Dipoles interact with the room differently from monopoles, and have different setup requirements for good performance. Briefly, dipole bass is smoother in-room than monopole bass, but you don't want the reflected backwave energy arriving at the listening position too soon. I suggest about 5 feet between the speakers and the wall behind them.
Also, with a hybrid electrostat, the line-source-approximating panel will have different radiation characteristics than the point-source-approximating woofer. The sound pressure level will literally fall off more rapidly with distance from the woofer than from the panel (anechoically, 6 dB falloff per doubling of distance for a point source vs 3 dB per doubling of distance for a line source). In a long room like you have with hybrid electrostats at one end, the relative balance between woofer and panel will change by about 4 dB as you go from a fairly close listening position back to the far end of the room.
I used to have a room somewhat similar to yours (mine was 31 feet long by 13 feet wide by 9 feet tall), and large fullrange electrostats worked well in it. That 4 dB variation with distance is what I measured in that room with a hybrid electrostat. I think that big Maggies would be a better choice for your room than a hybrid electrostat.
In my experience, loudspeakers with fairly uniform, preferably not-too-wide radiation patterns are a good choice for problematic rooms. Some dipoles fit this description, as do some monopoles.
Duke
dealer/manufacturer
Also, with a hybrid electrostat, the line-source-approximating panel will have different radiation characteristics than the point-source-approximating woofer. The sound pressure level will literally fall off more rapidly with distance from the woofer than from the panel (anechoically, 6 dB falloff per doubling of distance for a point source vs 3 dB per doubling of distance for a line source). In a long room like you have with hybrid electrostats at one end, the relative balance between woofer and panel will change by about 4 dB as you go from a fairly close listening position back to the far end of the room.
I used to have a room somewhat similar to yours (mine was 31 feet long by 13 feet wide by 9 feet tall), and large fullrange electrostats worked well in it. That 4 dB variation with distance is what I measured in that room with a hybrid electrostat. I think that big Maggies would be a better choice for your room than a hybrid electrostat.
In my experience, loudspeakers with fairly uniform, preferably not-too-wide radiation patterns are a good choice for problematic rooms. Some dipoles fit this description, as do some monopoles.
Duke
dealer/manufacturer