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Re: 4 Pi Build Progress [message #81482 is a reply to message #81481]

Thu, 23 July 2015 15:39

Wayne Parham
Messages: 18787
Registered: January 2001

Illuminati (33rd Degree)

Rounding the corners is always OK.

All LAB12 and Pi-12 woofers are advertised as 6Ω devices. When horn loaded, some people say they're 8Ω each. But either way, a single-figure impedance value isn't accurate, and is just an approximation, if even that.

The impedance in free air is between 4-6Ω from 60Hz to 200Hz or so. Below that range and it rises dramatically because of resonance, up to around 100Ω, but then falls again below resonance. At the lowest frequencies it approaches its DC resistance of 4.3Ω Above 200Hz impedance steadily rises, doubling approximately every 1.5 octaves or so.

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[Message index]

		4 Pi Build Progress By: BobTahoe on Sat, 18 July 2015 23:04
		Re: 4 Pi Build Progress By: Wayne Parham on Sun, 19 July 2015 12:13
		Re: 4 Pi Build Progress By: BobTahoe on Mon, 20 July 2015 12:10
		Re: 4 Pi Build Progress By: BobTahoe on Tue, 21 July 2015 12:18
		Re: 4 Pi Build Progress By: BobTahoe on Tue, 21 July 2015 16:28
		Re: 4 Pi Build Progress By: steve f on Wed, 22 July 2015 02:30
		Re: 4 Pi Build Progress By: BobTahoe on Wed, 22 July 2015 09:30
		Re: 4 Pi Build Progress By: BobTahoe on Thu, 23 July 2015 11:55
		Re: 4 Pi Build Progress By: Wayne Parham on Thu, 23 July 2015 14:34
		Re: 4 Pi Build Progress By: BobTahoe on Thu, 23 July 2015 15:19
		Re: 4 Pi Build Progress By: Wayne Parham on Thu, 23 July 2015 15:39
		Re: 4 Pi Build Progress By: BobTahoe on Thu, 23 July 2015 15:56
		Re: 4 Pi Build Progress By: BobTahoe on Fri, 24 July 2015 11:49
		Re: 4 Pi Build Progress By: Wayne Parham on Fri, 24 July 2015 12:39
		Re: 4 Pi Build Progress By: BobTahoe on Sun, 26 July 2015 00:11
		Re: 4 Pi Build Progress By: johnnycamp5 on Sun, 26 July 2015 08:32
		Re: 4 Pi Build Progress By: BobTahoe on Sun, 26 July 2015 09:43
		Re: 4 Pi Build Progress By: BobTahoe on Sun, 26 July 2015 20:25
		Re: 4 Pi Build Progress By: johnnycamp5 on Mon, 27 July 2015 07:11
		Re: 4 Pi Build Progress By: johnnycamp5 on Mon, 27 July 2015 07:22
		Re: 4 Pi Build Progress By: BobTahoe on Mon, 27 July 2015 22:15
		Re: 4 Pi Build Progress By: BobTahoe on Tue, 28 July 2015 20:16
		Re: 4 Pi Build Progress By: Wayne Parham on Wed, 29 July 2015 14:46
		Re: 4 Pi Build Progress By: johnnycamp5 on Wed, 29 July 2015 17:27
		Re: 4 Pi Build Progress By: johnnycamp5 on Fri, 31 July 2015 06:31
		Re: 4 Pi Build Progress By: BobTahoe on Fri, 31 July 2015 09:39
		Re: 4 Pi Build Progress By: BobTahoe on Sat, 01 August 2015 15:06
		Re: 4 Pi Build Progress By: BobTahoe on Sun, 02 August 2015 23:33
		Re: 4 Pi Build Progress By: Wayne Parham on Mon, 03 August 2015 14:50
		Re: 4 Pi Build Progress By: BobTahoe on Thu, 06 August 2015 16:50
		Re: 4 Pi Build Progress By: BobTahoe on Fri, 07 August 2015 21:26
		Re: 4 Pi Build Progress By: Wayne Parham on Sat, 08 August 2015 08:23
		Re: 4 Pi Build Progress By: BobTahoe on Tue, 01 September 2015 09:44
		Re: 4 Pi Build Progress By: Wayne Parham on Tue, 01 September 2015 23:00
		Re: 4 Pi Build Progress By: BobTahoe on Fri, 04 September 2015 11:43
		Re: 4 Pi Build Progress By: Wayne Parham on Fri, 04 September 2015 15:17
		Re: 4 Pi Build Progress By: BobTahoe on Sat, 12 September 2015 20:05
		Re: 4 Pi Build Progress By: rvsixer on Sat, 12 September 2015 22:55
		Re: 4 Pi Build Progress By: Wayne Parham on Mon, 14 September 2015 11:27
		Re: 4 Pi Build Progress By: BobTahoe on Mon, 21 September 2015 10:08
		Re: 4 Pi Build Progress By: rvsixer on Mon, 21 September 2015 10:23
		Re: 4 Pi Build Progress By: BobTahoe on Mon, 21 September 2015 10:59
		Re: 4 Pi Build Progress By: rvsixer on Tue, 22 September 2015 08:37
		Re: 4 Pi Build Progress By: BobTahoe on Wed, 23 September 2015 15:37
		Re: 4 Pi Build Progress By: BobTahoe on Wed, 23 September 2015 15:56
		Re: 4 Pi Build Progress By: Wayne Parham on Wed, 23 September 2015 17:57
		Re: 4 Pi Build Progress By: skywave-rider on Sat, 26 September 2015 08:39
		Re: 4 Pi Build Progress By: BobTahoe on Tue, 29 September 2015 15:30

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