How to tune a monoblock amp with a multimeter
I come to you again with another Do-it-yourself method. You always want a quality sound anytime you get a speaker. As time pass by, the efficiency of the machine decreases and how do you get in shape? You can do this by tuning the monoblock amp with a multimeter. This method is not known by a lot of people because they think it is too cumbersome to do. This blog is here to address this issue by teaching you how to tune a monoblock amp with a multimeter. Before we get into this, let us take a look at how a monoblock amp works. You can also learn how to test a laptop battery with a multimeter.
What is a monoblock amp? How does it work?
As the name implies, this amplifier intensifies a single channel and it is made from only a unit. It only has an input, a power supply, and an amplifier circuit that transmit a signal to the amplifier.
Class AB Mono Blocks Amp
When a signal is transmitted to an amplifier, it permits power to flow through from the power supply unit. However, there is always power passing through to the switch, if no signal has been transmitted to the amplifier.
This flow of current without a signal being transmitted by the Class AB mono-block merges the clean and less precise sound of A but the Class B amp produces an energy-efficient sound.
Class D Mono Blocks
The D stands for digital. With the Class AB Mono Block Amp, the power must always be on to allow transmission of signals but the Class D Mono Block Amp turns it on and off in quick succession to arouse the input signal. Now let’s take a look at how to tune a Mono Black Amp with a multimeter.
Step-by-step guide on how to tune a Monoblock Amp with a multimeter.
- Anytime you want to use a multimeter, the first thing you do is check for the continuity of the multimeter.
- Turn the speaker off and unplug it from the main socket.
- Attach the red test probe of the multimeter to the positive terminal of the speaker and the black test probe to the negative terminal to measure the impedance of the speaker.
- Once the readings on the multimeter change, record and compare the impedance on the speaker to the wattage of the amp. This is simply done by checking for the output on the manual and comparing it to the readings you recorded.
- The next thing you do is calculate the target AC Voltage
This is calculated by V= the square root of P x R
Where V= output voltage, P= Wattage, and R= impedance of the speaker. For instance, if the wattage output given by the manual is 800 and the impedance of the speaker is 8ohms then
V=800 x 8,
V- Squre root of 6400
The output voltage is 80V
- Unplug speakers, subwoofers, pen drives any other electronic gadget.
- Turn the regulator of the equalizer to zero and shut the equalizer off.
- Turn the regulator to gain to zero. This can be achieved by simply rotating it in an anti-clockwise direction.
- The volume should be increased to about 70%.
- Play test tone on the speaker. This is done to make sure that the amp has been detached from the speaker.
- Connect the multimeter to the amp. Attach the red test probe of the multimeter to the positive terminal of the speaker and the black test probe to the negative terminal to measure the voltage of the amplifier.
- Fine-tune the knob of the gain. As you do this read the measurement on the multimeter, when it gets to the output voltage you calculated, in this case, 80 stop the adjustment of the knob.
- Plug in all the peripherals you unplugged from the amplifier.
- Play any music of your choice and enjoy the improved sound of your amplifier.
Final thoughts on how to tune a Monoblock Amp with a multimeter.
You have read and realized that this is very easy to do and you are not wasting any money to call any technician again. Knowing how to tune a monoblock amp with a multimeter is another skill you have added to what you already know like testing a dryer moisture sensor with a multimeter and testing a distributor with a multimeter.