Ported LaScala (Tribute to the late DJK)
- Thread starter THD+N
- Start date
Invidiosulus
Well-Known Member
Bracing at a single point in the middle of the sidewall would still allow a lot of vibration at the first harmonic of what lever frequency it is that causes the sidewall to flex in the first place.
Not that it wouldn’t help, but if you are building from scratch then go ahead and put some more substantial bracing in there.
Not that it wouldn’t help, but if you are building from scratch then go ahead and put some more substantial bracing in there.
It will take some time, but I am certain you will like the results.
I can't wait to build some this fall/winter for our outdoor campground pavilion.
Posted July 11, 2010
Ported Lascala update, I have been running these for some time now, and they are really growing on me. For the most part I have never been a big fan of the Lascala because of their lack of low frequency extension. A few of my freinds had Lascala, and I simply prefered the Cornscala's overall.
Now that I have the Ported Lascala's in the theater room I have been really enjoying them. I have been sneaking in some music from time to time, but until today while my wife was out of town and I was home alone for the first time in weeks, it was time to hit the throttle and see what these can really do. I started with Sade's newest release. I have to say so far I am not overly thrilled with Sade's choice of using synthesized bass tracks in all of her new songs, but it brought to my attention these Lascala's can produce huge amounts of low frequency bass. I proceeded to turn off the subs because the Lascala's had plenty of bass on their own, only to find the subs were already off and the front 2 channel stereo was the only thing playing.
I didn't believe it possible til today for a Lascala to produce earthshaking bass at insane volume levels and still be absolutely clear, and have to admit I am a convert. I still love the Cornscala's but the Ported Lascala's are so much fun to listen to, I have to say they are the flavor of the week. Very similar to being at a concert.
Dave Harris
Ported Lascala update, I have been running these for some time now, and they are really growing on me. For the most part I have never been a big fan of the Lascala because of their lack of low frequency extension. A few of my freinds had Lascala, and I simply prefered the Cornscala's overall.
Now that I have the Ported Lascala's in the theater room I have been really enjoying them. I have been sneaking in some music from time to time, but until today while my wife was out of town and I was home alone for the first time in weeks, it was time to hit the throttle and see what these can really do. I started with Sade's newest release. I have to say so far I am not overly thrilled with Sade's choice of using synthesized bass tracks in all of her new songs, but it brought to my attention these Lascala's can produce huge amounts of low frequency bass. I proceeded to turn off the subs because the Lascala's had plenty of bass on their own, only to find the subs were already off and the front 2 channel stereo was the only thing playing.
I didn't believe it possible til today for a Lascala to produce earthshaking bass at insane volume levels and still be absolutely clear, and have to admit I am a convert. I still love the Cornscala's but the Ported Lascala's are so much fun to listen to, I have to say they are the flavor of the week. Very similar to being at a concert.
Dave Harris
I now have the pair of Celestion TF1525's in my ported LaScala's versus the GRS K33. It's a toss up... both brands of woofers sound exceptional in the ported configuration.
The TF1525 has been out for years and looks like it may be harder to come by, versus the GRS K33. It's also a few dollars more.
It is too soon to tell, but the TF1525 may sound a bit better in the upper midrange (similar to the Kappa 15C). I still have to run some REW curves to see exactly what is happening, but that does not tell you everything.
The TF1525 has been out for years and looks like it may be harder to come by, versus the GRS K33. It's also a few dollars more.
It is too soon to tell, but the TF1525 may sound a bit better in the upper midrange (similar to the Kappa 15C). I still have to run some REW curves to see exactly what is happening, but that does not tell you everything.
Gigantic
A big, big love
our very own @Daveintn has a great thread about bracing the doghouse: https://community.klipsch.com/index.php?/topic/185850-la-scala-bass-bin-mid-brace/
Since the standard type brace is so prevalent (not e-brace), I would say that it works and any resonance left is much further down dB wise and probably not an issue.
I think the e-brace is effective too, but it would be interesting to see before and after REW curves to see the difference.
I think the e-brace is effective too, but it would be interesting to see before and after REW curves to see the difference.
I thought this was interesting since the Celestion TF series woofers use Kevlar loaded paper. Kevlar is used for many industrial & commercial applications such as bullet proof vests and the helmets we wore (wear) in the Army.
The first section is the most interesting for those who don't want to glance over the entire PDF;
The first section is the most interesting for those who don't want to glance over the entire PDF;
Invidiosulus
Well-Known Member
I did the bracing on mine and it sounded significantly better but it was before I had my UMIK to run any curves on it.
Even with the bracing in place, Roy’s notch at 148Hz also provided a big boost in clarity.
Even with the bracing in place, Roy’s notch at 148Hz also provided a big boost in clarity.
Daveintn
Well-Known Member
Well I have no curves but my subjective opinion is that adding the mid brace is the cheapest most significant improvement you can make. Until you have removed that cabinet resonance for the first time you simply have no idea how bad it really is. After that you move on to SMAHL's and recapped AA crossovers with no zeners and you wonder why Klipsch sold those La Scalas with such design flaws for so long. Dragged kicking and screaming into better audio they finally made 1" sidewalls but then they did it with execrable glued sawdust.
If you think the older plywood stock La Scalas are good wait until you unlock the great sound potential which will amaze you. For years when I used to get La Scalas or LSI's to fix up they all got the treatment. You do these three things you won't need REW except as an academic curiosity to confirm what you allready knew when you heard those La Scalas done right.
It's the Horns that make them fun WITH the ported bass extension. But I'm sure Indiosulus will have lots of fun too with a THT that get below 20 Hz.
For the standard type brace, it is well established that the resonance is damped. However, (it appears) the e-brace has not been documented as far as its effectiveness so some REW measurements would be prudent to see what is going on.
I don't trust me ears (and most people should not) and measurements are so easy to confirm what you think or don't think you hear.
Gigantic
A big, big love
I appreciate the discreet elegance of the e brace, but the lack of measurement makes me less than interested in them; I don't want to be a guinea pig in that way. The standard price will do just fine.
Invidiosulus
Well-Known Member
There is no reason for that brace to be E shaped. The side panels are already firmly attached at the top and bottom.
The middle(vertically), front half of the sides are the furthest from any bracing on the stock design.
The middle(vertically), front half of the sides are the furthest from any bracing on the stock design.
Any brace is better than no brace at all. I had the Unbraced version of the FH-1 and the small triangles in the braced version, a few years later, was much better. It's not that it will blow out the lumber budget. LOL