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Subwoofers with 30hz performance.
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<blockquote data-quote="Art Welter" data-source="post: 26748" data-attributes="member: 52"><p>Re: Subwoofers with 30hz performance.</p><p></p><p></p><p>John,</p><p></p><p>I agree with you regarding LF cutoff points, though McCauly does not show a chart on the 421, the specs imply about 149 dB above 20 Hz, which would make 16 Hz about 136 dB (10 dB down from -3 dB), at that rate 12 Hz would be around 126 dB. That will still make your pants legs flutter.</p><p></p><p>That said, the Basstech 7 has a similar or even steeper rate of decline, in groups of four it drops from 142 dB at 30 Hz to 132 dB at 25 Hz, 10 dB in less than 1/3 octave.</p><p></p><p>Hard to tell the cutoff rate on the Contra, according to the spec sheet I have the -3 dB point is 15 Hz, it drops only one dB per 1 Hz from 17 to 15 Hz.</p><p></p><p>Tom Danley wrote that the maximum output was 112 dB at 14 Hz, I expect that is a +6 power figure.</p><p>Considering the graph stops at 15.8 Hz, I expect the Contra takes a nose dive below that point, perhaps you could tell us what it does below 14 Hz?</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 26748, member: 52"] Re: Subwoofers with 30hz performance. John, I agree with you regarding LF cutoff points, though McCauly does not show a chart on the 421, the specs imply about 149 dB above 20 Hz, which would make 16 Hz about 136 dB (10 dB down from -3 dB), at that rate 12 Hz would be around 126 dB. That will still make your pants legs flutter. That said, the Basstech 7 has a similar or even steeper rate of decline, in groups of four it drops from 142 dB at 30 Hz to 132 dB at 25 Hz, 10 dB in less than 1/3 octave. Hard to tell the cutoff rate on the Contra, according to the spec sheet I have the -3 dB point is 15 Hz, it drops only one dB per 1 Hz from 17 to 15 Hz. Tom Danley wrote that the maximum output was 112 dB at 14 Hz, I expect that is a +6 power figure. Considering the graph stops at 15.8 Hz, I expect the Contra takes a nose dive below that point, perhaps you could tell us what it does below 14 Hz? Art [/QUOTE]
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