What is a Monoblock Amplifier?

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Four Q1-4500.1 Monoblock Amplifiers installed in a trunk with a battery bank.
Four Q1-4500.1 Monoblock Amplifiers installed in a trunk with a battery bank.

Monoblock amplifiers send power through a single channel.

They are ideal for subwoofers. 

If you’re new to car audio, you’ll see the term Monoblock Amplifier.

What does it mean?

Mono amplifiers can be used to power single or multiple subwoofers.

You can pair monoblocks with multiple channel stereo amplifiers for a refined and balanced tone. Using discrete controls like low-pass and subsonic filters in concert with the filters on your multiple channel amplifier will make your car stereo sound its best.

Why do you need a monoblock amp and subwoofer in your car?

Stock factory door speakers and dash tweeters are not capable of faithfully reproducing frequencies below the 80 Hz range,

You can try to play re-bassed music on your 6.5-inch coaxial and component speakers but it will sound muddy and distorted because they are not designed to play in that bandwidth. 

Factory car stereos are capable of powering the stock OEM features, like door speakers and dash tweeters. They are not capable of powering high-RMS subwoofers.

If you want bass in your car that brings your music to LIFE, you’ll need a subwoofer. If you have a subwoofer, you’ll need to power it.

That’s where single-channel amplifiers like Monoblocks come into the picture.

Mono amps boost a single input signal through a single output channel. 

Mono Amplifiers are not full-range amplifiers. 

Since they lack left-right separation, a mono amp alone can’t reproduce stereo signals. Your Mono Amp has two speaker inputs so you can utilize series and parallel wiring methods to achieve your desired impedance level. Learn more about wiring here.

Multiple channel amplifiers provide stereo separation and imaging. Meanwhile, monoblock amps have one channel.

Monoblocks are ideally suited to drive low-frequency audio signals to your subwoofers.

Why does bass play on a single channel? 

Bass and sub bass frequencies are omnidirectional.

That is because the physical size of the wavelength will be greater than the size of your car. For instance, 20 Hz waves can be longer than 56 feet and even 80 Hz wavelengths can be greater than 14 feet. Even if there was low end stereo separation, you would not be able to hear it in your car. 

Low-frequency sounds spread out quickly. This dispersion makes it seem like that luscious low end is flowing from several different directions at once. It is easy to fill up a small space with bass. (And fun!)

A properly tuned monoblock powering your sub-stage lightens the load on your factory amplifier. 

Tuning bass tones out of your component and coaxials speakers allows them to play with greater efficiency.

They are not reproducing frequencies that they were not designed to play. This ensures greater life and sound quality from your midrange drivers.

The result is improved sound quality with a solid low-end foundation. 

Read: Monoblock powered subwoofers reduce the bass load on your stock factory system so your music will sound better and deeper.

Each SoundQubed monoblock amplifier features a variable 24dB/octave low-pass filter to limit the frequencies your sub tries to produce for an optimal listening experience. A subsonic filter allows you to limit distortion and tune your sub-stage correctly for your enclosure. 

Pound-for-pound, dollar-for-dollar, and decibel-for-decibel, SoundQubed Amplifiers, Subwoofers and Speakers are the best and bassiest burp, boom and bang for your buck.

Now you know a little bit more about MonoBlock Amplifiers, let’s install one!