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Pioneer DEH-P4100 volume is noticeably lower when listening to the radio. Volume normal listening to CD, Aux and USB. Small external amp controlling sub but that shouldn't affect tuner. What ya think?

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The tuner feed is at lower level than other sources. Happens. Unit may have a control for this internally and you might want to check it out with manufacturer of unit.

Posted on Jul 02, 2017


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The volume is noticeably lower when listening to the radio. It sounds normal on CD, Aux and MP3. I know it has a built in amp. Could this be the issue. Thanks.

You have not mentioned what type of radio you have, what car it's installed in, and what other audio equipment you have. I will assume it's an aftermarket radio, and it's common that the tuner's signal strength is not going to be as powerful as the other sources. If the built in amp is used, then it's used all the time, with all sources, including the tuner. Some brands will have a loudness offset function wherein you can lower the power output of the CD/Aux/MP3 inputs to volume match the radio, but there's no fun in that. There's not a way to make the tuner play louder, unfortunately, aside from adjusting the volume when using the tuner section. Technology has brought many advances, including a much higher signal to noise ratio, which is why digital trumps analog in this instance. This is what you are experiencing, which is not necessarily a technical issue, but a technology issue.

If you need further help, I’m available over the phone at

Jul 02, 2017 | Car Audio & Video

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What could be causing a loud popping when volume is raised past a certain point?

This is normally cuased when customers rely on small amp in any radio instead of an aftermarket amp. If your radio starts to clip wither lower to normal listening volume or invest in a aftermarket amp to amplify sound.

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