2.1 Channel Systems Chip-Amp Power Amplifier TDA7240 Subwoofer and TDA1517 Satellite
The main problem with the design of the subwoofer woofer stereo amplifier with a total production, is that the signals from the left and right channels, sooner or later, are summarized. As a result of the addition only is the separation between channels is minimized and violates the idea of ??stereo systems satellite. The most effective method of summation today – active signal smesitelyami – filters with high input impedance, which is often used by field-effect transistors. To improve subsequent increase in the amplitude of the signal cascade.
I tried to do a different route – the most to weaken the signals from and to their addition, as late as possible before the signal with high sensitivity TDA 7240 – 46dB chip-amp. The second chip TDA 1517, serves as a medium-frequency driver.
I must say that the problem is not solved completely, the separation between channels is desirable to make more subjective listening showed a contraction of the panorama, the lack of air, the amplifier inherent in independent channels.
Listen to music using the device a bit tedious, but it is very efficiently transmitted audio recordings of films and computer games. 340, where a friend of mine recently bought for $ 60 – In any case, the amplifier significantly higher than the multimedia system Logitech Z showed.
Another good time – managed the possibility of simultaneous volume in all channels, which are in agreement, will be carried out very easily. Thus, the system of recurrence of 2.1-channel system chip-amp was recommended to improve the prospect of that.
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