Rolls EQ570 4-Band Audio EqualizerThe Rolls Bellari EQ570 is a four band equalizer meant for home use. It's particularly suitable for ameliorating issues with inferior sounding records as you listen to them in headphones or through home speakers. Use this EQ with your phono preamp, CD player, phone, tablet, DAC, or other media player. Four bands of equalization are provided via four potentiometers. On the low 60 Hz and high 7. 5 kHz bands, you secure up to 12 dB of boost or