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Attempt [message #16891 is a reply to message #16890]

Tue, 24 August 2004 22:54

Mike.e
Messages: 471
Registered: May 2009

Illuminati (1st Degree)

Basically youl notice-
Home theatre subs are are inefficient
Small box subs are inefficient too.
Larger drivers tend to be more efficient
Lower Qts drivers are more efficient

Prosound 12"s and 15"s are efficient,they have higher Fs,Mid Q,and larger box requirements.

Efficient cone drivers are often Low Qts high BL(ie powerful and in control) fullranger units with added HF efforts.

II) Mid-Band, Reference Efficiency (%)
(Infinite Baffle Mounting Assumed)

[n0]
= ([p0]*[Bl]^2)/(2*[pi]*[c]*([Sd]^2)*[Re]*([Mas]^2))
= (4*([pi]^2)*([fs]^3)*[Vas])/(([c]^3)*[Qes])

Youl notice its fs^3 * vas.

Equations at the link

Is there a mathematical correlation to no% and sensitivity?

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[Message index]

		What makes a driver efficient? By: Ralph on Tue, 24 August 2004 18:06
		Attempt By: Mike.e on Tue, 24 August 2004 22:54
		Formula By: Ralph on Wed, 25 August 2004 19:12
		Re: What makes a driver efficient? By: Manualblock on Wed, 25 August 2004 08:45
		That's pretty much it By: Bill Fitzmaurice on Wed, 25 August 2004 09:22
		Power to weight ratio By: Ralph on Wed, 25 August 2004 19:14

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