ROLLS Hum Eliminator ROLLS Hum Eliminator Item #: HE18 Available For Backorder $64.90 Qty: Backorder Add to WishlistAdded to Wishlist | Add to CompareAdded to Compare View full details Main Features Frequency response: 20Hz to 70 kHz +/- .5dB Distortion: < 0.005% THD @ 1 khz Crosstalk: > -97 dB Max source impedance: 1 K Ohm Min load impedance: 10 K Ohm Eliminates ground loop hum and buzz. Leaves signal grounds connected. Passive, the unit requires no power. Converts balanced lines to unbalanced lines and vice-versa. Adjusts signal voltages to match difference in ground potential.