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Re: 4Pi with feet [message #78240 is a reply to message #78127] |
Wed, 30 October 2013 18:29 |
lucasmateo
Messages: 43 Registered: October 2013
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Baron |
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They are breaking in? Or something happened.
I changed the cables to a better one, I'm not really a cable fan, but maybe is this?
They sound great, amazing, better than anything I had before. They are truly record dependant, I hear from tom waits to kusturica, some jazz, some modern (james blake...) It depends on my humor.
Some records have great tight defined bass with great extension, some others lack it. I'll listen to them for some weeks, and then try less insulation. This way they sound great, better that I expected.
This photos are from now, its quite late so I have bad light, on the weekend I'll post some nice shots, I used to be a photographer...
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Re: 4Pi with feet [message #78251 is a reply to message #78127] |
Thu, 31 October 2013 18:01 |
Matts
Messages: 359 Registered: May 2009
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Grand Master |
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Sounds like your speakers are doing fine. A lot of records, especially rock, are engineered for the booming tight boxes, and sometimes people interpret that boominess as bass, when it's a distortion. Kind of a quality vs. quantity issue. Also, many rock records don't really have much happening below 60-70Hz, and bass sounds lacking when you listen on a system that goes an octave below that. The Pi4's don't go super deep, but I can rattle my windows with them, even with 2A3's, when I put on Tupac's greatest hits....
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Re: 4Pi with feet [message #78275 is a reply to message #78274] |
Mon, 04 November 2013 00:28 |
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Wayne Parham
Messages: 18783 Registered: January 2001
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Illuminati (33rd Degree) |
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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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