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Junior Varsity
Yes, it's cliche, yes it's overdiscussed, but yes, I need new subs.
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<blockquote data-quote="Art Welter" data-source="post: 33736" data-attributes="member: 52"><p>Re: Yes, it's cliche, yes it's overdiscussed, but yes, I need new subs.</p><p></p><p></p><p>Silas,</p><p></p><p>Different designs all have their own advantages.</p><p></p><p>FLH (front loaded horn) designs like the LABsub probably have the most efficiency in multiples.</p><p></p><p>TH (tapped horn) designs have slightly less efficiency, but do not require multiple units to get low frequency extension.</p><p></p><p>BR (bass reflex designs) and bandpass designs can be made smaller than the above, using more speakers and more amp power can put out more level per truck space.</p><p></p><p>I have been using my new Keystone TH subs rather than the BR Lab 12s</p><p></p><p><a href="http://www.soundforums.net/live/threads/134-FREE-SUB-PLAN-Dual-Lab12-%28Front-Loaded%29-by-Welter-Systems" target="_blank">http://www.soundforums.net/live/threads/134-FREE-SUB-PLAN-Dual-Lab12-(Front-Loaded)-by-Welter-Systems</a></p><p></p><p>now for a while.</p><p>One Keystone outperforms 2 of the Lab 12 ported subs, in exactly the same truck space.</p><p></p><p>For what it’s worth, four of the dual Lab 12 cabinets using only a pair of Crest CA-9 to drive them have more output at 40 Hz than eight Meyers 650P dual 18 cabinets .</p><p></p><p>I have no doubt that a pair of the Keystone 18 cabinets with a bit more power would outperform a LABsub, and take up about the same truck space.</p><p></p><p>The Keystone 18 using the BC18SW115-4 has almost the same phase and magnitude response as the DSL TH-118s that Langston Holland uses, though his are loaded with the 18 Sound NLW9600-4.</p><p></p><p>Plans for the Keystone are in this thread:</p><p><a href="http://www.diyaudio.com/forums/subwoofers/185588-keystone-sub-using-18-15-12-inch-speakers.html" target="_blank">http://www.diyaudio.com/forums/subwoofers/185588-keystone-sub-using-18-15-12-inch-speakers.html</a></p><p>Don't forget the bracing!</p><p></p><p>More information in these threads:</p><p><a href="http://www.diyaudio.com/forums/subwoofers/184992-tapped-horn-vs-bass-reflex-case-study.html" target="_blank">http://www.diyaudio.com/forums/subwoofers/184992-tapped-horn-vs-bass-reflex-case-study.html</a></p><p><a href="http://www.diyaudio.com/forums/subwoofers/184986-horn-extender-wave-guide-th.html" target="_blank">http://www.diyaudio.com/forums/subwoofers/184986-horn-extender-wave-guide-th.html</a></p><p></p><p>Art Welter</p></blockquote><p></p>
[QUOTE="Art Welter, post: 33736, member: 52"] Re: Yes, it's cliche, yes it's overdiscussed, but yes, I need new subs. Silas, Different designs all have their own advantages. FLH (front loaded horn) designs like the LABsub probably have the most efficiency in multiples. TH (tapped horn) designs have slightly less efficiency, but do not require multiple units to get low frequency extension. BR (bass reflex designs) and bandpass designs can be made smaller than the above, using more speakers and more amp power can put out more level per truck space. I have been using my new Keystone TH subs rather than the BR Lab 12s [url]http://www.soundforums.net/live/threads/134-FREE-SUB-PLAN-Dual-Lab12-%28Front-Loaded%29-by-Welter-Systems[/url] now for a while. One Keystone outperforms 2 of the Lab 12 ported subs, in exactly the same truck space. For what it’s worth, four of the dual Lab 12 cabinets using only a pair of Crest CA-9 to drive them have more output at 40 Hz than eight Meyers 650P dual 18 cabinets . I have no doubt that a pair of the Keystone 18 cabinets with a bit more power would outperform a LABsub, and take up about the same truck space. The Keystone 18 using the BC18SW115-4 has almost the same phase and magnitude response as the DSL TH-118s that Langston Holland uses, though his are loaded with the 18 Sound NLW9600-4. Plans for the Keystone are in this thread: [url]http://www.diyaudio.com/forums/subwoofers/185588-keystone-sub-using-18-15-12-inch-speakers.html[/url] Don't forget the bracing! More information in these threads: [url]http://www.diyaudio.com/forums/subwoofers/184992-tapped-horn-vs-bass-reflex-case-study.html[/url] [url]http://www.diyaudio.com/forums/subwoofers/184986-horn-extender-wave-guide-th.html[/url] Art Welter [/QUOTE]
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Junior Varsity
Yes, it's cliche, yes it's overdiscussed, but yes, I need new subs.
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