A complete amplifier module for subwoofer on the TDA7294 bridge.

Implemented functions:

power amplifier based on TDA7294 (70-140W)
gain regulation
adjustable low-pass filter (80-150Hz) with the option of shutdown (full-band operation)
phase switch (0-180 degrees)
subsonic filter (passive 3-order 19,25,33 Hz to choose from)
auto-on / off with the switch of this function (ON / AUTO mode)
mono (low) level input (sensitivity around 150mV)
high-level (stereo) input (differential, sensitivity approx. 1.5V)
silent on / off systems

The dimensions of the tile are approximately 10x10cm. In addition: TDA pressure beam (three-hole laminate).

For proper operation, the module needs a transformer connection
power and heat sink.
Recommended transformers (for maximum power):
1. 1xTDA7294 version: 100W 2x24V for 4ohm, 100W 2x30V for 8ohm
2. 2xTDA7294 version: 200W 2x24V for 8ohm, 200W 2x30V for 16ohm

The module is constructed in such a way that without arming the awakening and the relay it will also implement the auto-cut function, then the armed mode will be based on the main turn-on.

TDA7294 Amplifier IC prepared with two different subwoob bass amp circuit and they both look alike 200w that circuit 2 TDA7294 bridge connecting power enhanced bass filter Katinka’s supply 5 .6 w a small transformer is taken from the fact amp supply being regulated it can be fed di but this way more been a good case can be made according to the conventional system. TDA7294 circuit 1 circuit which used 100-watt than other simple …

Two-speed PCB design at it’s very smart and shared all the details pcb, diagram layout, etc. ..

Source: fratu.pl/irek

FILE DOWNLOAD LINK LIST (in TXT format): LINKS-18457.zip