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Re: 4 pi speakers + 3 pi subwoofers, pics & measurements [message #81376 is a reply to message #81374]

Thu, 04 June 2015 10:53

vandevoordekoen
Messages: 18
Registered: January 2013

Chancellor

Hello,

I can't say the speakers sound like there is no tweeter at all. Neither can I say that the HF are "sparkling", but maybe that's not necessary.

To test the measurement system, I measured the HF signal 3 times: with and without USB audio card + using 2 different mics (ECM8000 and TASCAM DR-1 (TASCAM is not great but no garbage either)). The following overlap gives an idea:

Red line = TASCAM mic directly connected with laptop (mic-in)
Green line = TASCAM mic connected to the USB audio card (M-audio Fast Track)
Blue line = EMC8000 mic connected to the USB audio card (M-audio Fast Track) WITHOUT .cal-file

Red and Green line are approximately the same. The Fast track isn't the weak link. Confused

The ECM8000 measurement without .cal file gives approximately the same result. So the .cal file is corrupted IMHO.

Just to give an idea, these are the same measurements, WITH .cal file applied for the ECM8000 mic

Looking at the first overlap, I see a 5db to 10db roll-off. But this might be normal? Aaaargh, it's driving me a little crazy, honestly. Shocked

Would it be the amp?

Attachment: vergelijking.jpg
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Attachment: vergelijking_met_cal.jpg
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[Message index]

		4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Tue, 26 May 2015 13:29
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Tue, 26 May 2015 13:39
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Wed, 27 May 2015 08:05
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Wed, 27 May 2015 11:04
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Wed, 27 May 2015 16:23
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Thu, 28 May 2015 11:19
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: chrisR on Thu, 28 May 2015 11:32
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Thu, 28 May 2015 12:59
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Thu, 28 May 2015 14:36
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Sat, 30 May 2015 11:28
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Sun, 31 May 2015 09:48
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: tom-m on Wed, 03 June 2015 18:12
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Thu, 04 June 2015 10:19
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Thu, 04 June 2015 10:53
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: Wayne Parham on Fri, 05 June 2015 17:37
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: vandevoordekoen on Tue, 26 May 2015 13:47
		Re: 4 pi speakers + 3 pi subwoofers, pics & measurements By: tom-m on Fri, 05 June 2015 22:09

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