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Multi-Way Conventional loudspeakers with crossovers

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Old 13th July 2012, 09:00 PM   #551
Salas is online now Salas  Greece
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Quote:
Originally Posted by Starre View Post
Some impressions: all together it is a step up in sound quality, that is clear to me. Middle range more clarity but with warmth, bass seem more robust. I also tried with the front panels on, and I like the bass support it gives so they will stay.
I can finally say the speakers are ready, I am very pleased and will enjoy my time with them. I have learned how cabinet rigidity is important, and how to achieve that in my own way. MDF is probably ok if you use solid wood for bracing, but next time I will use birch plywood. My original bracing was also made from MDF since that was what was available, but I can say now that it is not a good idea, use solid pine rod or something similar.
I send this to Salas to help him get cool in hot Athens....
Whoever is going to copy this speaker using MDF better follow your bracing guide, pictures tell the tale. The original cabinet is made out of different wood and bracing material. Your cab should be better controlled. Thanks for the ice cube, happy listening. A good project came to its full.
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Old 15th July 2012, 12:24 PM   #552
Starre is offline Starre  Sweden
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I will be happy to assist anyone building it. I have listened to some well known CDs and the speaker sounds great, I never heard my Revel Performa perform like this! Maybe you should start a business in speaker design, Salas .
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Old 15th July 2012, 12:28 PM   #553
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Starre how big is your space? Have you tried your speakers in smaller room?
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Old 15th July 2012, 12:35 PM   #554
Starre is offline Starre  Sweden
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My space is 28 square meter, no I have not tried it in smaller space but I think it will work good with at least 20.
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Old 15th July 2012, 12:49 PM   #555
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I would have build it by now if i had the space.Limited to 16 square meters ):
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Old 15th July 2012, 12:51 PM   #556
Starre is offline Starre  Sweden
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Ok Dufus, well it probably is possible with 16 too, but to get the full potential out of them a bigger room is better.
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Old 17th July 2012, 07:29 PM   #557
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Some bad news I'm afraid, I have noticed another box related problem. The backside opposite the woofer is making a lot of noise, it is obviously that infamous back-bounce pressure. I know understand why it is common to use shelf bracing since it gives more support for the panels. Is it common that speakers has this problem? Maybe if I glue a few rods at the back from side to side and also to the backpanel, it will help. Or I just need a birch plywood box after all.

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Old 17th July 2012, 07:43 PM   #558
Salas is online now Salas  Greece
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Its common that the back rattles more if not especially thick or reinforced, although most of its energy is radiated away from a front seated listener.
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Old 17th July 2012, 08:23 PM   #559
Starre is offline Starre  Sweden
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Ok Salas. It is mostly not hearable, but on some more demanding music it is. I will see later on if I want to fix it.
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Old 18th July 2012, 07:55 AM   #560
Starre is offline Starre  Sweden
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I will reinforce the back panel with some ribs or rod when I get my energy back, lol.
It is only the part behind the woofer that needs it, higher up and lower down it makes no sound. It is obvious now that if you want to be serious about this speaker and use MDF, you should do some serious bracing. Those drivers deserve it.
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