Car subwoofer composition
Date:2022.12.27 |Author:Max lu|Vistors:121
Car subwoofer composition
Subwoofer circuit composition analysis, generally by the front stage amplification, low-pass filtering, phase adjustment, power amplification, protection and power supply and other parts.
As far as its function is concerned, the previous stage amplification is to further amplify the AV amplifier output superheavy bass signal to drive the power amplifier part of the full power output amplitude, because each brand of AV amplifier provides the superheavy bass signal voltage is not the same, generally ranging from 0.3-1 volts, so the former stage amplification is necessary, The former circuit also has an important role is to play the significance of isolation buffer, because the various brands of power amplifier output of the heavy bass signal differences, some manufacturers steal material in the design, resulting in the output of the internal resistance is very high, if the direct drive subwoofer power amplification unit, it may be very bad effect;
Low-pass filtering is a subwoofer circuit part of a more important unit, its role is to be mixed in the power amplifier output of the super-heavy bass signal above the low frequency signal further filter, the general design will be 80-180Hz(many high-end products will filter the low end of the cut-off frequency design into continuous adjustable), if belongs to a fixed frequency filter, Generally, the value is about 110-150Hz, too low speaker is easy to produce mixed sound drop, too high, easy to mix with human ear discernable music signals;
For each brand of AV power amplifier output of the overweight bass signal is reverse or positive phase is not unified provisions, therefore, phase adjustment is placed in the subwoofer according to the needs of the system connection will be subwoofer positive phase or reverse phase use, depending on the effect, is generally essential;
The power amplification unit is not wordy, is the core of the active subwoofer;
