Guest monkamonk2001 Posted May 9, 2009 Report Share Posted May 9, 2009 I recently acquired the four woofers and two tweeters as used in the A-50 in two "really" home-made sealed boxes of about 40 litres (1.4 cuft) for A$10 /pr at my local salvo store. Their XO was a first-order on the tweeter with series C and series/parallel Rs actually labelled "SEAS". The arrangement sounded OK, but I suspect the original design of the A-50 might be better. The pair of boxes lacked the "punch" that some people have used to describe the bass and low mids of the original A-50. I have found the **outside** dimensions of the original boxes (28"x21.5"x10"). Three things I can't seem to find exactly are the dimensions/design of front baffle layout, the internal aperiodic vent or a XO schematic. I did find the A-50 XO on Planet 10 site, but also found a reference elsewhere that this could be slightly wrong. Someone suggested that 10R resistor should be in parallel with tweeter to form an Lpad. see attached .gif (Thanks to Dave Dlugos of Planet 10-hope it's alright to post this pic)I also need to know thickness of original cabinets (3/4 chipboard??) or enclosure volume as i plan to make thicker walls and perhaps some bracing front-to-rear and side-to-side.Also thought of making them as towers to avoid separate stands. Can anyone supply box plans and definitive XO schematic? Is there any advantage to making boxes bigger than original design? Or has anyone used these SEAS drivers in any other configuration eg d'appolito with tweeter between two mid-basses? Any suggestions for improvements on the original design would be appreciated. Please don't shoot me for posting such heresies in the Classic Dyanaco forum ;-) regardsOzziozzi;)I don't suppose it has occurred to any owner of the A50 to just pull a woofer and measure the aperiodic vent between the two chambers? There are quite a few people that would be interested and very appreciative to know what those dimensions are. Thanx..... Link to comment Share on other sites More sharing options...
dynaco_dan Posted April 6, 2012 Report Share Posted April 6, 2012 Hi thereI took both of my rescued A-50's outside to clean up last week.I took some photos and will post them and complete my write-up soon.1. removed 99% of the black paint from the side panels.2. I measured drivers, front and other outside measurements.3. I took photos of before and after.4. first cabinet has 99% mint walnut veneer.5. second cabinet is like from another planet, terrible shape, paint hides lots of sins.6. about one hour each so far.20120410 addedFunny thing is that after all I've read about the A-50's being floorstanding speakers because of their size and weight, my cabinets have the recesses and wall mounting brackets attached.I tried to post a few photos and was unsuccessful. Link to comment Share on other sites More sharing options...
Istvan.Gabor Posted January 24, 2017 Report Share Posted January 24, 2017 Hy everyone, i want to build a pair A50 I have a set of speaker kit for dynaco A50 (4 pieces of 25TV-EW 16Ohm and 2 pieces of H87).Does anyone know the exact size of the internal gap on the separating plate? (I know the external dimensions of box) Thank you any help! Link to comment Share on other sites More sharing options...
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