I own Jamo R909 last 4 years and I try them with lot of different electronic and compare with other speakers in same room. I use to own B&W N802 and when I change listening room unfortunately most speakers interact badly in bas region. I even tried B&W 801D and discover trough Quad that dipole work better.
Since then I`m working on my system to get best of R909.
First, it is true that Jamo measure flat (I can post it),
but in the same time despite being dipole it is very uncommon design. Bas is onored with articulation and slam with natural decay, but cant match control of big B&W.
I my room (7x5m) goes flat to 25Hz. I tried reinforced firs octave with Velodyne DD-18 with no true success.
Seas bas-mid is crossed very low (high pass filter is set 6dB/okt below 200Hz) and low quality Solen 80uF cap compromise midrange dynamics. Still mids sounds clear with good details. Again, tweeter is crossed VERY low (2kHz - 18dB/okt) and while this gives nice transition between mid and high (optimal polar characteristic) Revelator tweeter needs quality source and amplification to preserve top octave.
Generally, sound is timbarly correct, stage is little laid back with good width and different depth (some say phase correct, but I found some speakers better to my taste) and average focus. In comparation Avangarde Uno Nano was more dynamic and live, but Jamo has top-to-bottom more coherent.
In my system there are 1.3m behind front wall, 1.2m from rear wall and 2.5m in between. I`m sitting 3.5m away and rear wall is 2m behind listening position.
I drive them with Pass Labs X250.5 amp, trough Sovter transformer passive pre-amp and source is Teac VRDS25 CD player. I`m planning to upgrade to Berkley Alpha DAC.
Cables are Atlas Mavros, Nordost Tyr and WireWorld Eclipse.
I hope this will help...
Since then I`m working on my system to get best of R909.
First, it is true that Jamo measure flat (I can post it),
but in the same time despite being dipole it is very uncommon design. Bas is onored with articulation and slam with natural decay, but cant match control of big B&W.
I my room (7x5m) goes flat to 25Hz. I tried reinforced firs octave with Velodyne DD-18 with no true success.
Seas bas-mid is crossed very low (high pass filter is set 6dB/okt below 200Hz) and low quality Solen 80uF cap compromise midrange dynamics. Still mids sounds clear with good details. Again, tweeter is crossed VERY low (2kHz - 18dB/okt) and while this gives nice transition between mid and high (optimal polar characteristic) Revelator tweeter needs quality source and amplification to preserve top octave.
Generally, sound is timbarly correct, stage is little laid back with good width and different depth (some say phase correct, but I found some speakers better to my taste) and average focus. In comparation Avangarde Uno Nano was more dynamic and live, but Jamo has top-to-bottom more coherent.
In my system there are 1.3m behind front wall, 1.2m from rear wall and 2.5m in between. I`m sitting 3.5m away and rear wall is 2m behind listening position.
I drive them with Pass Labs X250.5 amp, trough Sovter transformer passive pre-amp and source is Teac VRDS25 CD player. I`m planning to upgrade to Berkley Alpha DAC.
Cables are Atlas Mavros, Nordost Tyr and WireWorld Eclipse.
I hope this will help...