Quote:
grapenuts wrote:
 Jon, you use much higher? then again you are actively bi-amping and using your own external xover. with the internals, I don't like the sound of the logans with an xover at 150 or even 120. I find it best right around THX give or take 10hz. If it's a hybrid, it can handle the lower duty I would think due to allowing the woofer to take on the lower duty. a straight stat panel is a different story though. I've read your design on your clxcenter build and it looks great! excellent job. I deal with the rear wave of my Ascent i's by absorbing a good portion of it but not killing it all together. high order frequencies are absorbed and it seems to do the trick nicely. |
Grapenuts, I use the following crossover points for the Monoliths:
Panel to Monolith woofer (
aftermarket mid-bass capable driver) is at 315Hz
Woofer to IB Sub is at 60Hz
If using the stock hybrid system crossover, you pretty much can only pick the transition to the sub x-over. So 80 to 100Hz is fine for most. Some could be crossed over lower (Summits) but still no lower than 40hz.
If going totally active like I did, you should never cross over from the panel below 200, even for the big Monoliths. SL3 or Sequel type panels should cross over closer to 400Hz based on my metrics and resulting designs.
Regarding rear wave damping, be careful to use broadband absorption. As only absorbing the extreme highs or even upper mids on up, will not yield positive results at all.
The best results come when absorbing from 200 or 300hz on up, the lower you can go, the better.
That requires treatments that are 3 or more inches thick. If you are using 2" foam, or some other thin treatment stuck to the wall, that is not the right type to have behind the speakers.
Also, beware of treatments that include a limp mass absorber (typically a plastic film) embedded in them, as the reflective properties of the plastic are also negative. The recommended class of device to put *behind* an electrostat is something like the
RealTraps MiniTrap HF (special note to the HF part, as it’s the ‘HighFrequency’ absorber version that will not reflect the highs).
Place this offset 2” from the wall, and least 13” or more from the back of the panel for best results.