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Need subs that will do 20hz-40hz
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<blockquote data-quote="Art Welter" data-source="post: 49960" data-attributes="member: 52"><p>Re: Need subs that will do 20hz-40hz</p><p></p><p></p><p>Josh Ricci’s Gjallerhorn at 2 meter, ground plane, outdoors measures:</p><p>10hz 90.2db</p><p>12.5hz 105.2db</p><p>16hz 118.3db</p><p>20hz 122db</p><p>25hz 124.9db</p><p>31.5hz 125.8db</p><p>40hz 128.4db</p><p>50hz 127.2db</p><p>63hz 130.2db</p><p>80hz 130.9db</p><p>100hz 131.1db</p><p>125hz 123.6db</p><p></p><p>Add 6 dB to those figures for a one meter equivalency, and a bit more for indoor corner loading.</p><p></p><p>At 1000HZ, adding 10 dB SPL sounds twice as loud, while at 20 HZ adding only 5 dB SPL sounds twice as loud.</p><p>Although Hoffman's iron law prevents most P.A. subs from attempting much below 30-40Hz, if a box is designed for output below that, a little goes a longer way, the Gjallerhorn at 128 dB (one meter) 20Hz is seriously seismic.</p><p></p><p>As well as SPL, Josh has done distortion and impulse response tests on many LF designs:</p><p><a href="http://www.data-bass.com/blog" target="_blank">Data-Bass</a></p><p></p><p>That the Gjallerhorn can do the output listed above with (relative for LF) very low distortion is quite impressive.</p><p></p><p>Art</p></blockquote><p></p>
[QUOTE="Art Welter, post: 49960, member: 52"] Re: Need subs that will do 20hz-40hz Josh Ricci’s Gjallerhorn at 2 meter, ground plane, outdoors measures: 10hz 90.2db 12.5hz 105.2db 16hz 118.3db 20hz 122db 25hz 124.9db 31.5hz 125.8db 40hz 128.4db 50hz 127.2db 63hz 130.2db 80hz 130.9db 100hz 131.1db 125hz 123.6db Add 6 dB to those figures for a one meter equivalency, and a bit more for indoor corner loading. At 1000HZ, adding 10 dB SPL sounds twice as loud, while at 20 HZ adding only 5 dB SPL sounds twice as loud. Although Hoffman's iron law prevents most P.A. subs from attempting much below 30-40Hz, if a box is designed for output below that, a little goes a longer way, the Gjallerhorn at 128 dB (one meter) 20Hz is seriously seismic. As well as SPL, Josh has done distortion and impulse response tests on many LF designs: [url=http://www.data-bass.com/blog]Data-Bass[/url] That the Gjallerhorn can do the output listed above with (relative for LF) very low distortion is quite impressive. Art [/QUOTE]
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Need subs that will do 20hz-40hz
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