<p>Delayed-rectifier voltage-gated K⁺ conductances (<i>I</i>_K) can confer band-pass properties to the membrane impedance gain function in the frequency domain, and shorten the duration of transient receptor potentials evoked by voltage-insensitive receptor currents in the time domain. Here, by investigating in silico the underlying mechanisms, we found that: 1. <i>I</i>_K activation rate was the major determinant of both the voltage response narrowing and the impedance gain peaking. Both effects were non-linear, voltage-dependent, with the maxima determined by <i>I</i>_K conductance and kinetics. 2. Analysis in the time domain revealed that for efficient modulation, the kinetics of <i>I</i>_K must correspond to that of the receptor current: slower-activating <i>I</i>_Ks more strongly narrowed voltage responses elicited by slower receptor currents than faster-activating <i>I</i>_Ks, and vice versa. 3. Two complementary mechanisms mediated the modulation: (1) voltage amplification at the onset of receptor current during a window of relatively high resistance due to delayed activation of <i>I</i>_K, and (2) attenuation of voltage response during its decay by excessive <i>I</i>_K due to its delayed deactivation. Consequently, the action of <i>I</i>_K caused a partial leftward shift of voltage waveform relative to the receptor current, resembling the effect of electrical inductance. 4. Voltage response narrowing was opposed by self-shunting of the depolarizing receptor current as it increased. Consequently, the increase in corner frequency due to <i>I</i>_K was limited to small voltage responses. Our results elucidate reciprocal relationships between the voltage response and <i>I</i>_K, and the conditions when <i>I</i>_K can confer band-pass properties to impedance gain function.</p>