'Home built Full range open baffle speakers with Plessey by RJV of New Zealand' 'A user-submitted image gallery that showcases some of the best DIY hi-fi projects from around the world.' 'Home built Full range open baffle speakers with Plessey C8OX by RJV of New Zealand' See more. Is the choice of driver for open baffle design so critical? A lot of the vintage full-range drivers that were used for things like radio consoles and such are great candidates for open baffle. Here is a list of drivers.
Those telefunkens are very similar to the Isophons I run in an open baffle. Indeed they do sound fantastic all by themselves. Be careful as they are really sensitive and should play loud with less than 5watts of power - don't blow them with your monster amp.
Start with the tweeter, I advice getting a pair of the Isophon HM10's which can be had for about $35 off ebay. I am using a series cap of 0.8uf for crossover - no padding necessary and they will be rolled in at around 10khz. Try different cap values until it sounds right. You may need to experiment with series padding resistors (1-4ohm to start with) but this will alter the crossover frequency so its a matter of trial and error till you get it right.
The bass is a little more complex since you need an inductor to do the crossover and it difficult to know the appropriate value until you start experimenting - and they are expensive. I advice looking into aperiodic loading (leaking sealed box) for the bass bin as it avoids the need for a pair of 12-15 inch bass drivers per baffle which is what it takes to run them open baffle.
Shoog
Start with the tweeter, I advice getting a pair of the Isophon HM10's which can be had for about $35 off ebay. I am using a series cap of 0.8uf for crossover - no padding necessary and they will be rolled in at around 10khz. Try different cap values until it sounds right. You may need to experiment with series padding resistors (1-4ohm to start with) but this will alter the crossover frequency so its a matter of trial and error till you get it right.
The bass is a little more complex since you need an inductor to do the crossover and it difficult to know the appropriate value until you start experimenting - and they are expensive. I advice looking into aperiodic loading (leaking sealed box) for the bass bin as it avoids the need for a pair of 12-15 inch bass drivers per baffle which is what it takes to run them open baffle.
Shoog