Hi Kodomo,
Please could you share some more details about your new bass solution - sounds very interesting. How is it sounding?
They are triple 12" GR-Research SW-12-16fr servo woofers in open baffle H frames powered by their propriety amps (balanced versions). It is fairly early to reach to conclusions but I can start by telling you what I have measured. The ob servo bass system is digging deeper and have a more linear response than my dual bass reflex and tapped horns. Maybe having one less channel helped too. I use a second order filter on the lower knee of my midbass horn and second order on the upper knee of the ob bass system and they cross at 110hz. I physically moved the bass system to be in phase with the rest of the horns. So the phase/delay is set at 0 on the amps. I did this via measuring.
Cool. I’d try to pull them forward a little so they don’t load the corner as much. It looks like there is some room.
Well, they are about 4 feet away from the structural wall. The wooden panel false wall that is behind them is a 2 dimensional binary diffuser with about 12inches of absorbent material behind.
In fact it looks as though they could move right behind the lip of the main speakers. They don't need to be in line with the horn drivers or facing the exact same direction since they aren't playing anywhere near 250hz. Just the phase needs to be set at a good place, and not have big boost or suck out at wrong frequency from approximation of location. They'll sound their best when phase and FR are best, all that other "alignment" stuff won't do anything as the frequencies are too long and omni-directional.
I'm liking the look of the room as well, btw.
They sound and measure different when they are completely blocked by the midbass horns lips. It was very easy to put them in phase, I was suprised. I physically put the center driver at the same distance from my listening point to start with and from there it was just some small movements that made small improvements. They are in phase and cross to midbass beautifully, there are no large dips in response too, except for an -3db dip at 40hz which is quite alright by me. I am using 20hz extension setting with high damping as of now. High damping setting matches the midbass horn the best.
My first impressions are positive, I thought there would be less impact with the ob system and I was completely wrong. It has more impact than my previous solution. It integrates well with the horns and the room. I will have to listen much more to talk about their tonality.