Had an extra waveguide and DE250 lying around so decided to try running as a two way with the centre
from 700hz up with a 48db linear phase with the DEQX. So far really impressed! At least in my room
I'm getting alot more detail. I got the idea from reading about the OPSODIS technology and wanted
to build a whole rig. But I think just a setup like this might be sufficient. Im still in the honeymoon
phase with it, so maybe it gets annoying after a while, but enjoying ATM.
I think having the same directivity between the centre and side channels needs to match. But this setup
opens up a few more options. Such as running drivers that do upper mids better for the sides and
somethign with a really nice top end for the centre.
Anyone else played around with this?
from 700hz up with a 48db linear phase with the DEQX. So far really impressed! At least in my room
I'm getting alot more detail. I got the idea from reading about the OPSODIS technology and wanted
to build a whole rig. But I think just a setup like this might be sufficient. Im still in the honeymoon
phase with it, so maybe it gets annoying after a while, but enjoying ATM.
I think having the same directivity between the centre and side channels needs to match. But this setup
opens up a few more options. Such as running drivers that do upper mids better for the sides and
somethign with a really nice top end for the centre.
Anyone else played around with this?
Attachments
Do I understand this correctly?: the center channel reproduces everything from 0.7 kHz upwards, nothing below that?
Many greetings,
Michael
Many greetings,
Michael
THX certified is 80-20 kHz +/- 3 dB, the rest is routed to the subwoofer(s).
I have since moved the crossover up even further to 1200hz. It shouldnt work, but it does! I dont proclaim to understand any of the physics happening here but I have a suspicion: perhaps the sense of cohesion (I guess this would be lobing and combfiltering?) is more of a function of angle than absolute distance between drivers. I used this paper as a guide https://resource.isvr.soton.ac.uk/FDAG/VAP/pdf/OPSODIS.pdf
Of course I'm sure there is alot more happening in that technology than simple crossovers and phase shifting. I dont understand it so I just did my backwater version of crossing over at the frequency based on the angle in this chart: and letting DEQX figure out the phase. At 1200hz I guestimated the angle to the listening position from the side speakers is around 30 degrees. I think next I will try adding a couple subs at the sides and make a 3 way! Having all the high frequency information coming from a single point in space can sound pleasant. Its worth experimenting with IMO.
I am quickly realizing this setup offers some significant advantages. Using the 3rd de250, I get to keep the top end more within its linear range by crossing up at 1200hz (or even higher) , and then use the two abbeys on the sides for the 1000-1200 range (with a rolloff that goes higher). It got me thinking what would be possible splitting off the centre into two channels 5 degrees off center and running a ribbon supertweeter for the UHF. So far I would describe the soundstaging as putting yourself in the middle row. I think for lovers of live performance this setup is really good. The spacial cues of the venue are improved. The sacrifice is having the sense of being "in the middle of sound environment" decreased, and more of a sense of it happening in front of you. For people who easily get overwhelmed by stereo effects, they might actually like this setup much more.