![]() ![]() I haven't tried them, but you can get some that plug in between the TT interconnect and the reciever for not much money. I would get a true rumble filter the cuts below 20hz. But, with that you will be loosing some musical content (the bass). You could try a different cartridge combo to see if it is less prone to the resonant frequency your current combo is generating.Īs stated earlier, a "low filter" cuts frequencies below about 50hz. You would have to get the TT pretty far away from the speakers since it is airborne low frequency that is doing this. When volume is cranked that super low frequency is exciting the arm and setting up a feedback loop. Tbone, the JBL amp has its own low-pass filter built into the amp. Plug into Phono input of preamp and plug turntable leads into back of filter. The fact that it happens more at the leading edge of the record makes sense since any slight warpage is exaggerated further from the spindle. Made for phono preamplifiers with 47Kohm input impedance (MM typical) Allows direct connection of any phono cartridge into typical MM phono preamp for effective elimination of subsonic noise. ![]() That will not be affected by turntable isolation since it is being generated within the turntable. Fitted with 1 x XLR inline jack and 1 x 6.3 mm mono plug. Excessive sub-sonic content in the signal would cause woofer 'pumping' and use up amplifier power. The 20Hz cut would serve as a 'rumble filter' built in. That tells me you have "rumble" going on. Fixed subsonic filter (25 Hz), gain control and variable active lowpass. I dont know if any modern pre-amps use it, but one varation of the RIAA equalization has a built in sub 20 Hz subsonic filter. ![]()
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