Answer:
The main issue associated with band pass filter created by combining directly a high-pass and a low-pass filter is that the gain is always less than unity and this makes the load impedance to have impact on the filters characteristics
Step-by-step explanation:
Low-Pass Filters: filter out all frequency above the cut-off frequency and passes all frequencies below the cut-off frequency.
High-Pass Filters: likewise, high-pass filter attenuate all frequency below the cut-off frequency and passes all frequencies above the cut-off frequency.
Band-pass filter : passes frequency between a range ,and attenuate all frequencies outside that particular range.
Combining directly a high-pass and low-pass filter forms a passive band-pass filter, the main demerit of passive filters is that the output signal's amplitude is usually less than that of the input signal. Hence , their gain is less than unity.