I have decided to make an OB loudspeaker after having listened to this experimental setup.
This is inspired by Simon's OB with Eminence and Skytronic drivers.
My project will use an Eminence PSD2002 driver with a 90 degrees OS waveguide as tweeter. I had the driver already, and it was easy to remove the backchamber to make it dipole.
The mid will be an Eminence Beta 8a and the woofer a Fostex FW405.
The Beta 8a will cover as much as possible and hopefully run wide open without any crossover.
The tweeter will use a single cap and a lpad to bring the level down, to match the mid.
The Fostex will be in a H-baffle with a separate woofer amp and electronic crossover.
I have played around today and can see I need to have the front of the Beta 8a, about 7cm back compared to the mouth of the waveguide. This is need to time align the drivers.
I can do this by mounting the horn flush with the baffle, and then mount the mid on an extra spacer behind the baffle, with a 90 degrees flare out to minimise reflections.
After reading some info about OB's I don't know how wide I should make the baffle.
The H-baffle will be about 45cm wide, and I thought about a 40cm wide baffle for the mid to help it go down lower, but I don't know if it is to wide.
I've also considered to make the baffle ready for a second mid like the Bastanis loudspeaker.
This would mean the tweeter will be lower than the mid, is this ok?
Should the drivers be offset on the baffle, or placed in line ?
Thx in advance, all help appreciated.
An externally hosted image should be here but it was not working when we last tested it.
This is inspired by Simon's OB with Eminence and Skytronic drivers.
My project will use an Eminence PSD2002 driver with a 90 degrees OS waveguide as tweeter. I had the driver already, and it was easy to remove the backchamber to make it dipole.
The mid will be an Eminence Beta 8a and the woofer a Fostex FW405.
The Beta 8a will cover as much as possible and hopefully run wide open without any crossover.
The tweeter will use a single cap and a lpad to bring the level down, to match the mid.
The Fostex will be in a H-baffle with a separate woofer amp and electronic crossover.
I have played around today and can see I need to have the front of the Beta 8a, about 7cm back compared to the mouth of the waveguide. This is need to time align the drivers.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
I can do this by mounting the horn flush with the baffle, and then mount the mid on an extra spacer behind the baffle, with a 90 degrees flare out to minimise reflections.
After reading some info about OB's I don't know how wide I should make the baffle.
The H-baffle will be about 45cm wide, and I thought about a 40cm wide baffle for the mid to help it go down lower, but I don't know if it is to wide.
I've also considered to make the baffle ready for a second mid like the Bastanis loudspeaker.
This would mean the tweeter will be lower than the mid, is this ok?
Should the drivers be offset on the baffle, or placed in line ?
Thx in advance, all help appreciated.
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