When I lived in a different state, I got a very slow in and out movement of the woofer cones which was traced to the cables picking up radar from a nearby airport. When I used shielded speaker cables, the woofers stopped pumping and draining power from my amp.
Turntable rumble/Hum problem/s
Before outlining the problem, let me list the equipment involved -
Marantz PM-11S2 Int. amp with internal phono stage.
Denon DP-59L TT - Grado Prestige Series Cartridge.
Dynaudio Focus 140 speakers - Rel 305 sub.
Phonomena II phono preamp.
KAB Rumble Filter.
Now for the problem/s -
When utilizing the Marantz internal phono stage, there is TT rumble. I am pretty sure the rumble is a result of the table being too close to one of the speakers. However, the placement of the speakers/turntable cannot be changed.
The sound is great but there is constant in/out movement of the speaker's woofers. NO HUM problem though. The Marantz integrated does not have a HT pass through/processor loop; and, according to KAB, the filter cannot be used.
Using the Phonomena phono stage allows for the use of the KAB filter which eliminates the rumble but causes a low but audible hum when the arm comes into contact with the LP. The connections for this setup are TT to Phonomena inputs with proper grounding/phonomena outputs to KAB inputs/KAB outputs to line level amp input.
If I use the phonomena into amp line inputs witout the filter, the rumble is there as well as the hum.
Ideas and/or suggestions as to how to solve the problem are greatly appreciated. Tks.
Marantz PM-11S2 Int. amp with internal phono stage.
Denon DP-59L TT - Grado Prestige Series Cartridge.
Dynaudio Focus 140 speakers - Rel 305 sub.
Phonomena II phono preamp.
KAB Rumble Filter.
Now for the problem/s -
When utilizing the Marantz internal phono stage, there is TT rumble. I am pretty sure the rumble is a result of the table being too close to one of the speakers. However, the placement of the speakers/turntable cannot be changed.
The sound is great but there is constant in/out movement of the speaker's woofers. NO HUM problem though. The Marantz integrated does not have a HT pass through/processor loop; and, according to KAB, the filter cannot be used.
Using the Phonomena phono stage allows for the use of the KAB filter which eliminates the rumble but causes a low but audible hum when the arm comes into contact with the LP. The connections for this setup are TT to Phonomena inputs with proper grounding/phonomena outputs to KAB inputs/KAB outputs to line level amp input.
If I use the phonomena into amp line inputs witout the filter, the rumble is there as well as the hum.
Ideas and/or suggestions as to how to solve the problem are greatly appreciated. Tks.
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