Aluminum TDA7294 liquid crystal display control amplifier
The power amplifier board produced by the vision of electronic factory (wholesale discount)
Brief introduction of the product
TDA7294 is one of Europe's leading SGS-THOMSON STMicroelectronics company in integrated circuit of a big power output in the 90. A bile taste. Completely changed the previous integrated power amplifier, cold, hard tone, widely used in the field of HI-FI. The chip is designed to tone as the focus. Has the advantages of high pressure, low noise, low distortion, sound soft song. The power amplifier board power is 2 * 80W two-channel anteroposterior combined type power amplifier board.
Product details
The product of all parts are original authentic, chastity, pure quality; the use of high-quality original parts, is not only the safety quality guarantee, long service life, more important is the powerful guarantee to make the actual performance can meet the design goals. The pursuit of first-class quality is our consistent aim.
The genuine original TDA7294 and LC75342?.
? coupling capacitor using WIMA top 2.2UF capacitor, electrolytic capacitor signal the main circuit uses the Taiwan famous brand, the main filter capacitor NOVER with a capacity of 2 × 10000UF, with 25A and above the flat bridge rectifier, which support the powerful everfount power.
Resistance selection? Five metal resistance, the main circuit uses the metal film resistor accuracy of ± 1%, the signal-to-noise ratio of the good.
? PCB with 1.6mm thick double-sided board, 2 oz copper thickness, tin spraying the whole process, ensure the size of the current good through the performance. PCB first-class quality.
? using the advanced C1237 BTL speaker protection circuit, the impact of noise effectively eliminate open, shutdown and DC output protection function, make your horn more secure.
? this machine adopts aluminum chassis, chassis surface by drawing oxidation coloring process.
The entire circuit board layout is rigorous and rational, the overall PCB lines with one point grounding mode. The power amplifier board is stable and reliable work, high output power; a beautiful voice, sound field open. Three-dimensional sense of strong, low frequency sound solid and strong, the signal-to-noise ratio is quite outstanding, wide dynamic range, excellent transient response; clear details, play all kinds of music are handle a situation with ease, has the very good performance in the playback environment family under the.
This board is very simple, as long as the allocation of few parts can be assembled into a beautiful tone HIFI stereo integrated amplifiers, very suitable for audio enthusiasts production use. Also can be according to their understanding of the circuit for better, better parts, enjoy the fun of DIY process. (definitely worth a try, the effect is very good)
Function:
1 remote control and coding switch can control signal input / volume / gain / treble / bass adjustment
2 with memory function (can choose not to bring a memory)
3 support function remote control switch machine
4 with mute function
The 5 volume from "-79DB" to "20DB", one-step 2DB
6 0DB to +20DB as the gain adjustment
7 treble "-10DB to +10DB" regulation
The bass has "-20DB to +20DB" regulation
8 encoder with input select switch, encoder switch can be switched according to the input signal (three inputs are respectively CD, DVD, AUX)
Basic parameters:
Power: 80W+80W
Working voltage: AC220V