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Re: 4Pi with feet [message #78275 is a reply to message #78274]

Mon, 04 November 2013 00:28

Wayne Parham
Messages: 18686
Registered: January 2001

Illuminati (33rd Degree)

I'm not really sure what compression driver you listed in the notes on your crossover order, but I can check tomorrow. Then again, that doesn't matter really - Please double check the values installed on your boards. The R2 resistors (four closest to the edge of the board) should all be 16Ω values and the R1 resistors (next four in) should be 20Ω and 30Ω values. Please verify that.

If the R1/R2 values are right, then I know what your tweeter SPL is, and that leaves only the woofer. You can't tell the condition of the woofer by looking at it - Some third-party recones look very much like OEM parts, but they're not. Some are really bad, to be honest, with horrible breakup and other nasty things. Yours don't look that bad, but they do look like they are less sensitive than they should be, by about 6-8dB from your charts.

I'd like to see absolute SPL values, as measured on an LMS system at a known distance and drive voltage. I'm sort of assuming the compression driver is good, since it's a new part. Under that assumption, I can sort of use the tweeter as a baseline, since I know what it does. I suppose it is possible that the compression driver is abnormally "hot", but I find that extremely unlikely. And even if the R1/R2 values were set for the PSD2002 instead of the DE250, that would only explain 2dB shift, not the level we're seeing in your charts. So I am leaning towards woofers being out-of-spec at this point.

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[Message index]

		4Pi with feet By: lucasmateo on Thu, 17 October 2013 10:41
		Re: 4Pi with feet By: lucasmateo on Thu, 17 October 2013 11:03
		Re: 4Pi with feet By: tom-m on Thu, 17 October 2013 15:27
		Re: 4Pi with feet By: lucasmateo on Thu, 17 October 2013 16:25
		Re: 4Pi with feet By: Wayne Parham on Thu, 17 October 2013 16:53
		Re: 4Pi with feet By: lucasmateo on Thu, 17 October 2013 17:16
		Re: 4Pi with feet By: Bill Epstein on Thu, 17 October 2013 20:46
		Re: 4Pi with feet By: lucasmateo on Thu, 17 October 2013 21:46
		Re: 4Pi with feet By: lucasmateo on Fri, 18 October 2013 10:41
		Re: 4Pi with feet By: my0x on Sun, 20 October 2013 20:18
		Re: 4Pi with feet By: shallow pockets on Mon, 21 October 2013 01:04
		Re: 4Pi with feet By: lucasmateo on Sat, 26 October 2013 13:25
		Re: 4Pi with feet By: Wayne Parham on Sat, 26 October 2013 17:30
		Re: 4Pi with feet By: Nick77 on Sun, 27 October 2013 04:10
		Re: 4Pi with feet By: lucasmateo on Sun, 27 October 2013 09:44
		Re: 4Pi with feet By: lucasmateo on Mon, 28 October 2013 07:28
		Re: 4Pi with feet By: Wayne Parham on Mon, 28 October 2013 08:13
		Re: 4Pi with feet By: lucasmateo on Mon, 28 October 2013 14:53
		Re: 4Pi with feet By: Wayne Parham on Mon, 28 October 2013 18:30
		Re: 4Pi with feet By: lucasmateo on Mon, 28 October 2013 19:10
		Re: 4Pi with feet By: Wayne Parham on Mon, 28 October 2013 19:18
		Re: 4Pi with feet By: Bill Epstein on Mon, 28 October 2013 19:28
		Re: 4Pi with feet By: lucasmateo on Mon, 28 October 2013 20:07
		Re: 4Pi with feet By: lucasmateo on Tue, 29 October 2013 18:24
		Re: 4Pi with feet By: Wayne Parham on Wed, 30 October 2013 01:21
		Re: 4Pi with feet By: lucasmateo on Wed, 30 October 2013 08:12
		Re: 4Pi with feet By: lucasmateo on Wed, 30 October 2013 11:06
		Re: 4Pi with feet By: Wayne Parham on Wed, 30 October 2013 12:03
		Re: 4Pi with feet By: Matts on Wed, 30 October 2013 14:06
		Re: 4Pi with feet By: lucasmateo on Wed, 30 October 2013 15:12
		Re: 4Pi with feet By: Matts on Wed, 30 October 2013 17:45
		Re: 4Pi with feet By: lucasmateo on Wed, 30 October 2013 18:29
		Re: 4Pi with feet By: Matts on Thu, 31 October 2013 18:01
		Re: 4Pi with feet By: lucasmateo on Thu, 31 October 2013 19:27
		Re: 4Pi with feet By: my0x on Sat, 02 November 2013 22:15
		Re: 4Pi with feet By: lucasmateo on Sat, 02 November 2013 23:27
		Re: 4Pi with feet By: lucasmateo on Sun, 03 November 2013 16:52
		Re: 4Pi with feet By: Wayne Parham on Sun, 03 November 2013 22:52
		Re: 4Pi with feet By: lucasmateo on Sun, 03 November 2013 23:07
		Re: 4Pi with feet By: Wayne Parham on Mon, 04 November 2013 00:28
		Re: 4Pi with feet By: lucasmateo on Mon, 04 November 2013 08:29
		Re: 4Pi with feet By: Wayne Parham on Mon, 04 November 2013 10:16
		Re: 4Pi with feet By: lucasmateo on Mon, 04 November 2013 14:48
		Re: 4Pi with feet By: Wayne Parham on Mon, 04 November 2013 15:10
		Re: 4Pi with feet By: HPower on Tue, 05 November 2013 08:59
		Re: 4Pi with feet By: lucasmateo on Tue, 05 November 2013 10:24
		Re: 4Pi with feet By: Matts on Tue, 05 November 2013 11:24
		Re: 4Pi with feet By: dheflin44 on Tue, 05 November 2013 12:01
		Re: 4Pi with feet By: lucasmateo on Tue, 05 November 2013 14:14
		Re: 4Pi with feet By: lucasmateo on Fri, 08 November 2013 12:03
		Re: 4Pi with feet By: Wayne Parham on Fri, 08 November 2013 12:38
		Re: 4Pi with feet By: lucasmateo on Fri, 08 November 2013 15:06
		Re: 4Pi with feet By: Wayne Parham on Fri, 08 November 2013 15:17
		Re: 4Pi with feet By: lucasmateo on Fri, 08 November 2013 15:27
		Re: 4Pi with feet By: Wayne Parham on Fri, 08 November 2013 18:38
		Re: 4Pi with feet By: lucasmateo on Sun, 10 November 2013 08:46
		Re: 4Pi with feet By: lucasmateo on Sun, 10 November 2013 11:46
		Re: 4Pi with feet By: Wayne Parham on Sun, 10 November 2013 15:06
		Re: 4Pi with feet By: Duncan McBride on Sat, 16 November 2013 21:34
		Re: 4Pi with feet By: lucasmateo on Sun, 17 November 2013 18:17
		Re: 4Pi with feet By: tubemax on Mon, 25 November 2013 15:16
		Re: 4Pi with feet By: Wayne Parham on Mon, 25 November 2013 17:12
		Re: 4Pi with feet By: tubemax on Tue, 26 November 2013 15:13
		Re: 4Pi with feet By: lucasmateo on Wed, 27 November 2013 07:16
		Re: 4Pi with feet By: Wayne Parham on Wed, 27 November 2013 08:53
		Re: 4Pi with feet By: lucasmateo on Thu, 28 November 2013 21:34
		Re: 4Pi with feet By: Wayne Parham on Fri, 29 November 2013 08:48
		Re: 4Pi with feet By: dmeckstr on Sun, 01 December 2013 01:45
		Re: 4Pi with feet By: lucasmateo on Sun, 01 December 2013 08:16
		Re: 4Pi with feet By: NWCgrad on Wed, 04 December 2013 19:29
		Re: 4Pi with feet By: lucasmateo on Mon, 09 December 2013 16:52
		Re: 4Pi with feet By: Wayne Parham on Tue, 10 December 2013 10:37
		Re: 4Pi with feet By: lucasmateo on Tue, 10 December 2013 13:01
		Re: 4Pi with feet By: Matts on Tue, 17 December 2013 14:13
		Re: 4Pi with feet By: lucasmateo on Tue, 17 December 2013 14:43
		Re: 4Pi with feet By: Matts on Thu, 26 December 2013 16:24
		Re: 4Pi with feet By: lucasmateo on Sun, 30 March 2014 19:03
		Re: 4Pi with feet By: Wayne Parham on Tue, 01 April 2014 10:32
		Re: 4Pi with feet By: Matts on Fri, 04 April 2014 14:30

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