Fender Acoustasonic 90 Amplifier Review 2023

Fender Acoustasonic 90 Guitar Amp Review

The Fender Acoustasonic 90 is a solid state amplifier that is simple to use, made specifically for acoustic guitars. This amplifier is a closed back combo amplifier with an 8-inch speaker and horn.

It is a 2 channel amplifier which provides an input for your guitar but also one for a microphone, turning the amp into a PA for huge versatility!

Fender Acoustasonic 90

Fender Acoustasonic 90 Features

Let’s take a look at some key features of the Fender Acoustasonic 90.

  • 2 Channel Solid State Amp
  • Combo Amp With 1-8″ Speaker and Horn
  • Feedback Control Circuit
  • Effects built in
  • Balanced line Out
  • Microphone Input
  • 90 Watt Output Power
  • Light Weight



  • Build and Design
  • Great Sound
  • Microphone Input
  • Built In Effects
  • Direct Out – XLR
  • Volume seems lower then 90 watts with some instruments
Fender Acoustasonic 90 Rear

Fender Acoustasonic 90 External Hardware

Firstly, the acoustasonic 90 is an 18 pound closed back combo amplifier, measuring in at 19.5″ wide, 15″ high and 10″ deep. It has on board a 1 – 8″ speaker and 1 – Piezo horn in a wood enclosure with a clean brown tolex and sharp silver corners.

All controls are on the front of the amp with an included microphone input to act as a PA which is a nice feature. All controls feel quite rugged and are built to be pretty tough.

The amplifier is a closed back design, which is what you would expect from an elect-acoustic amplifier.

There is a foot switch jack on the rear of the amplifier, but the foot switch is sold separately. The balanced XLR out on the rear is also a nice feature which will allow for direct out when it is required.

Considering it doubles as a PA this is a great feature to have on board.

Fender Acoustasonic 90 Controls

Fender Acoustasonic 90 Channels and Controls

The Fender Acoustasonic is a 2 channel amplifier with your standard EQ arrangement of treble, mid-range and bass. The first channel is for an acoustic guitar and lets you shape your sound to taste.

But also lets you add effects to the sound, which is nice. There is an effects select control on each channel that provides Reverb, echo/delay, chorus, vibratone and other effects.

There is also a feedback elimination push button on each channel that is designed to prevent any feedback from an acoustic at higher volumes. This is an incredibly powerful feature and will change your experience when you want to crank it up!

Channel two doubles as a PA and will accept a microphone through the XLR or 1/4″ jack! This is a super versatile amplifier and can be used alone for performances for vocals as well as acoustic!

Finally, there is a foot switch jack on the rear and a XLR for direct out providing some great features should you need them.

Output Power

The Fender Acoustasonic is rated at 90 watts and is very capable of getting there!

We had to drive the inputs higher than we had expected, but found that this changed with each acoustic we ran through it.

Overall, the amplifier is loud enough for the type of settings it will be used in and did not distort when played at higher volumes.

Microphone Performance

The second channel is a really great feature! We added a microphone to the channel to test the feature, and it sounded better than expected!

There was a clear, crisp sound with plenty of volume. This is really a great amplifier for those who play an acoustic guitar and are also vocalists!

Fender Acoustasonic 90

Fender Acoustasonic 90 Sound

What can we say, fender knocked it out of the park with this acoustic amplifier! The moment I ran an acoustic guitar through the amplifier, I was lost in great tone!

Without much EQ fiddling, the sound was rich and projected very well. At higher volumes, I was able to engage the feedback elimination control circuit and had a powerful, stable acoustic sound! Very impressed with this little amplifier!

Channel two with a microphone sounds just as good. The amplifier provided a clear and crisp vocal sound that just puts this thing on the top shelf!

The capability of playing and singing through an 18 lb amplifier with this quality under $500 bucks is a steal! Plus, the built-in effects sound great and do an excellent job of shaping the sound of either the guitar or your vocals.

I know what you are thinking though, how does it sound with an electric? Well, I’m happy to say we did test that out as well! With a telecaster into the input, the amp was just as brilliant.

The input was pushed a bit harder, and we were able to get a bit more volume out of it with the telecaster. Once again, the telecaster sounded great through this amp. It is a great little unit, especially if you are doing solo work, or simply practicing at home.

Conclusion And Final Thoughts

There are not many guitar amps on the market that offer what the acoustasonic 90 does. Finding one that is made for an acoustic and also sounds great can be a challenge.

The acoustasonic 90 really impressed me, it is capable of providing some great tones and effects! The addition of a mic input was also a really cool feature and not one to be overlooked. For the beginner learning on an electro-acoustic guitar, this is your next amp!

The addition of a direct out XLR jack on the back really makes this a solid choice for those who play small gigs.

The amp can also be used with a foot switch, which is highly recommended for added versatility.

This is a lot of bang for your buck and highly recommended!