This work is devoted to improving technology and conducting microseismic monitoring of mineral deposits by choosing the optimal low-cost seismic equipment. During the last few years much progress has been made in the development and production of seismic exploration geophones. There are modifications with natural frequency values 4.5-5 Hz and an increased sensitivity of about 100 V/m/s. The problems that are solved by monitoring of weak local seismicity (where it is sufficient to ensure the registration of frequencies above 0.5-1 Hz), become important. However, these values are still below the operating frequency band of a standard geophone. In this paper, we consider low-frequency deconvolution method to expand operating frequency band of geophones. Then, authors discussed the need for careful choice of low-noise digitizer. It is proposed a method for estimation of digitizer's self noises - calculation of Power Spectral Dencity. The using of cheaper equipment (compared with seismological devices) will help significantly reduce the cost of microseismic monitoring and increase the number of observation points.