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Lascala cabinet resonance


Flevoman

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I'm sorry, but I see a lot of your posts @Stephen Buckas confusing stuff. In some places what you say is debatable (in my view), but in other places you contradict yourself. I'll make a bet that anyone who posts so much in such a short space of time, even without waiting for replies, is usually out again faster than you might think. Not that others do this, you do it by yourself. I appreciate your posts but I have the impression that you post so much that it's impossible to reply because five new posts are being fired off by you in the meantime. 
This leads me to my real question: .... Do you want to be part of this community or do you want to burn off a quick firework and then do the same thing somewhere else...without developing your skills?

If you are not able to wait for a discussion/reaction to your posts but keep on firing with more and more posts, then I have to assume that you don't really care about the answers of the members of this forum. The point is that a forum like this is due to its (thank God)  openness about exchange, sharing experiences and communication, but at the same time it is always a platform for self-promoters for a short time due to their very short half-life. Perhaps you would like to think about this? I am always open to surprises and new impressions. It would be super cool if you only had one start issue. Why? Because a good part of your posts are very relevant and interesting in my view.

 

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4 hours ago, Stephen Buck said:

 … it’s the arrival time of the same frequency from two locations that can either amplify or cancel.  


How can it amplify (sum). I thought it was out of phase wave cancellation? That’s why the response looks like a comb. I don’t see how this could ever be a good thing. 

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48 minutes ago, Stephen Buck said:

Community is in-person.  It’s a canard to think online is really community.  But it’s great for information sharing.  If I ever meet any of you and remember your fake handle online then I might show some regard and defer.  However my oldest friends know I say the darnedest things and they like me for it.  Let’s not try to control each other.  That’s the beginning of real community.  Cheers. 

Actually, a lot of us ARE community. Traveled across country to meet one another, helped one another, helped move equipment and supported one another when ill.

 

So some of us are old timers who have been on here for years and have good friends here. We know each others families, whose living and who is passing away.

 

Cheers

 

 

 

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I've owned the Lascala II for about five years. Recently I placed Isoacoustic pucks between the HF and LF bins, attempting to experiment with isolation benefits. The improvement in clarity is stunning. Apparently the LF bin being only isolated from the top by those 4 rubber feet weren't accomplishing much. I think the LF bin was beating the heck out of the upper bin so much so it was drastically effecting the sound quality. I had a theory that if isolating stuff helped then...well...you got the idea. At first I placed "purple" cushion pieces between but thats when I decided to do the Iso-puck 76's. Surely I'm not the first to discover this Lascala tweak. Forgive me if I'm rehashing a well-known item. The improvement is so dramatic that I couldn't keep this to myself! Lascala II owners need to try this. Cheap and effective. I'll check back to see if anyone tries this or knows about this.  

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1 hour ago, Stephen Buck said:

On used original commercial units redeployed to home use.
 

Commercial plywood LaScalas had commercial woofers with higher SPLs and were often deployed in harsh environments, auditoriums with high temperature and humidity swings over many years. It’s fantastic people find them so good for reuse.  
 

Before you go screw up a pair of AL5s which are MDF/HDF and therefore have different resonance characteristics, I’d consider your SPLs and real world use and actual audible measurements from listening position.  Should be easily done with test tone and mic, to pick up actual signal mismatch and with someone alternately pressing on sidewall to dampen to see if errant signal reduces or goes away.  Probably REW can do it. 


^This

 

Along with the MDF, quite a bit of correction built into the new networks. 

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1 hour ago, Don A. Childs said:

I've owned the Lascala II for about five years. Recently I placed Isoacoustic pucks between the HF and LF bins, attempting to experiment with isolation benefits. The improvement in clarity is stunning...

 

What do you hear with more clarity, the bass or the upper end?

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In answer to the question what did I hear improvement in (the bass or upper end). At first I noticed the clarity of the upper end.  The instruments took on more dimension and realism in that each musical aspect acquired more of its own flavor. this morning I noticed the violins now have that unique violin tone that makes them so intriguing. Let me know if you try it! Oh, now it seems, the bass stands alone in its own world. Much improved   

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Actually cant see a thing except that the HF bin sits about 3/4 " higher than it did. I cut and painted one inch tall 24" long (black) square sticks to hide the pucks and add visual continuity. Raising HF bin helped too. Now the sound stage presentation is more appropriately lifted to a realistic level to my hearing. (May have contributed (1 inch) to the perception of enhanced clarity but one inch higher couldn't account for this massive enhancement since I've often experimented with height adjustments in a million increments.  Do you own Lascalas or know anyone who does? Very curious if Its just me or if this is as dramatic universally?

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On 1/10/2024 at 8:44 AM, Stephen Buck said:

 

 

So what does this mean for me , not much , actually nothing , not in my humble opinion . I’ve compared mono bass to stereo lots of times and concluded that any difference in my home setting is  insignificant . Even this guy seems  to realizes this  , as he insists that we use earphones to detect a change in sound  . Earphones  are different than loudspeakers in that they give significant directional cues even with low bass signals ,unlike room loudspeakers . 🤓

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Mono and stereo will be substantially the same signal , particularly after the common practice of summing when mastering a recording . You may be capable of hearing a differences in some recordings , or maybe you just think that you can hear a difference , but your perception of improvement would definitely be subjective , not universally seen as improvement 🤓

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1 hour ago, Don A. Childs said:

By the way, since I'm the new guy, would there be a better way to interact with the forum on this topic other than tagging onto this discussion?

 

First of all, welcome to the forum, Don. Thank you for asking. I think your topic is worth opening its own thread in this section. You would get more resonance😀. I can't speak for everyone, it's just my opinion. Here in the jungle of all these last pages of posts your concern will be completely lost, it would be the thread drift of a thread drift. Nobody will find anything here that you could open in your new thread.

 

This thread was actually mainly about how an AL5 owner @Flevoman deals with the phenomenon of resonances in his particular case. I'm actually looking forward to hearing what else he has to say about it and whether his girlfriend likes his DSPeaker gear. But maybe he'll open a new thread as well...

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On 1/10/2024 at 8:18 AM, Stephen Buck said:

Will look at this fresh today.  I’m thinking when I tried again my sub might not have warmed up or something else was amiss.  Does the OP have a sub?

 

Im thinking this could be in the realm of the stereo bass arguments you will see everywhere.  For example, one site says “As a general rule of thumb, it’s considered common practice to sum anything below 200hz to mono.”

 

So one idea is to replay the track in mono and see if the problem goes away since it went away when playing one speaker at a time.  I have all my speakers set to full range because well they are full range.  Bass heads will disagree but I like it.  So when I tried it again after system shut down from inactivity, it’s possible my sub was not on, and perhaps the way the sub interacted with the AL5s created the sensation.  Remember when I said the problem was gone when I only played the left but then I said the problem was sort of gone when I only played the right?  Well the sub is on the right.  If my AVR is sending 80Hz and above to mains and not summing the bass and sending to sub (which I believe it is) then the interplay of stereo bass plus sub is showing its effects.

 

Have fun watching YouTube on mixing stereo bass then go listen to the “experts” at audioholics and elsewhere.  
 

will also try the peq setting but that won’t make the effect disappear necessarily.  It will still be there just less audible, and my windows won’t shatter. 

When you high pass your Lascala’s to 80hz, your subwoofer/ subwoofers will take over and you had better have one hell of a subwoofer setup to competently replace the lost Lascala bass  , if you don’t , then it’s not going to sound good ,but  it will sound much better when running full range  , when only the lowest range gets boosted and the Lascala can play out to max benefit . What your  experiencing here is  not enough good subwoofer. And you may be conflating your weak subwoofer as a mono / stereo issue .🤓

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10 minutes ago, Stephen Buck said:

What's with Germans and their need to control others?  Let me break it down for you....

 

1) User complains of cabinet resonance, references specific songs and offsets

2) How many participants tried it?

3) If other users report no cabinet resonance as cause of phenomena, what else could it be?

4) In my experiment: The Isaac Warble is in the mid bass region, disappears when one channel played.

5) This points to the mix, and how it resolves on AL5 with a given setup, does not occur on NS-5000s but different location offset.

6) Arguments ensue about bass mixing, two videos of pro-stereo bass presented, showing biggest most modern artists are using it.  

7) Isaac mix is old, waiting for mix engineer to respond to email.  Probably heard it a million times.  New Isaac video has different EQ of his voice.  Problem solved.  

😎 Problem goes away in my experiment if PEQ and tone controls set flat, tried PEQ of 148Hz, Q:8, -7db with no audible difference at :37.  

😎 Fascists continue to point and shoot and not do anything useful. 

I figured it was just a matter of time until you crossed the line  🤓.what a dumb Buck .

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50 minutes ago, KT88 said:

 

First of all, welcome to the forum, Don. Thank you for asking. I think your topic is worth opening its own thread in this section. You would get more resonance😀. I can't speak for everyone, it's just my opinion. Here in the jungle of all these last pages of posts your concern will be completely lost, it would be the thread drift of a thread drift. Nobody will find anything here that you could open in your new thread.

 

This thread was actually mainly about how an AL5 owner @Flevoman deals with the phenomenon of resonances in his particular case. I'm actually looking forward to hearing what else he has to say about it and whether his girlfriend likes his DSPeaker gear. But maybe he'll open a new thread as well...

 

I did indeed open this topic with the question of whether the AL-5 perhaps has resonance, causing annoying background noises in the music. Thanks to a lot of information and help, I now finally know at least what I hear (a thickening in the 100Hz-160Hz range). I have been able to form my own view on the reason for this, and I want to provide a more well-founded explanation here this weekend. Now it's up to me to decide what I want to do about it and how.🙄

 

Regarding the DSpeaker, I will test it further tomorrow with my girlfriend, but if there is interest, I'm willing to open a topic sharing my findings on the DSpeaker. If so, let me know 

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Alot of topics covering the subject on the LS resonance.

My summation is while not perfect, all LS have the inherited ability to expose garbage in garbage out of less than quality sources, be they live or recorded.

Lyrics resolving, musically fascinating hi-fi loudspeaker by design.

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