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<blockquote data-quote="Art Welter" data-source="post: 84545" data-attributes="member: 52">Re: PK SoundI have not heard the TC sounds LMS 5400, but Josh Ricci has done extensive testing of it and many other LF drivers (results at his DataBass website), including the best of the B&amp;C LF drivers. I have heard the BC 18SW115-4 (I own a pair) and the BC 21SW115, and Josh&#039;s measurements indicate the LMS 5400 is a LF winner in the deep LF. Using a program like Hornresp it is easy to compare driver&#039;s output potential, if the T.S. parameters are correct.Pretty much all the major manufacturers give good T.S. parameters, it is easy to see where the current &quot;state of the art&quot; is with comparisons.Josh Ricci’s&nbsp; TC sounds LMS 5400 18&quot; (single driver) Gjallerhorn at 2 meter, ground plane, outdoors measures:10hz 90.2db12.5hz 105.2db16hz 118.3db20hz 122db25hz 124.9db31.5hz 125.8db40hz 128.4db50hz 127.2db63hz 130.2db80hz 130.9db100hz 131.1db125hz 123.6dbAdd 6 dB to those figures for a one meter equivalancy.Those are real measured results with fairly low distortion, not theoretical numbers on paper calculated at astronomical peak values with no regard to excursion capability, the norm for spec sheets.Art</blockquote>

[QUOTE="Art Welter, post: 84545, member: 52"] Re: PK Sound I have not heard the TC sounds LMS 5400, but Josh Ricci has done extensive testing of it and many other LF drivers (results at his DataBass website), including the best of the B&C LF drivers. I have heard the BC 18SW115-4 (I own a pair) and the BC 21SW115, and Josh's measurements indicate the LMS 5400 is a LF winner in the deep LF. Using a program like Hornresp it is easy to compare driver's output potential, if the T.S. parameters are correct. Pretty much all the major manufacturers give good T.S. parameters, it is easy to see where the current "state of the art" is with comparisons. Josh Ricci’s TC sounds LMS 5400 18" (single driver) 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 equivalancy. Those are real measured results with fairly low distortion, not theoretical numbers on paper calculated at astronomical peak values with no regard to excursion capability, the norm for spec sheets. Art [/QUOTE]

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