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Re: Definimax 4012HO - End of Life [message #91830 is a reply to message #91818]

Tue, 05 May 2020 22:58

Symphonimind
Messages: 33
Registered: May 2018
Location: Singapore

Baron

Hi mr. Wayne,

I also purchased MJK's MathCAD sheets. I will try to model the cab to find the way to optimize mid leakage.

In my customed cabinet for 3Pi, I totally forgot to implement the stuffing at the mid height of the cab.

After trying 12PLB100 on 3Pi, I cant wait to see a new Woofer option from B&C with 4Pi beside JBL. For B&C, I can quite easily find in my area at the moment. However, JBL driver and especially 2226H is really hard to source locally. And I am not fond of Omega drivers from Eminence. I think that driver line is not really good. For 15inch midbass, Kappalite 3015 is better as a lower priced option, IMO.

The Delta Pro 12A is also great mid priced option. But as our measurement, the crossover needs small modification to match SPL between Delta and CD. In the test box with Delta Pro 12A, I used PSd2013 which has similar sensitivity to BC DE250.

Yesterday, we tested Celestion CDX 1745. It is truely a poorman's DE250. The power compression from 90-98dB/1m is non-existence. THD is really low for 98dB SPL/1m. I did a quick test with LF shelf and 1.2K XO LR4, it came out really good.

The unit to unit variation is really low, at B&C level.
I share with you some of our data so you can consider it. Very Happy

CDX 1745 + H290c/QSC152

Frequency response with H290C and QSC152, unit to unit variation
/forum/index.php?t=getfile&id=2575&private=0

THD - I forgot that which SPL I measured in this graph, but I am sure that It is around 90-95dB / 1m.
/forum/index.php?t=getfile&id=2573&private=0

Power Compression test + Test crossover
/forum/index.php?t=getfile&id=2572&private=0

CDX 1745 THD with XO 1.2K LR4
/forum/index.php?t=getfile&id=2574&private=0

Attachment: CDX 1745 Power Compression.jpg
(Size: 178.06KB, Downloaded 691 times)
Attachment: CDX1745 THD.jpg
(Size: 169.40KB, Downloaded 799 times)
Attachment: CDX1745 THD+XO 1.2K LR4.jpg
(Size: 152.95KB, Downloaded 777 times)
Attachment: CDX1745.jpg
(Size: 176.53KB, Downloaded 797 times)

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[Message index]

		Definimax 4012HO - End of Life By: Mudshark on Mon, 10 June 2019 13:59
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Tue, 11 June 2019 09:05
		Re: Definimax 4012HO - End of Life By: Mudshark on Wed, 12 June 2019 11:41
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Wed, 12 June 2019 12:11
		Re: Definimax 4012HO - End of Life By: rkeman on Sat, 15 June 2019 20:24
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Sun, 16 June 2019 09:59
		Re: Definimax 4012HO - End of Life By: johnnycamp5 on Tue, 18 June 2019 14:40
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Tue, 18 June 2019 14:54
		Re: Definimax 4012HO - End of Life By: Mudshark on Thu, 20 June 2019 19:15
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Fri, 21 June 2019 16:19
		Re: Definimax 4012HO - End of Life By: Mudshark on Wed, 12 June 2019 13:34
		Re: Definimax 4012HO - End of Life By: Symphonimind on Tue, 25 June 2019 09:08
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Tue, 25 June 2019 09:36
		Re: Definimax 4012HO - End of Life By: Symphonimind on Tue, 25 June 2019 10:04
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Tue, 25 June 2019 14:01
		Re: Definimax 4012HO - End of Life By: Symphonimind on Tue, 25 June 2019 20:53
		Re: Definimax 4012HO - End of Life By: johnnycamp5 on Tue, 25 June 2019 18:58
		Re: Definimax 4012HO - End of Life By: Mudshark on Wed, 26 June 2019 03:18
		Re: Definimax 4012HO - End of Life By: Mudshark on Tue, 03 September 2019 12:07
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Tue, 03 September 2019 16:02
		Re: Definimax 4012HO - End of Life By: Symphonimind on Tue, 03 September 2019 23:11
		Re: Definimax 4012HO - End of Life By: Mudshark on Wed, 04 September 2019 15:43
		Re: Definimax 4012HO - End of Life By: Symphonimind on Wed, 04 September 2019 21:55
		Re: Definimax 4012HO - End of Life By: Mudshark on Thu, 05 September 2019 08:24
		Re: Definimax 4012HO - End of Life By: Symphonimind on Fri, 06 September 2019 22:16
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Sat, 07 September 2019 09:41
		Re: Definimax 4012HO - End of Life By: Mudshark on Sat, 07 September 2019 17:39
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Sat, 07 September 2019 17:48
		Re: Definimax 4012HO - End of Life By: Mabob on Thu, 05 September 2019 06:15
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Sat, 07 September 2019 17:15
		Re: Definimax 4012HO - End of Life By: Mudshark on Sat, 07 September 2019 17:59
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Sun, 08 September 2019 17:55
		Re: Definimax 4012HO - End of Life By: Mudshark on Mon, 09 September 2019 10:30
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 09 September 2019 11:20
		Re: Definimax 4012HO - End of Life By: Symphonimind on Fri, 27 September 2019 08:06
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Fri, 27 September 2019 09:22
		Re: Definimax 4012HO - End of Life By: Symphonimind on Fri, 27 September 2019 10:26
		Re: Definimax 4012HO - End of Life By: Mabob on Mon, 07 October 2019 08:01
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 07 October 2019 09:07
		Re: Definimax 4012HO - End of Life By: Symphonimind on Wed, 09 October 2019 06:20
		Re: Definimax 4012HO - End of Life By: Mabob on Fri, 11 October 2019 11:42
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Fri, 11 October 2019 13:16
		Re: Definimax 4012HO - End of Life By: paulp1960 on Sun, 13 October 2019 10:16
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 14 October 2019 11:08
		Re: Definimax 4012HO - End of Life By: paulp1960 on Tue, 15 October 2019 06:33
		Re: Definimax 4012HO - End of Life By: Symphonimind on Thu, 12 December 2019 04:35
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Thu, 12 December 2019 09:30
		Re: Definimax 4012HO - End of Life By: Symphonimind on Fri, 13 December 2019 00:39
		Re: Definimax 4012HO - End of Life By: Symphonimind on Fri, 20 December 2019 00:23
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Fri, 20 December 2019 09:09
		Re: Definimax 4012HO - End of Life By: Symphonimind on Fri, 20 December 2019 09:16
		Re: Definimax 4012HO - End of Life By: DaveFred on Fri, 01 May 2020 09:30
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Fri, 01 May 2020 11:10
		Re: Definimax 4012HO - End of Life By: Symphonimind on Sun, 03 May 2020 23:21
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 04 May 2020 12:47
		Re: Definimax 4012HO - End of Life By: Symphonimind on Tue, 05 May 2020 22:58
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Wed, 06 May 2020 09:52
		Re: Definimax 4012HO - End of Life By: johnnycamp5 on Wed, 06 May 2020 11:30
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Wed, 06 May 2020 11:39
		Re: Definimax 4012HO - End of Life By: Symphonimind on Thu, 07 May 2020 06:49
		Re: Definimax 4012HO - End of Life By: Symphonimind on Tue, 12 May 2020 21:36
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Wed, 13 May 2020 11:01
		Re: Definimax 4012HO - End of Life By: Symphonimind on Wed, 13 May 2020 23:33
		Re: Definimax 4012HO - End of Life By: DaveFred on Wed, 06 May 2020 13:44
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Wed, 06 May 2020 16:39
		Re: Definimax 4012HO - End of Life By: Scott L2 on Mon, 15 January 2024 06:48
		Re: Definimax 4012HO - End of Life By: johnnycamp5 on Mon, 15 January 2024 09:04
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 15 January 2024 10:37
		Re: Definimax 4012HO - End of Life By: Scott L2 on Mon, 15 January 2024 14:03
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 15 January 2024 15:34
		Re: Definimax 4012HO - End of Life By: rvsixer on Sat, 25 July 2020 11:14
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Sun, 26 July 2020 11:01
		Re: Definimax 4012HO - End of Life By: rvsixer on Sun, 26 July 2020 13:30
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Mon, 27 July 2020 10:24
		Re: Definimax 4012HO - End of Life By: rvsixer on Thu, 28 January 2021 14:26
		Re: Definimax 4012HO - End of Life By: Wayne Parham on Thu, 28 January 2021 15:17

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