Amplifier Settings – Basics

Setting up the auto amplifier for the subwoofer and also the remainder of the audio system can be confutilizing for a beginner. Fine-tuning – is not basic and also calls for the majority of endure or skilled assist.

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In this article, we will analyze the standard settings – so that you carry out not burn anything, the subwoofer did not try to play the violin, and everything was in its area.




Hight pass filter, additionally recognized as HPF – filters (cuts) the low frequencies, leaving high.

When establishing up the subwoofer amplifier, set the manage to about 20 Hz, to reduced off the infrasound and not waste power, as you won’t hear it anyway. For mid-array speakers HPF is collection in the region of 80 Hz, to remove the low-frequency variety, for which the speaker is not designed and will not have the ability to play it. If you have actually separate channels or also separate amplifier for tweeters – HPF have the right to be collection in a room of ​​3000 – 5000 Hz, relying on the model, not to burn them.

All these numbers are approximate, for even more exact and safe values, examine the qualities of your speakers! Low pass filter, additionally known as LPF – oppowebsite of HPF and also cuts off high frequencies, leaving the lower.

For subwoofers, it is set in the location of 50-80 Hz depending upon the form of style (closed box, phase inverter, etc.) to reduced off frequencies for which the subwoofer is not intfinished. Similarly, through the midselection, for them reduced in the array of 1400-1600 Hz.

If feasible, you deserve to limit the tweeters to 20,000 Hz, yet this is not essential.




Gain (sensitivity) is often perplexed via the volume, but this is not totally correct.

Gain – is the adjustment of the input sensitivity of the amplifier to complement the radio. But let’s not get into the wilds, and let’s think about this setting from usefulness for the user.

Sometimes the value of Volt (V) shown on the regulator can be misleading. The reality is that the sensitivity is measured in Volts. The reduced the V – the greater the sensitivity – the louder the speaker will play and also vice versa.

Setting acquire by ear (Method 1)

Having a great channel amp 4 (inspect this), perform not usage the equalizer and also miscellaneous bass improvers. Forobtain around bass-rise on the amplifier – so prior to establishing the obtain, make sure that every one of this was turned off!

Set the regulator to the minimum, and also turn on the music you normally listen. Adsimply the volume on the radio 3/4 of maximum, hearing distortion in the sound of the subwoofer before – sheight and also rotate down the volume by a pair of divisions. Go to the amplifier. Ask the assistant to gradually include the regulate of the get till the appearance of brand-new distortions, and also hearing them, stop the rotation and also revolve it dvery own by 10%.

Setting acquire by ear (Method 2)

If you perform not trust your ears and are afrassist not to hear the changes in time, then usage the even more precise method – via the help of the sinsupplies.

If you connumber the subwoofer, use 40 Hz, if your body is configured above 40 Hz, or you have a closed box, then take 50 Hz. To collection get for the mid-bass amplifier, take 315 Hz.

Sinus or tone (in our case) – tamong a particular frequency, alters in the sound of which you have the right to easily hear.

Set the obtain to a minimum, revolve on your sinus, and also readjust the volume of the radio. When the sound of the tone signal has readjusted, stop and revolve dvery own by a pair of divisions (set the maximum volume limit to this worth, if your radio has actually such feature). Go to the amplifier. Similarly to the first approach, add get. When the sound has changed, sheight and also rotate it dvery own by 10%.

Setting get through a multimeter or oscilloscope



Setting the obtain level with the assist of tools is knowledgeable and specific equivalent while neither the speaker nor your ears perform not strain.

Note that when you set up through a multimeter, you must be confident in power declared by the manufacturer of the amplifier.


Subsonic – it’s the very same high-pass filter (HPF) on the sub amplifiers (often on monoblocks) – cuts off infrasound. Set it to about 20 Hz.

Bass boost



Bass boost – increases the volume at a particular frequency, commonly at 40-45 Hz.

When utilizing bass-increase possibility to burn subwoofer rises as clipping occurs a lot earlier. In most instances, bass-increase is not needed and if you are beginner, then accept the rule of “carry out not touch bass-boost!” It deserve to be offered by experienced human being to boost the frequency response shelf to pull dips at particular frequencies, yet it’s a deep establishing, and the result does not constantly justify the danger.


X-over – filters switch. It is current in the situation when the amplifier does not provide adjustment for each filter separately. HPF – cuts from the bottom, LPF – cut from the top, Full/Flat – filters are disabled.

Phase controller (Phase)

Phase controller – is part of the advanced tuning – transforms the phase of the speaker. Tright here is a fixed switch 0/180° and a regulator 0° – 180°.

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This switch is offered in a bridged monoblock connection. Master is collection on the amplifier, to which RCA from the radio is associated, Slave is collection on the connected monoblock.