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Hi Everyone. Sorry I am a bit late responding to your kind comments but I have been out of the country for a few days. Mark, The curve was made using thin ply laminated over a former using glue and clamps to hold it in place. The former was cut out from ply using the curve rebate from the CAD drawings. We cut a double length so we could provide two flares from one section by cutting them in half and then cutting the angles for connecting to the front baffle and the rear baffles. There is a 5mm rebate cut to locate the centre box sections which are made up of the two curves and the front and rear baffles. I think this is what you saw as an additional thin ply section inside the box. The foam curve sections were cut from the CAD drawing using a fairly hi tech CNC machine. The people cutting the wood and foam usually cut out complex foam sections and composite parts for the aerospace industry. This is a bit of an experiment and the back panel has rebates to accept the glued in foam sections. I built this one box to assess the best way to put it together and make any alterations to the drawings as necessary. I ended up assembling the whole box and fitting the rear panel last. i have not decided if this is the best approach. Any comments will be gratefully accepted. I have also fitted some sound deadening material to the inside of the curves and the back panels. the sort of stuff the auto industry use to stop resonances in metal panels. i have yet to ascertain if this will make any difference. We are planning to test the box in the near future and as soon as I have any results I will pot them here. Once i have ironed out the bugs in the drawings I will also make them available if anyone wants them as long as Peter is happy with this. I am no CAD expert so you may have to bear with me. As far as actually using the boxes, we are really pleased with the sound, very clear and excellent definition between instruments, small changes to system EQ are immediately recognisable and they remain clear and well defined as SPL increases. I think that some work needs to be done at the Sub/Mid Top crossover point but that is a small problem problem unique to our system. Using the Lake has made tuning the box fairly straightforward and I am hoping that when we get in the anechoic chamber that there will be some improvement over the first prototype which will make all the buggering about with the curve worth while:razz:. I include a couple of photos of the curve and rebate incase you are interested. Thanks to everyone for their kind comments, I can assure you that I am no carpentry guru and it has taken a great deal of time and many mistakes to get this far. Thanks to Peter for all his helpful suggestions.[ATTACH]203874[/ATTACH][ATTACH]203875[/ATTACH]
Hi Everyone. Sorry I am a bit late responding to your kind comments but I have been out of the country for a few days. Mark, The curve was made using thin ply laminated over a former using glue and clamps to hold it in place. The former was cut out from ply using the curve rebate from the CAD drawings. We cut a double length so we could provide two flares from one section by cutting them in half and then cutting the angles for connecting to the front baffle and the rear baffles. There is a 5mm rebate cut to locate the centre box sections which are made up of the two curves and the front and rear baffles. I think this is what you saw as an additional thin ply section inside the box. The foam curve sections were cut from the CAD drawing using a fairly hi tech CNC machine. The people cutting the wood and foam usually cut out complex foam sections and composite parts for the aerospace industry. This is a bit of an experiment and the back panel has rebates to accept the glued in foam sections. I built this one box to assess the best way to put it together and make any alterations to the drawings as necessary. I ended up assembling the whole box and fitting the rear panel last. i have not decided if this is the best approach. Any comments will be gratefully accepted. I have also fitted some sound deadening material to the inside of the curves and the back panels. the sort of stuff the auto industry use to stop resonances in metal panels. i have yet to ascertain if this will make any difference. We are planning to test the box in the near future and as soon as I have any results I will pot them here. Once i have ironed out the bugs in the drawings I will also make them available if anyone wants them as long as Peter is happy with this. I am no CAD expert so you may have to bear with me. As far as actually using the boxes, we are really pleased with the sound, very clear and excellent definition between instruments, small changes to system EQ are immediately recognisable and they remain clear and well defined as SPL increases. I think that some work needs to be done at the Sub/Mid Top crossover point but that is a small problem problem unique to our system. Using the Lake has made tuning the box fairly straightforward and I am hoping that when we get in the anechoic chamber that there will be some improvement over the first prototype which will make all the buggering about with the curve worth while:razz:. I include a couple of photos of the curve and rebate incase you are interested. Thanks to everyone for their kind comments, I can assure you that I am no carpentry guru and it has taken a great deal of time and many mistakes to get this far. Thanks to Peter for all his helpful suggestions.
[ATTACH]203874[/ATTACH][ATTACH]203875[/ATTACH]
