the tweeter and woofer.

So you have the minimum phase included with the plots?

[Zvuchniak]

Re: Flex Your PCD Mettle:

Hi guys. This is my first post here.

First i want to thank everyone who contributed to this ammount of DIY projects become available for us mortals. Especially kudos to Zilch.

For some time i've been trying to make my Eminence Deltalite II 2512 and JBL WG+D220Ti work. I've been playing with PCD for past few weeks.

Slowly finishing it up so i made some xover simulations in PCD. I would really appreciate some advices from PCD gurus. If this is not good, please let me know. I am still learning how to use PCD.



Here are woofer and tweeter xovers in particular...

http://img189.imageshack.us/img189/1...i2512xover.png

http://img145.imageshack.us/img145/4...ijblwgxove.png

The DL2512 will be mounted on the rear of the baffle (1.1"/28mm thick). Here are some pictures of it...

http://img196.imageshack.us/img196/927/img0469qt.jpg

http://img153.imageshack.us/img153/504/img0474mw.jpg

Regards, Z ...

[Starkiller4299]

Re: Flex Your PCD Mettle:

Say, you guys see any issues with using a 'standard' REW setup for taking driver measurements?

Specifically, I'm thinking the calibrated EMM-6 and a M Audio Mobile Pro. I don't think I'll be rushing to buy, but good to know exactly what I should get before I need it ;).

[Erich H]

Re: Flex Your PCD Mettle:

new SEOS waveguide being worked on at AVS
http://www.avsforum.com/avs-vb/showt...5#post20021245

Should be for sale in the future

Once the current Autotech group buy is done, they're going to let me set up another one. The current one is pretty much filled at this point. So it won't be long.

With the next one, the SEOS-15 and SEOS-10 prototype will be in full gear.

Those models are under "ellipticals" here:

http://www.diysoundgroup.com/WaveGuides.htm

[stgdz]

Re: Flex Your PCD Mettle:

new SEOS waveguide being worked on at AVS
http://www.avsforum.com/avs-vb/showt...5#post20021245

Should be for sale in the future

[srbliss]

Re: EconoWave HPB+ Data: Thanks

I believe that would be the post # 707. Nothing econo about it but you already know that. :D

Thanks, don't know how I missed that. Getting ready to build my 'Tribute to Zilch build' and I think these (with the 2452H-SL's that I already have) are going to be the ones.
Steve

[Das]

Re: Flex Your PCD Mettle: