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Multi-Way Conventional loudspeakers with crossovers

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Old 31st July 2012, 04:00 PM   #621
Starre is offline Starre  Sweden
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Some impressions from today. I will focus on Nora Jones "feels like home" since it was really this CD that was the biggest issue. Before any extra bracing or rods was inserted, this cd was actually impossible to listen to! The voice was so in your face and unpleasant I thought it was something wrong with that recording since other CDs sounded pretty good. Now it is a big difference, voice is not disturbing anymore, more controlled and laid back, and some of the piano notes that hit through is reduced significantly. Is it perfect? No, you can still hear a little coloration from the cabinet but it is not disturbing and on more normal CDs you never hear it. Seems like "feels like home" put my speakers to its toughest test of all my CDs and now I can enjoy it too. Salas, have you listened to this CD on you friends speakers? Would be interesting to hear how it sounds. And with this I consider this speaker project closed for my part .
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Old 31st July 2012, 04:44 PM   #622
Salas is offline Salas  Greece
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ΙI will see into it next time I will visit him. Seems like it had notes they were hitting your cabs resonances right between the eyes. His are mahogany. Yes, for a wooden cab I think you did a very good and detailed bracing job. I wish long time enjoyment of your efforts. Music at home is nice, domesticates the moral.
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Old 31st July 2012, 04:53 PM   #623
Starre is offline Starre  Sweden
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Thanks Nick, appreciate your good work and help.
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Old 31st August 2012, 12:26 PM   #624
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I have evaluated what I have right now, and after putting in about 1 litres of bracing the bass is a little more prominent now, but I have not decided if it is too much or just about right. I am contemplating putting in another small rib at the back making it look like a + to further strenghten the back panel, but I am afraid it might affect bass output making it too prominent. Its volume is only 0.1 liters but since I already is on the edge of loosing balance this might be a bad move since it is not very easy to remove 0.1 litres afterwards (but possible if I use a knife and cut out some parts of the bracings here and there so I will not lose any stability that matters).
I have calculated the total volume of the box as it is now, and it is near 44 litres at the moment. I also tried to move them a little from the back wall and got better bass balance that way, so if I put in that extra bracing this can help if bass gets to prominent. I also put one extra stone each on my stands (making it 2 in total) because I heard a little improvement in sound field and bass clarity. Getting closer to maximize potential I hope .
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Old 31st August 2012, 12:38 PM   #625
Salas is offline Salas  Greece
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The main extras are already there so +0.1lt further can tilt the scales? Maybe if on the verge of coming to acoustic notice, but I would be more concerned about the change in level of free airflow and reflections after too much stuff.
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Old 31st August 2012, 01:00 PM   #626
Starre is offline Starre  Sweden
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Ok Salas, then it will probably not do any harm with that little volume loss. And since it is at the back on the panel itself, I do not think air flow will be affected very much either. If I get rid of more panel sound it is a step forward. I will take it slow and listen before I decide if I want to do this or just leave it as it is. It is not bad at all as it is.
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Old 3rd September 2012, 08:06 AM   #627
Starre is offline Starre  Sweden
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I did the modification I talked about, and it further dampened the back panel a little so it was a good move I think. The bass is as before to my ears. I also tried with the front panel on the stands and it seem to have a positive effect on bass, without it I have a sligt peak in the bass response that is lowererd a little with the panel on. I will also try to reposition the speakers and see if that can smooth the response further.
I think that since the bass level is slightly higher now it easier excites the room nodes, I will investigate that with sending test frequencies with my mobile phone as source since I now have a "smart phone".
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Old 3rd September 2012, 12:19 PM   #628
Salas is offline Salas  Greece
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Extending the reflex tube's length a bit it may bring your Q back to what it was before the air volume deficit for the extra braces.
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Old 3rd September 2012, 01:04 PM   #629
Starre is offline Starre  Sweden
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Ok Salas, good to know if I am not happy with what I got. We are talking one or a few centimeter, right?
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Old 3rd September 2012, 01:23 PM   #630
Salas is offline Salas  Greece
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Yes, judiciously. By some means of not creating abrupt airflow at the exit.
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