SpeedLimit Posted March 11, 2022 Share Posted March 11, 2022 Hello everybody Has anyone ever tried to put absorbing foam or rockwoll in the scala (in the bass "dog's house")? Does this bring any improvement in the restitution of the bass? Sorry for my bad american spoken Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted March 11, 2022 Share Posted March 11, 2022 The La Scala AL5 has a foam insert behind the woofer. Quote Link to comment Share on other sites More sharing options...
Shakeydeal Posted March 11, 2022 Share Posted March 11, 2022 So does the LS II. Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 11, 2022 Author Share Posted March 11, 2022 Ok. I have made la Scala clones with peavey FH 1 boxes. I will put some foam behind the woofer (Eminence kappa 15c) Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 11, 2022 Share Posted March 11, 2022 The FH1 is a much bigger dog house ,use a lot more foam Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 11, 2022 Author Share Posted March 11, 2022 Yes RandyH. How much foam and which one? what kind of foam ? Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 11, 2022 Author Share Posted March 11, 2022 like that ? Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 11, 2022 Share Posted March 11, 2022 correct , no 1 or no 2 Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 11, 2022 Author Share Posted March 11, 2022 ok, i will do that .. it's just difficult to find good foam on my little island . I will see tomorrow what i can find Quote Link to comment Share on other sites More sharing options...
KT88 Posted March 11, 2022 Share Posted March 11, 2022 1 hour ago, SpeedLimit said: ok, i will do that .. it's just difficult to find good foam on my little island . I will see tomorrow what i can find I would test it with different amount and listen before you finally assemble everything. I think that too much of the foam could weaken the liveliness of the attack and the impulse. 1 Quote Link to comment Share on other sites More sharing options...
geoff. Posted March 12, 2022 Share Posted March 12, 2022 ...this would be a good experiment to measure, if you had the equipment to measure it with Quote Link to comment Share on other sites More sharing options...
HiFi Heaven Posted March 12, 2022 Share Posted March 12, 2022 Polyfill from a cheap pillow works too. Quote Link to comment Share on other sites More sharing options...
KT88 Posted March 12, 2022 Share Posted March 12, 2022 17 hours ago, SpeedLimit said: ok, i will do that .. it's just difficult to find good foam on my little island . I will see tomorrow what i can find Foam like in your first photo I have often seen in conventional enclosures which means it should work. 1 Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 12, 2022 Author Share Posted March 12, 2022 I have only found like the second photo today. Here it is very hard to find anything for hi-fi... Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 12, 2022 Share Posted March 12, 2022 12 hours ago, HiFi Heaven said: Polyfill from a cheap pillow works too. you are right on , 1 Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 12, 2022 Share Posted March 12, 2022 30 minutes ago, SpeedLimit said: I have only found like the second photo today. Here it is very hard to find anything for hi-fi... you can use any type of foam or insulation or AC filtering materials , the thinner , the better 1)- Computer -server foam , egg crate foam 2)-home insulation 3)-AC , air conditioning dust filter in rolls - Quote Link to comment Share on other sites More sharing options...
SpeedLimit Posted March 12, 2022 Author Share Posted March 12, 2022 egg crat behind the woofer ??? or perhaps haven't we not the same egg protection 😀 Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 12, 2022 Share Posted March 12, 2022 this stuff is the best .... Quote Link to comment Share on other sites More sharing options...
JohnA Posted March 12, 2022 Share Posted March 12, 2022 Stuffing (foam, fiber fill) adds "give" to the woofer's back air chamber, making the woofer think the chamber is larger than it is. if the chamber is sized for the woofer, adding stuffing will cause a ripple in the response curve at its lower limit (though you may get a few more Hz deeper response). I wouldn't unless you have calculated a need for the stuffing. My older La Scalas do not have stuffing, nor did my FH-1s with original Peavey woofers. 2 Quote Link to comment Share on other sites More sharing options...
geoff. Posted March 12, 2022 Share Posted March 12, 2022 Can’t remember where I read it, likely in this forum. It was suggested to put it on parallel sides to reduce reflections. I tried the the white flat stuff pictured above (all I had at the time) tacked on the top AND bottom of my FH-1 bins with a couple spots of PL adhesive years ago. As @KT88 mentioned it KILLED the liveliness. Instantly recognizable as terrible idea. I removed the foam on the bottom and the liveliness came back. I too think the black egg crate foam (doing a 180 around the top of the woofer) would take care of internal reflections without killing “the liveliness of the attack and impulse”. I now have some egg crate foam for projects so I will revisit this with the FH-1s. I have two pairs of LSI Splits that would make for an “easy” comparison actually... one pair with and one without! That’s inspiring. Quote Link to comment Share on other sites More sharing options...
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