greenhorn
Well-Known Member
I was till recently under the impression that a speakers frequency response was the same no matter what power level you were driving it at.
I was looking at matching an ahuja sub driver to a philips hiq woofer for open baffle. the philips is 93db @ 1W, and the ahuja is 98@1W, but still manages around 90db @ 40hz, and 80dB at 20.
http://www.ahujaradios.co.in/Document/0-d2-L12-MB200_SP.pdf
I assumed that i since the ahuja driver could handle 200W RMS of input, that with a 200W amp, = +23db compared to 1W, the amp would easily be able to manage 90db till 20hz.
but while designing the system using the linkwitz site material, i found that the SPL at lower frequencies is limited due to xmax (the driver claims 2.5mm)
and after pluggin in the TS parameters of the woofer the attatched worksheet http://www.linkwitzlab.com/spl_max1.xls
claimed that the woofer would be able to manage 90db till only 50hz or so because of the xmax limitation.
so back to my question.
Does the xmax apply an overall envelope to the LF (just like the heat sink capacity puts an envelope on power handling, and that with higher levels, you get lesser LF response (like an op amp's LF reduces at higher gains)
Or do you get the same frequency response at all power levels, in which case how do i interpret the xcel sheet model?
I was looking at matching an ahuja sub driver to a philips hiq woofer for open baffle. the philips is 93db @ 1W, and the ahuja is 98@1W, but still manages around 90db @ 40hz, and 80dB at 20.
http://www.ahujaradios.co.in/Document/0-d2-L12-MB200_SP.pdf
I assumed that i since the ahuja driver could handle 200W RMS of input, that with a 200W amp, = +23db compared to 1W, the amp would easily be able to manage 90db till 20hz.
but while designing the system using the linkwitz site material, i found that the SPL at lower frequencies is limited due to xmax (the driver claims 2.5mm)
and after pluggin in the TS parameters of the woofer the attatched worksheet http://www.linkwitzlab.com/spl_max1.xls
claimed that the woofer would be able to manage 90db till only 50hz or so because of the xmax limitation.
so back to my question.
Does the xmax apply an overall envelope to the LF (just like the heat sink capacity puts an envelope on power handling, and that with higher levels, you get lesser LF response (like an op amp's LF reduces at higher gains)
Or do you get the same frequency response at all power levels, in which case how do i interpret the xcel sheet model?