I’d be using some of Earl Geddes and Jack Bouska ideas and some of my own.
The purpose is to use high quality drivers in cost effective, stiff, virtually noiseless enclosures that don’t look too butt ugly. Maybe just functional ugly.
Using the 2 B&C drivers and multiple cheap sealed subs is the way I’m going.
Drivers:
B&C DE 250 (Gedlee) I like it’s fairly flat FR.
B&C 10PS26 (Gedlee) I like it’s fairly flat FR.
10” DDS eng 1-90 CD Oblate Spheroid waveguide. Not as good as a Gedlee WG, especially around the driver WG interface. Where the DDS contacts the round enclosure, I’ll trim the DDS to curve around the MDF. Placing some wool or foam to reduce reflections back into the WG and edge diffractions.
Foam roundover taped around the DDS WG. Using $1 3” diameter swim Noodle for kids.
Sealed enclosure will be a 10” sonotube inside a 12” sonotube for 10” mid/bass driver (Like Bouska photo below). No roundover needed for frequencies used. The air space between sonotubes will have poly fill and should greatly reduce sound from the enclosure to the room. The outer tubes will be wrapped in some type of black or white contact paper to look a little nicer. Maybe just painting it.
Enclosure length TBD because I don’t know if I want to have it for 100hz or 80hz yet.
Open celled foam filling interior behind mid/bass.
Ends of mid/bass cylinder enclosures to be routered from 1” MDF. Xover and 100W Icepower amp to be mounted on the back outside of the rear MDF.
The MDF end caps will not be round like Bouska but have a flat bottom to sit on speaker stands (see rough illustration)
DDS to sit on top of mid/bass enclosure with driver in the open. Mounting hardware TBD. Or use a 10” sonotube ( bottom 10% cut off to sit on top of mid/bass tube) on the DDS. Then the speaker would look like a tube on a tube. Maybe use some 30PPI foam in the mouth of the DDS. Maybe not.
Xover to start: around 1,500hz no EQ 1st order (Bouska).
Xover later (maybe): with a Behringer DCX 8th order with EQ. (Bouska).
Perfect? Not a chance. I’ll be lucky to get 75-80% of the sounds Bouska and Geddes get. The pair should cost less than half the price of a Gedlee DIY Nathan kit ($1,000).
I’m sure I’ve left out a few details but it’s just an idea for now.
What would you change?
The purpose is to use high quality drivers in cost effective, stiff, virtually noiseless enclosures that don’t look too butt ugly. Maybe just functional ugly.
Using the 2 B&C drivers and multiple cheap sealed subs is the way I’m going.
Drivers:
B&C DE 250 (Gedlee) I like it’s fairly flat FR.
B&C 10PS26 (Gedlee) I like it’s fairly flat FR.
10” DDS eng 1-90 CD Oblate Spheroid waveguide. Not as good as a Gedlee WG, especially around the driver WG interface. Where the DDS contacts the round enclosure, I’ll trim the DDS to curve around the MDF. Placing some wool or foam to reduce reflections back into the WG and edge diffractions.
Foam roundover taped around the DDS WG. Using $1 3” diameter swim Noodle for kids.
Sealed enclosure will be a 10” sonotube inside a 12” sonotube for 10” mid/bass driver (Like Bouska photo below). No roundover needed for frequencies used. The air space between sonotubes will have poly fill and should greatly reduce sound from the enclosure to the room. The outer tubes will be wrapped in some type of black or white contact paper to look a little nicer. Maybe just painting it.
Enclosure length TBD because I don’t know if I want to have it for 100hz or 80hz yet.
Open celled foam filling interior behind mid/bass.
Ends of mid/bass cylinder enclosures to be routered from 1” MDF. Xover and 100W Icepower amp to be mounted on the back outside of the rear MDF.
The MDF end caps will not be round like Bouska but have a flat bottom to sit on speaker stands (see rough illustration)
DDS to sit on top of mid/bass enclosure with driver in the open. Mounting hardware TBD. Or use a 10” sonotube ( bottom 10% cut off to sit on top of mid/bass tube) on the DDS. Then the speaker would look like a tube on a tube. Maybe use some 30PPI foam in the mouth of the DDS. Maybe not.
Xover to start: around 1,500hz no EQ 1st order (Bouska).
Xover later (maybe): with a Behringer DCX 8th order with EQ. (Bouska).
Perfect? Not a chance. I’ll be lucky to get 75-80% of the sounds Bouska and Geddes get. The pair should cost less than half the price of a Gedlee DIY Nathan kit ($1,000).
I’m sure I’ve left out a few details but it’s just an idea for now.
What would you change?