AV amplifier and a speaker of the combination of low-grade to produce beautiful voice, and this combination of low-grade and many around us. How to conduct cost effective and have less of it so that it upgrades. I recently made the following attempt.
AV amp machine is "SONY-AV777" type (a karaoke OK), four eight-channel DSP technology efficiency. Two main speakers for the 2-, 8 inches, landed inverted phase me. No internal partitions without sound-absorbing materials, two speakers were 100 W8 Ω and 60 W8 Ω, dividers for 4,7 μ F small electrolysis.
Then AV amp to a machine anatomy: signal input, front, amplifier, speakers and power protection are part of a separate plate. The main channel, surround-channel amplifier board to promote some of the same output of only different. 2 SC3201/2SA1302 the main channel used to control power output nearly 100 W. HSE830RT/HSE838RT surround channels used to control power output can also have 60 W and protection are available. Heat sink for a cellular-style. Power spent part of a ring of about 400 W changed, two-way sharing of power supply, respectively 60000 μ F electrolytic filter. Pre-production but also very particular about the logo of the integrated block have been unable to wipe it detailed examination regardless of it. Since the AV amplifier output power of the speaker and the input power still supporting, why can not AV amp to the most popular e-frequency stereo amp machine? This machine features the original amp being fully utilized, the effect will be greatly improved sound quality, the loss of only that the delay did not listen to surround sound.
Speaker of the first to be transformed. In the box to add the two plate. A unit in the treble and bass unit, and another one in Woofer below the original box junction box in the internal back, from top to bottom, on both sides of paste 1,5 cm thick sponge, two speakers and junction box Below are pad 1,5 mm thick foam to prevent running the sound board. This speaker on the transformation of it.
Then in the pre-existing lines between the amplifier and additional electronic sub-sub-frequency electronic circuits playback, not moving elsewhere. The isolation of a buffer circuit Butterworth second-and two-frequency active sub-frequency electronic circuits. Specific lines see Figure 1, Figure 2.
NE5532N with three sub-frequency components of electronic circuits. IC1a buffer circuit isolation, IC2a, IC3a composition of both active filter for frequency, Fc as 3300 Hz. P1 ~ P4 four better quality of fine-tuning adjustment for the resistance front - the frequency at the output level circuit. ± 12V of power from the amp, because of longer lines need to increase the board two sets of (1 μ F +220 μ F) filtering system. The whole circuit in a production of 8 cm × 4cm small plate and fixed in the front edge of plate.
Cable channel at the original front of the main signal output as an electronic crossover signal source, the channel surround signal output is not a line. The electronic board at the two-way bass output signal to the respective boards of origin-channel amplifier input signal.
The two roads will treble output to the original surround-channel amplifier-input signal. At this point, the end of restructuring. Preview the results are encouraging. However, AV amp will be e-frequency amplifier for the work is a careful, first of all to the original composition of a comprehensive assessment of all aspects and only in appropriate circumstances to make sense of.
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