Marvel Posted March 5, 2009 Share Posted March 5, 2009 Who has actually DONE this mod? What were the results? Bill, this was posted a couple of years ago. This was the data by one of the guys (Thermio if I am correct). It looks like about a 7db increase at around 31Hz. That would be a huge difference. Dennis also had a slight eq mod to do on the input of your power amp. but I don't believe this has that mod done, just the volume and porting change: HZ 200 160 125 100 80 63 50 40 31.5 25 20 --- --- --- --- -- -- -- -- ---- -- -- dB 77 80 79 73 72 78 68 60 61 52 51 Stock w/sides braced 76 78 78 73 69 75 65 60 66 56 52 4.5 cuft, no ports 76 78 77 75 74 80 70 60 68 54 54 2 ports 4"dia 10" 76 79 78 76 75 80 71 60 68 54 53 Ports cut to 7" As you can see the numbers don't change much but you were right: the sound does. Much faster and distinct. I am guessing this is a good stopping point with this driver (K33E). It is the best sound of the expansion/port series to my ears but I have only listened a little bit. ------------------------------------------------ As you can see, tuning ports at 7" boosts the 100 to 50Hz range where most of the slam and punch of percieved bass resides, yet the lower bass still has significant gain at 31Hz. A win-win solution. Quote Link to comment Share on other sites More sharing options...
DizRotus Posted March 10, 2009 Share Posted March 10, 2009 Follow this thread Ported La Scalas? and it will direct you to many threads about ported La Scalas. I would do it to any vintage La Scala, whether ot not a sub was also felt to be necessary. Quote Link to comment Share on other sites More sharing options...
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