How to Choose the Best Ultrasonic Amplifier

Ultrasonic Amplifier
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How to Choose the Best Ultrasonic Amplifier

An ultrasonic amplifier

Numerous commercial ultrasonic devices operate at a single frequency and use transducers that are engineered to peak at or resonate at the designated frequency. Because of their limited bandwidth and higher prices, the bulk of these transducers is not suitable for use in a hobby or do-it-yourself projects. 

Should you get an ultrasonic amplifier?

Almost every piezo speaker can be used as an electrical device for both purposes—as a broadcast output device and a receiver sensor. This is because piezo speakers are made up of piezoelectric crystals.

Even though the efficiency of piezo speakers cannot be compared to the performance of a specialized industrial transducer, they can be an excellent choice for a hobby and a fun project. A 33/4-inch piezo tweeter, which is accessible from the majority of internet retailers, was the component that we used with the circuits discussed further below.

Things to consider when choosing the best ultrasonic amplifier 

Power: Speaker sensitivity is important.

Power output equals music volume. The larger the speakers or space, the more power you demand (to your neighbors’ chagrin). You probably don’t require much electricity. 10W is loud enough for normal listening, and 100W will rock most gatherings.

THD: Less is more.

THD + N measures the amplifier’s influence on sound output. More distortion colors the sound. The lower this number, the more like the original recording the amplifier will sound. Choose speakers that fit your listening pleasure for the best sound.

SNR: Size matters!

In a quiet room or in the countryside, you may hear sounds you’ve never heard before. Radiator humming or passing automobiles are examples. This is all background noise while the kids are home and watching TV. An amplifier has noise from electrons flying around within. The idea is to reduce background noise, so you hear more music. The signal-to-noise ratio measures this.


Cross-talk measures how much-unwanted left signal mixes with right output. Amps all having one box are trying to be independent boxes one each channel, breaking off the signals. So, when it hits the speakers, you can know the vocalist is standing to the left and the violins to the right. Cross-talk affects stereo separation, making it harder to identify instrument placements.

Cross-talk separation improves as the number after the negative sign increases (i.e., 60dB is not as good as -100dB).


Can you link everything? You’ll need enough input for all your devices. 3.5mm for iPods, Phono for turntables, and USB for laptops and HTPCs. Choose the one with the finest sound quality when there are several possibilities. As turntable signals are tiny and readily interfered with, we isolate phono stages in our Azur devices.

Depending on your budget, you can get an ultrasonic amplifier from under $100 up to $1000. So, the important thing to consider is your budget when you buy an ultrasonic amplifier. 

You can also read: How to Choose Best Over-Ear Wireless Headphones

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