Review on 🔊 WINGONEER TDA7492 Wireless Bluetooth 4.0 250W 2-Channel Audio Receiver Amplifier Board Module by Benjamin Chang

I got what I expected. I knew it would be overrated. I knew there would be other downsides. I first put this amp through some subjective testing with two 4 ohm speakers and several different input voltages. I then used a very expensive Audio Precision unit to accurately measure the power output, signal to noise ratio and frequency response. I also noticed some oddities, so let's get on with it all. 1) It's a far cry from 50Wx2 @ 10% THD as advertised. Even with the lowest gain setting (of the 4 available) you can easily hear distortion in your music when cranking with ANY input voltage. Toggling DIP switches to increase gain only makes matters worse. And for real AP numbers? 1.75W RMS x 2 @ 1% THD @ 12.5V input into 4 ohms. This uses the AUX input, the board's minimum gain and sets the board's volume to the default value (it's the default value when you turn off the device). Increasing the input voltage to 16V resulted in 2.6W RMS x 2 at 1% THD. How about a raise to the nominal 10% THD? 15.5W x 2 at 10% THD. Again, increasing the gain on the board or the volume the board was set to will only speed up the distortion. this. I need less signal voltage to get the same performance and distortion. you get nothing The signal-to-noise ratio of 1 W is 73.5 dB for both channels. Not scary. The frequency response was flat from 10Hz to about 5kHz, then a REAL flat low pass filter was applied to 20kHz (see attached sweep). Finally, notice that the outputs are actually 180 degrees out of phase with the AUX input. That's ok since both channels are 180 degrees out of phase (so in phase with each other) 2) The board has several built in tones at power up which are not quiet at all. At such a low gain, they are tolerable at best. In any other environment, they'll loudly scare you to death. I've noticed that a lot of YouTube videos conveniently don't have an on-screen part in their video. 3) I can play AUX audio and stream BT from a paired device AT THE SAME TIME! WTF people?!?! 4) As I said, the board defaults to medium volume every time it is powered off (and there is no power button on this model). Turn on the device, assuming it's within range, of course. 6) It is not possible to force the board into pairing mode. Simply disconnecting the Bluetooth connection does nothing. So once you connect a device, you're stuck with it until you turn it off, remove the board from your device's Bluetooth list (or turn off Bluetooth), and turn the board back on. In that sense, this board only remembers one device. So if your phone and iPad have saved this board in the bluetooth list, it will be played by the phone, you turn off the board, remove the board from your phone's bluetooth list, turn on the board again, it WILL NOT connect automatically . on your iPad. He doesn't remember it. You need to click the Sanwu board on the iPad to link it even if it is saved in the device list. It no longer appears in the board's device list. 7) Current draw numbers. I haven't tested much here as I only tested the board for my intended purposes. 12.5V input from power stack (250A) and 4 ohm speaker. Instantaneous inrush current was measured right at 3A during power up (so use a decent power supply to power it). The no-load current with no sound was only about 6mA. With the board gain set to minimum and using the default volume setting you get when you turn it on while the Galaxy S7 Bluetooth is streaming at maximum volume, I got a peak current draw of 600mA when playing music (max over 3 times) . hungry songs). If I also turn the volume on the board to maximum it starts to distort the sound too much to hear and I measured about 2.4A maximum. These current numbers seem to match the pathetic performance numbers I've measured. This is a board with a lot of distortion, like most of those ultra-cheap Chinese amplifier boards. For two seconds, Google will show you hundreds of people complaining about this and then trying to change it (many successfully). But while this board is worth it, you can hardly run the damn thing at anything other than the minimum gain level, both in terms of distortion and insanely loud tones when turned on. But subjective hearing? What really matters? Not scary at all. My advice is to set the gain to the minimum, set the volume to the default, and just use the connected device to control everything. I think most people will be shocked at what a few watts can do.