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97dB [message #34938 is a reply to message #34937]

Wed, 30 January 2002 07:50

Wayne Parham
Messages: 18757
Registered: January 2001

Illuminati (33rd Degree)

250 watts is a 23dB increase over 1 watt, so if the 250 watt measurement maxes out at 120dB, I'd expect the maximum 1 watt SPL to be 97dB at 1 meter. I'm guessing at 250 watts, it is losing 1dB or so to thermal compression so it's 97dB to 98dB at 1 watt / 1 meter. At 500 watts, it probably loses 3dB to 4dB, but thermal losses aren't quite that high at 250 watts. Also note that Bill said the passband average was 115dB, so most of the bass range would be closer to 92dB. Used as a midwoofer in a two-way speaker, you can expect midrange output to be 3-6dB louder than bass below 100Hz.

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[Message index]

		Attention: If you own JBL 3677S click here By: BillEpstein on Tue, 29 January 2002 18:44
		Good information By: Wayne Parham on Tue, 29 January 2002 20:04
		Re: Good information By: Adam on Tue, 29 January 2002 20:08
		Re: Attention: If you own JBL 3677S click here By: spkrman57 on Wed, 30 January 2002 06:33
		97dB By: Wayne Parham on Wed, 30 January 2002 07:50
		Re: Attention: If you own JBL 3677S click here By: spkrman57 on Wed, 30 January 2002 09:52
		Things and stuff By: Wayne Parham on Wed, 30 January 2002 10:32
		Thanks nt. By: Robert Hamel on Thu, 31 January 2002 06:01

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