FIR Audio Genuine Leather Round Case for IEMs headphone XLR Negative feedback is used in

Negative feedback is used in amplifier circuits to compare the output signal with the input signal and correct errors

the JBL Tune Buds earbuds stream audio with low power consumption at high quality

Noble takes things to the next level with all aluminum shells for unparalleled rigidity to reduce unwanted sonic vibrations

The semi-open design at the rear cavity was refined through computer simulations to ensure air pressures at the front and rear cavities are balanced – resulting in larger soundstage

FIR Audio Genuine Leather Round Case for IEMs headphone XLR Negative feedback is used inBased on the carrying cases included with the Frontier IEMs but available in genuine leather for a luxurious feel.