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Multi-Way Conventional loudspeakers with crossovers

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Old 8th June 2012, 07:16 PM   #481
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Starre how is the grand piano reproduction now?Are you satisfied?Does it sound's clean at all registers?
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Old 8th June 2012, 08:31 PM   #482
Starre is offline Starre  Sweden
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I will listen to that when possible, Dufus, I will report later.
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Old 9th June 2012, 02:36 PM   #483
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Default Listening

I have listened to some Liszt piano music today and can report it sounds just fine. Less disturbing colorations from the cabinets and it sounds clean over all. Of course it is not perfect but it is a clear improvement. So Dufus, I am pleased with it.
If I had not already built it, I would have choosen to use plywood instead of MDF because it is stiffer and need less bracing to sound good if I am not wrong.
Well that is all for now, I am going outside enjoying nature and the water watching wild life and taking a nice walk .
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Old 9th June 2012, 05:13 PM   #484
Salas is offline Salas  Greece
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Russian birch ply is standard in pro cabs.
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Old 10th June 2012, 11:09 AM   #485
Starre is offline Starre  Sweden
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If I do another speaker project I will try that, Salas.
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Old 12th June 2012, 10:21 AM   #486
Starre is offline Starre  Sweden
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Default More changes.

I was not quite satisfied with the extra bracing (still some panel distorsion) so I put in another 25mm round rod and glued it together with the first one from side to side. This made all the difference, it is now almost completely dead, could this be heard when listening? You bet! Midrange detail is much better! I really recommend anyone to carefully listen to side panels on speakers to be sure it is not making any sound, it makes a big difference! Even the bass seem a little more detailed.
Before I put the woofer back I also added a little more damping on the back wall opposite the woofer to try it out now when the panels are dead. I am not 100% sure if I will keep it but it makes the sound a little more controlled, but maybe too controlled to make it boring? I will keep this for now and listen a long time before I decide if it will stay.
Making this speaker, I have learned alot and it has certainly been fun!
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Old 12th June 2012, 10:34 AM   #487
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Starre can you post some photos of the mods you did?
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Old 12th June 2012, 10:55 AM   #488
Starre is offline Starre  Sweden
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Sorry I have none, but I can explain where it is. If you look at the woofer from the front, the bracing is in line with the two bottom screws of it (one step up from the single screw 6 o´clock so to speak), that would be four and eight o´clock. It is about 2cm from the magnet of the woofer in depth, almost at the middle of the panel. the 2 rods are placed behind eachother seen from the woofer into the cabinet.
This worked for my cabinet, but depending on where the other 2 braces are placed, just put it where it makes the sides as stiff as possible, you can knock on the panel and listen where it is best placed.

Last edited by Starre; 12th June 2012 at 11:00 AM.
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Old 12th June 2012, 03:00 PM   #489
Salas is offline Salas  Greece
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A stethoscope is very nice for examining panel resonances. Not like an attached accelerometer to collect data, but as empirical method is OK.
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Old 12th June 2012, 04:19 PM   #490
Starre is offline Starre  Sweden
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Yes Salas, that must be a good way doing it. You could go on and on making improvements.
I am just happy that I got rid of the worst resonances, and when it comes to bracing this will do for my demands.
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