I'm going to design and 3d print 3-way speakers to install on the sides of a TV.
Either active or passive crossovers. I have the tools to measure and make both.
The TV is 90degree wall mounted at the end of an alcove, which is about 2m wide and I'll sit on a bed, close to a wall, about 2m from the TV/speakers.
The height between the bed and ceiling is about 1.5m.
I currently have some spare SB19ST tweeters, a pair of Omnes SW 5.01 woofers and for midranges I have:
2x Tang Band W2-2243S
4x Peerless TC9FD00
4x Peerless TC6FC02
4x Peerless TC6FD00
to choose from.
I'm currently thinking of designing a waveguide for the sb19st and maybe for the mids.
Then I'm leaning towards an MTM with the TC6FC02.
And I've already designed and simulated the base for a T-line for the SW 5.01:
The reason I'm thinking of 3-way is because the SW5.01 is a pretty heavy midbass with a lot of xmax, so I don't know if it could cross over well with the tweeter.
Now my biggest concern is with the waveguide/horn for the tweeter and the placement of the midranges, to get the best sound in the small alcove.
I know it's not going to be perfect in any way, but I'm thinking I should try and make the speakers have a narrower directivity, to not get as many reflections.
I know MTM makes the vertical dispersion narrower, but I'd also want to make the horizontal dispersion narrower.
Should I just place 4x mids in a cross pattern?
Or should I make a unity horn with the mids?
Like the UICW: https://www.diyaudio.com/community/threads/unitized-image-control-waveguide.319698/
I'd use this one, but it's just a little large and I don't see anyone measuring both the vertical and horizontal dispersions, and I think it plays too wide.
Or should I just give up and live with the reflections?
I have a 32x32cm 3D printer so the design possibilities are pretty limitless.
Either active or passive crossovers. I have the tools to measure and make both.
The TV is 90degree wall mounted at the end of an alcove, which is about 2m wide and I'll sit on a bed, close to a wall, about 2m from the TV/speakers.
The height between the bed and ceiling is about 1.5m.
I currently have some spare SB19ST tweeters, a pair of Omnes SW 5.01 woofers and for midranges I have:
2x Tang Band W2-2243S
4x Peerless TC9FD00
4x Peerless TC6FC02
4x Peerless TC6FD00
to choose from.
I'm currently thinking of designing a waveguide for the sb19st and maybe for the mids.
Then I'm leaning towards an MTM with the TC6FC02.
And I've already designed and simulated the base for a T-line for the SW 5.01:
The reason I'm thinking of 3-way is because the SW5.01 is a pretty heavy midbass with a lot of xmax, so I don't know if it could cross over well with the tweeter.
Now my biggest concern is with the waveguide/horn for the tweeter and the placement of the midranges, to get the best sound in the small alcove.
I know it's not going to be perfect in any way, but I'm thinking I should try and make the speakers have a narrower directivity, to not get as many reflections.
I know MTM makes the vertical dispersion narrower, but I'd also want to make the horizontal dispersion narrower.
Should I just place 4x mids in a cross pattern?
Or should I make a unity horn with the mids?
Like the UICW: https://www.diyaudio.com/community/threads/unitized-image-control-waveguide.319698/
I'd use this one, but it's just a little large and I don't see anyone measuring both the vertical and horizontal dispersions, and I think it plays too wide.
Or should I just give up and live with the reflections?
I have a 32x32cm 3D printer so the design possibilities are pretty limitless.
Or would a speaker with bigger drivers from the get go be better for this, to lessen reflections?
I also have an extra pair of Faitalpro 8FE200 mids and PRV D280TI compression drivers that I can make horns for.
This would lessen the bass extension, but might be better suited for the space although the sensitivity is not needed.
I also have an extra pair of Faitalpro 8FE200 mids and PRV D280TI compression drivers that I can make horns for.
This would lessen the bass extension, but might be better suited for the space although the sensitivity is not needed.
FWIW, the pioneer's focused on three things for sound systems, efficiency, which included polar response and high speech intelligibility in the 250-2500 Hz analog BW and later the 300-3 kHz digital BW, so in room we ideally want zero reflections between the speakers and the listening area, i.e. behind our ears, and a diffuse sound field behind it and speaker system wise a ~full range MEH + separate multiple subwoofer system ala Dr. Geddes is currently your best option if its size/cost isn't an issue.
Size and cost are an issue, but it seems I already have decent drivers to make this.
If I design and print a MEH for the SB19 and the TC6 or TC9 mids, according to the measurements from the UICW project, I should be able to get it to play down to nearly 300Hz. But how large should it be to have controlled directivity down that low?
Then just use the 5" T-lines for 40-300Hz and I have an 8" sub that plays 25-40Hz.
I haven't invested nearly enough time on understanding MEHs yet, but it seems like It would need to be "pretty" big to include the 5".
And I don't know what characteristics the midbass should have in order to work in the MEH?
As for the rear reflections, I do have a head board behind me, but I could also maybe make acoustic panels as thick as the head board (5-10cm) and cover the wall behind me with them.
It would start to be an investment compared to the rest of the project, but would it be worth it to cover the side walls as well with acoustic panels?