Stereo 20W Class D Audio Amplifier - MAX9744 + Large Surface

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Leelamb
 
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Stereo 20W Class D Audio Amplifier - MAX9744 + Large Surface

Post by Leelamb »

I've wired up my Stereo 20W Class D Audio Amplifier - MAX9744 in analogue configuration with two Large Surface Transducer with Wires - 4 Ohm 5 Watt and am powering it with a wall plug (12V 5A switching power supply.) It's making sounds and the pot/volume knob is working well but when running a MONO signal through amp, only one of the stereo channels is sounding. This is always the case, whether I'm running mono sound through a mono cable or a stereo cable. It switches from the left and right side depending on the cable but otherwise is exactly the same.

When I run stereo signal through the amp (from a phone or laptop) both transducers work well but one side (typically the left side) is significantly louder than the other.

I purchased two of these Stereo 20W Class D Audio Amplifier - MAX9744's and 4 large surface transducers and have wired both up, switched around the transducers and cables, and the problem is identical with both amps.

Is there any simple solution to this issue?

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mikeysklar
 
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Re: Stereo 20W Class D Audio Amplifier - MAX9744 + Large Sur

Post by mikeysklar »

Using mono you should only expect sound on one side.

We do have another post that recommends a passive circuit you can build to combine both channels and produce a single mono signal.

viewtopic.php?f=8&t=67995

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