Audiotomb, I responded to this on the other thread. I run the Triplanar and ZYX and have used a variety of speakers, a good number of them ported. In addition, our preamp has phono bandwidth flat to 2 Hz.
We get no pumping. IOW the bandwidth the of the preamp is not an issue; if a low frequency rolloff fixes the problem then you have a set up problem.
Remember how I commented about using different weights? With the Triplanar you can use a lighter weight further from the arm, thus increasing the effective mass, or a heavier one that is closer to the bearings, thus reducing the effective mass.
The other possibility is that all your LPs are really badly warped, but I don't buy that.
You could also have a low frequency resonance in the room that is interacting with the phono. I don't recall you mentioning the stand that the table is on- that can have a **huge** effect. We use a Sound Anchors stand that is custom built to accommodate our equipment platforms, one of which is beneath the 'table (which has no suspension). The stand is perched on a set of Aurios Pro bearings. On this set up the 'table is immune to any playback volume- I do not get pumping even at sound pressures of +105db.
We get no pumping. IOW the bandwidth the of the preamp is not an issue; if a low frequency rolloff fixes the problem then you have a set up problem.
Remember how I commented about using different weights? With the Triplanar you can use a lighter weight further from the arm, thus increasing the effective mass, or a heavier one that is closer to the bearings, thus reducing the effective mass.
The other possibility is that all your LPs are really badly warped, but I don't buy that.
You could also have a low frequency resonance in the room that is interacting with the phono. I don't recall you mentioning the stand that the table is on- that can have a **huge** effect. We use a Sound Anchors stand that is custom built to accommodate our equipment platforms, one of which is beneath the 'table (which has no suspension). The stand is perched on a set of Aurios Pro bearings. On this set up the 'table is immune to any playback volume- I do not get pumping even at sound pressures of +105db.