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Power / Voltage / Decibel Conversion Charts [message #28197 is a reply to message #28174]

Wed, 18 October 2006 19:57

Wayne Parham
Messages: 18695
Registered: January 2001

Illuminati (33rd Degree)

The measurement datasets are all referenced to 2.0v levels. So the conversion chart below is useful for calculating SPL in terms of power and comparing with other levels. The chart is referenced to 1 watt.

Voltage   Load Impedance  Power       dB
========================================
1.0v          16Ω        62.5mW    -12dB
1.0v          12Ω          83mW  -10.8dB
1.0v           8Ω         125mW     -9dB
1.0v           4Ω         0.25W     -6dB
1.0v           2Ω          0.5W     -3dB
2.0v          16Ω         0.25W     -6dB
2.0v          12Ω         0.33W   -4.8dB
2.0v           8Ω          0.5W     -3dB
2.0v           4Ω           1W       0dB
2.0v           2Ω           2W      +3dB
2.83v         16Ω          0.5W     -3dB
2.83v         12Ω         0.67W   -1.7dB
2.83v          8Ω           1W       0dB
2.83v          4Ω           2W      +3dB
2.83v          2Ω           4W      +6dB
4.0v          16Ω           1W       0dB
4.0v          12Ω         1.3W   +1.25dB
4.0v           8Ω           2W      +3dB
4.0v           4Ω           4W      +6dB
4.0v           2Ω           8W      +9dB
========================================

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[Message index]

		Prosound Shootout By: Wayne Parham on Fri, 11 August 2006 22:59
		I'll be back By: Leland Crooks on Sat, 12 August 2006 08:35
		Re: I'll be back By: Wayne Parham on Sat, 12 August 2006 15:56
		LABhorn wager By: Wayne Parham on Mon, 14 August 2006 00:53
		Re: LABhorn wager By: Manualblock on Mon, 14 August 2006 14:44
		Re: LABhorn wager By: Wayne Parham on Mon, 14 August 2006 15:05
		Re: LABhorn wager By: Manualblock on Mon, 14 August 2006 18:50
		Re: LABhorn wager By: Craig Leerman on Mon, 14 August 2006 17:42
		Re: LABhorn wager By: Wayne Parham on Mon, 14 August 2006 19:37
		Did you say Shootout? By: David Lee on Mon, 14 August 2006 03:25
		Re: Did you say Shootout? By: Wayne Parham on Mon, 14 August 2006 08:41
		Re: Prosound Shootout By: Bill Wassilak on Tue, 15 August 2006 11:46
		Re: Prosound Shootout By: Wayne Parham on Tue, 15 August 2006 12:54
		Re: Prosound Shootout - Discussion and Test Results from the 2005 Shootout By: Wayne Parham on Thu, 24 August 2006 22:26
		Test Plan By: Wayne Parham on Thu, 24 August 2006 22:30
		Date Set - October 13, 2006 By: Wayne Parham on Thu, 24 August 2006 22:34
		Weather Forecast By: Wayne Parham on Tue, 10 October 2006 09:03
		Prosound Shootout 2006 Photos By: Wayne Parham on Sat, 14 October 2006 23:45
		Re: Prosound Shootout 2006 Measurements By: Wayne Parham on Mon, 16 October 2006 20:21
		Re: Prosound Shootout 2006 Measurements By: josh on Tue, 17 October 2006 04:46
		Re: Prosound Shootout 2006 Measurements By: Wayne Parham on Tue, 17 October 2006 08:52
		Re: Prosound Shootout 2006 Measurements By: josh on Tue, 17 October 2006 16:02
		Re: Prosound Shootout 2006 Measurements By: Wayne Parham on Tue, 17 October 2006 20:12
		Attn:BillW By: Leland Crooks on Tue, 17 October 2006 05:46
		SPL By: Wayne Parham on Tue, 17 October 2006 09:03
		Re: SPL By: Brady on Tue, 17 October 2006 16:18
		Re: Attn:BillW By: Bill Wassilak on Tue, 17 October 2006 11:10
		Re: Attn:BillW By: lelandcrooks on Tue, 17 October 2006 14:10
		Re: Prosound Shootout 2006 Measurements By: Sean on Tue, 17 October 2006 16:25
		Re: Prosound Shootout 2006 Measurements By: Wayne Parham on Tue, 17 October 2006 20:17
		Tuba 36 By: Wayne Parham on Wed, 18 October 2006 09:59
		Re: Tuba 36 - Attn: EV drivers were used in this build By: Wayne Parham on Wed, 10 October 2007 12:52
		Cerwin Vega L36 By: Wayne Parham on Wed, 18 October 2006 10:04
		JBL SRX728S By: Wayne Parham on Wed, 18 October 2006 10:09
		Re: JBL SRX728S By: Pascal Pincosy on Fri, 20 October 2006 21:47
		Re: JBL SRX728S By: Wayne Parham on Sat, 21 October 2006 00:38
		Re: JBL SRX728S By: Tom Danley on Wed, 01 November 2006 14:36
		Re: JBL SRX728S By: Wayne Parham on Wed, 01 November 2006 21:09
		Re: JBL SRX728S By: Tom Danley on Thu, 02 November 2006 06:55
		Re: JBL SRX728S By: Wayne Parham on Thu, 02 November 2006 14:44
		Re: JBL SRX728S By: Tom Danley on Thu, 02 November 2006 16:00
		Re: JBL SRX728S By: Wayne Parham on Thu, 02 November 2006 16:14
		Re: JBL SRX728S By: Ivo Liepins on Fri, 01 May 2009 16:14
		Re: JBL SRX728S By: Wayne Parham on Fri, 01 May 2009 20:05
		Soundbridge 7218S By: Wayne Parham on Wed, 18 October 2006 10:15
		Re: Soundbridge 7218S By: Bubblersound on Wed, 18 October 2006 16:09
		Re: Soundbridge 7218S By: Wayne Parham on Wed, 18 October 2006 17:19
		12π By: Wayne Parham on Wed, 18 October 2006 10:31
		BASSMAXX Tripp By: Wayne Parham on Wed, 18 October 2006 10:35
		Comparison of systems By: Wayne Parham on Wed, 18 October 2006 11:01
		Re: Comparison of systems By: Bubblersound on Wed, 18 October 2006 16:17
		Re: Comparison of systems By: Wayne Parham on Wed, 18 October 2006 17:36
		Power / Voltage / Decibel Conversion Charts By: Wayne Parham on Wed, 18 October 2006 19:57
		Distortion Measurements By: Wayne Parham on Fri, 20 October 2006 13:28
		Re: Prosound Shootout 2006 Measurements By: mikebake on Thu, 02 November 2006 15:37
		Re: Prosound Shootout 2006 Measurements By: Wayne Parham on Thu, 02 November 2006 15:55

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