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Three pi subs 92 db ? [message #53070]

Sat, 10 January 2009 22:44

Wayne-o
Messages: 225
Registered: May 2009

Master

How do you get 92 db ? does the box add gain to the 89 db lab 12 ?
THANKS

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Re: Three pi subs 92 db ? [message #53071 is a reply to message #53070]

Sun, 11 January 2009 12:01

Matts
Messages: 359
Registered: May 2009

Grand Master

bass reflex designs use energy from the rear of the speaker interacting with the volume of air in the port to give some additional efficiency over sealed box designs

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Re: Three pi subs 92 db ? [message #53072 is a reply to message #53070]

Sun, 11 January 2009 14:51

Wayne Parham
Messages: 18783
Registered: January 2001

Illuminati (33rd Degree)

You might notice the page where that spec is listed gives conditions where measurements were taken. All specs are given at 2.83v/M rather than 1w/M. The woofer is a 4Ω part, so 1 watt is dissipated with a 2.0v drive signal. Send it 2.83v and 2W is dissipated, which is 3dB higher.

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