Hello Christian.
The proplex does not show any peaks on my frequency response plot, but that does not mean that they are not there hidden below the frequancy response plot level.
My 3mm ply panels suffered the peaks from the central coil area which I used various methods to reduce or remove the problem.
Using foam to damp the peak did very little to remove the peak, so I filled the 2mm hole with blu-tack ( previously I had used blobs of blu-tack to damp the coil area, but I did not like the sound of added mass), I seem to remember this worked quite well, but I can't remember posting these results?
Heavy ply panels have not been a priority for me.
The strip of paper technique did cure the peak problem in the central coil area, but not necessarily on the panel surface.
I finally decided that I preferred to use a polythene sheet membrane as a passive drive mechanism, this solved most of the problems with 3mm ply and come to that the proplex panel as well.
I did not Finnish these experiments, and left it there for others to experiment with ,if they desired.
Steve.
The proplex does not show any peaks on my frequency response plot, but that does not mean that they are not there hidden below the frequancy response plot level.
My 3mm ply panels suffered the peaks from the central coil area which I used various methods to reduce or remove the problem.
Using foam to damp the peak did very little to remove the peak, so I filled the 2mm hole with blu-tack ( previously I had used blobs of blu-tack to damp the coil area, but I did not like the sound of added mass), I seem to remember this worked quite well, but I can't remember posting these results?
Heavy ply panels have not been a priority for me.
The strip of paper technique did cure the peak problem in the central coil area, but not necessarily on the panel surface.
I finally decided that I preferred to use a polythene sheet membrane as a passive drive mechanism, this solved most of the problems with 3mm ply and come to that the proplex panel as well.
I did not Finnish these experiments, and left it there for others to experiment with ,if they desired.
Steve.
Hans,
I ordered a t-racks DPS 4x4 mini, thanks for the suggestion. Had to pay 55% import tax, but did it anyway. That s**ks.
I didn't order any new amps yet. I'd like to just play around with the dsp for now. But if I do get some amps I'm leaning toward a pair of the Fosi V3 amps, with the 48/5 power supply.
Thanks to all for their suggestions.
Eric