Dave MacKay Posted September 2, 2021 Share Posted September 2, 2021 Is there a reason why Klipsch didn't fit a "plug" to fill the cut-out that provides access to the woofer in the La Scala? I wondered if the cut-out was left for manufacturing convenience or if that void might be part of the acoustic path design. I'm wondering if it might be a good idea to fit a plug to fill the void and attach it to the access panel. This would provide a (more or less) smooth surface under the woofer, without impeding access to it. I didn't find anything related to this question when searching the forum. I'm sorry if it has been discussed already 1 Quote Link to comment Share on other sites More sharing options...
jimjimbo Posted September 2, 2021 Share Posted September 2, 2021 I can only assume that during engineering and testing that a "plug" was not found to be necessary. 1 1 Quote Link to comment Share on other sites More sharing options...
DizRotus Posted September 2, 2021 Share Posted September 2, 2021 Redundant post. See below. Quote Link to comment Share on other sites More sharing options...
TFR1 Posted September 2, 2021 Share Posted September 2, 2021 This pic doesn't look like my LaScala. Mine have a removable panel that provides access to the Woofer. 1 Quote Link to comment Share on other sites More sharing options...
DizRotus Posted September 2, 2021 Share Posted September 2, 2021 1 hour ago, Dave MacKay said: I'm wondering if it might be a good idea to fit a plug to fill the void and attach it to the access panel. No. The opening is sealed by the bottom panel. Filling that opening with a 3/4” piece so as to make it flush with the rest of the “floor” of the doghouse is totally unnecessary. It would result in a minuscule reduction of the interior volume of the doghouse with no effect on performance. As PWK would say, not a dime’s worth of difference. The foregoing is my opinion. YMMV 5 1 Quote Link to comment Share on other sites More sharing options...
Dave MacKay Posted September 2, 2021 Author Share Posted September 2, 2021 27 minutes ago, DizRotus said: No. The opening is sealed by the bottom panel. Filling that opening with a 3/4” piece so as to make it flush with the rest of the “floor” of the doghouse is totally unnecessary. It would result in a minuscule reduction of the interior volume of the doghouse with no effect on performance. As PWK would say, not a dime’s worth of difference. The foregoing is my opinion. YMMV Thanks. That makes sense. I won't bother making a "plug" for the access port. Quote Link to comment Share on other sites More sharing options...
Dave MacKay Posted September 2, 2021 Author Share Posted September 2, 2021 29 minutes ago, TFR1 said: This pic doesn't look like my LaScala. Mine have a removable panel that provides access to the Woofer. The photo shows the La Scala with that access panel removed. Quote Link to comment Share on other sites More sharing options...
billybob Posted September 2, 2021 Share Posted September 2, 2021 Thought the idea was to stay out of it. Quote Link to comment Share on other sites More sharing options...
TFR1 Posted September 8, 2021 Share Posted September 8, 2021 On 9/2/2021 at 11:12 AM, Dave MacKay said: The photo shows the La Scala with that access panel removed. The OP's photo shows a new piece of plywood has replaced the original bottom panel. An original bottom has a lip, all the way around the opening that forms a surface for a gasket and a place for the screws to attach the "dog house" door to the bottom panel. 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted September 9, 2021 Share Posted September 9, 2021 27 minutes ago, TFR1 said: An original bottom has a lip, all the way around the opening that forms a surface for a gasket and a place for the screws to attach the "dog house" door to the bottom panel. Not on the ones I have had. Screw holes, yes, visible once the bottom is removed. That's it. Quote Link to comment Share on other sites More sharing options...
TFR1 Posted September 9, 2021 Share Posted September 9, 2021 When I removed the access panel on my LSI's, They were gasketed and screwed. (bought from the original owner who claimed that they were completely original) I jumped to the conclusion that all LaScala's were constructed similarly. Quote Link to comment Share on other sites More sharing options...
karlson3 Posted September 9, 2021 Share Posted September 9, 2021 I had a friend suggest I could improve a Karlson box by filling the front with concrete. Quote Link to comment Share on other sites More sharing options...
Coytee Posted September 9, 2021 Share Posted September 9, 2021 Ironic in that.... isn't there a riser for the LaScala that creates MORE volume in there....and here we're talking about adding a 3/4" piece of plywood that in absolute terms, would further reduce the volume in there?? (I realize it won't matter, I just see some irony there, presuming I understand the physics correctly) Quote Link to comment Share on other sites More sharing options...
JohnA Posted September 9, 2021 Share Posted September 9, 2021 The back air chamber volume of a La Scala is small already. Reducing it would hurt bass output. Don't. Quote Link to comment Share on other sites More sharing options...
OO1 Posted September 9, 2021 Share Posted September 9, 2021 36 minutes ago, karlson3 said: I had a friend suggest I could improve a Karlson box by filling the front with concrete. Better to use sand--if you dont like t , it can be removed , concrete not so sure Quote Link to comment Share on other sites More sharing options...
Dave A Posted September 9, 2021 Share Posted September 9, 2021 Extra cost for no benefit. JohnA is right and "A front loaded horn design needs a closed space behind the speaker (woofer)for proper loading ". I would imagine that PWK figured out how much was needed and the bottom cutout would be a part of that. http://www.bd-design.nl/contents/en-us/d26_Bass_Horn_Design.html 1 Quote Link to comment Share on other sites More sharing options...
Rockets Posted September 11, 2021 Share Posted September 11, 2021 DJK, and Carl Huff had some interesting observations and graphs in the post below on the subject. La Scala Mod Project Completed La Scala Mod Project Completed - Technical/Modifications - The Klipsch Audio Community Notably, "Clearly the Klipsch La Scala can be improved by reducing the volume of the sealed enclosure." 3 1 Quote Link to comment Share on other sites More sharing options...
Dave A Posted September 11, 2021 Share Posted September 11, 2021 6 hours ago, Rockets said: DJK, and Carl Huff had some interesting observations and graphs in the post below on the subject. La Scala Mod Project Completed La Scala Mod Project Completed - Technical/Modifications - The Klipsch Audio Community Notably, "Clearly the Klipsch La Scala can be improved by reducing the volume of the sealed enclosure." OK that is interesting. I wonder why this mod never gained traction with more adherents talking about it. First time I had ever heard of this with the La Scala. Quote Link to comment Share on other sites More sharing options...
KT88 Posted September 11, 2021 Share Posted September 11, 2021 11 hours ago, Rockets said: DJK, and Carl Huff had some interesting observations and graphs in the post below on the subject. La Scala Mod Project Completed La Scala Mod Project Completed - Technical/Modifications - The Klipsch Audio Community Notably, "Clearly the Klipsch La Scala can be improved by reducing the volume of the sealed enclosure." Many thanks for the link. A question from an interested layman, is this simply a bass reflex extension where you have to be careful that the original horn still works (e.g. via the experimentally determined port length of the two tubes as described in the text), or can this design be called a tapped horn because it is tapped at the compression chamber? I don't understand why then the compression chamber still works when you take away its pressure buildup by opening it? On the other hand...doesn't the new Jubilee work similarly? Sorry for my uneducated questions. Quote Link to comment Share on other sites More sharing options...
Marvel Posted September 11, 2021 Share Posted September 11, 2021 The LS horn is only good to around 125Hz., below that is more like a direct radiator. Quote Link to comment Share on other sites More sharing options...
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