How to set up your amp for speakers by ear. This will done by ear without any alternative equipment other than some basic tools. Having an amplifier properly setup with maximize your sound quality and ensure you’re not causing damage to your speakers. I have my hidden amp under the driver side knee panel of my Dodge Ram. The amp I have is a four channel amp meaning it’s powering both front and rear speakers. It has individual controls for the front and rear, this is needed when running different types of speakers. My fronts are 6x9” and my rears are 6 1/2”. #caraudio #music

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Tools/Supplies Needed:
-screwdrivers
-40hz sound clip

Chapters:
00:00 Intro
00:23 Why it's Important
01:35 Filter Setting
02:11 Base Settings
02:53 Disabling Door Chime
03:13 Head Unit Settings
04:02 First Pair of Speakers
05:00 Second Pair of Speakers
05:45 Sound Clip of Distortion
06:03 Finishing Up

Procedure:
For adjusting the amp, you’ll most likely need small standard screwdrivers to adjust the switches. With the amp out, disconnect the RCA cables.

Adjusting the filters. We’re using mid to high range speakers, these will be set to HPF or high pass filter for both the front and rear. Off means, all frequencies will be played through the speakers which can potentially cause damage and distortion. LPF or low pass filter is used for subwoofers, when your frequency filter is set, it won’t play frequencies above that set value. When HPF is selected and your frequency is set to a certain value, it won’t play frequencies below that set value. LPF is intended for bass, if you go from off to HPF, you’ll notice a reduction in bass.

Input sensitivity, this is also known as gain adjusts the input stage. You’ll need a balance between high and low. Too high will cause distortion and too low will not allow your system to reach its max performance. Turn both the front and rear input settings to the lowest value.

For filter frequency, this goes to the highest setting so we don’t play too low of frequencies.

It doesn’t matter which you start with first, just plug in one channel to isolate the one type of speakers. Determine what 75% is of your max sound. My head unit’s maximum sound is 35, so 75% of this would be about 26. This is needed to set the input sensitivity or gain.

You can start with some music you typically listen to, then adjust your head unit’s settings. This would be everything from the equalizer, treble, bass, loudness, bass boost, etc. It’s important to do this first, if you do this after it may cause distortion or damage to the speakers.

Some people recommend using music to set up the amp, but it can be tough listening to the multiple tone ranges. The easiest way I’ve found is using a 40hz sound clip.

Make sure your volume is up to 75% and now to the amp. Using a small standard screwdriver, slowly turn up the gain. The hum will slowly increase, eventually, it’ll come to a point where the tone completely changes. This is most noticeable when your amp is set to play a higher frequency.

Adjusting the frequency, for mid-range speakers, you’ll be looking for a range from 75 to 100hz, but this can vary depending on the music you listen to along with the quality of your speakers. This is something that will get re-adjusted after when I play music and not something that I’ll show on video so I don’t get any copyright claims. You can also see as I turn the hertz range lower, it’s harder to sense the gain distortion.

Turn the head unit off. Unplug the RCA cables for one pair and then connect the other pair. Do the same for the opposite speakers.

Once those settings are done, your amp may have come with clear tape covers to close up the adjustment holes. Now I can put the amp back in place. As some tips with troubleshooting. With the fixed settings when I was testing everything out, I was experiencing a hum in the speakers without any music playing and it didn’t change when adjusting the volume knob. Turning the gain down did solve this problem for me. Other issues which can cause a hum are a poor quality amp, a bad ground, poor connection, poor quality or bad RCA wires, or running power wires parallel with audio wires.

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