Behringer Ultracoustic ACX450

Behringer Ultracoustic ACX450

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Ultracoustic ACX450, Acoustic-Electric Guitar Amplifier from Behringer in the Ultracoustic series.

2 user reviews
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Behringer Ultracoustic ACX450 tech. sheet

  • Manufacturer: Behringer
  • Model: Ultracoustic ACX450
  • Series: Ultracoustic
  • Category: Acoustic-Electric Guitar Amplifiers
  • Added in our database on: 04/24/2006

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Behringer Ultracoustic ACX450 user reviews

Average Score:4.0( 4/5 based on 2 reviews )
 1 user review50 %
 1 user review50 %
Audiofanzine FR12/05/2008

Audiofanzine FR's review

Behringer Ultracoustic ACX450
(Originally written by aalin/translated from Audiofanzine FR)
See features on the manufacturer's website. The rear panel connections are not comprehensive: two RCA for a CD player and one jack for an effect footswitch.

A line output to connect it to a PA system would be useful for such as small amp.


Ultra easy to use.

It's easy to get a good sound and the EQ allows you to suppress unwanted frequencies.

No user's manual but you won't need it.

The reverb and delay presets sound good but I miss a tap tempo function.


This amp is great for jazz bossa.

I play a Godin Multiac ACS with nylon strings and the sound is very good.

You can get a crystal-clear and soft sound. It's obvious that the 8" speaker cannot produce very present lows. For a deeper sound you'd better buy the 90-watt model with two speakers.

Some FX presets sound rather cheap (especially the chorus effect) but it's ok considering the price. Reverbs sound quite good though.


I bought it today after hesitating in the store between this one and the 90-watt model. I chose this amp because it's lighter, less bulky and has a better sound definition. I recommend this product to people who want a basic and inexpensive amp. If you want to play with a drummer, buy the 90-watt version because the 45-watt won't have enough output power. Moreover, the 90-watt model has more comprehensive connections with stereo XLR output, external FX loop, etc.

The Godin Multiac with nylon strings is pretty difficult to amplify. I was looking for an AER because it was the only one that blew me away, but I tested many different amps (Roland C60, Crate, Fender, Marshall).

I never thought that I would buy a Behringer product, but after trying it out I could faithfully recognize the sound of my Godin, for a third of the AER Alpha price! This amp is less powerful and the controls feel like toys but it's fun to play with it.

Would buy it again? I wouldn't hesitate... Perhaps I will even buy the 90-watt model to play live on stage and I will keep the 45-watt version for rehearsals!!!!!

babali07's review (This content has been automatically translated from French)" Ideal amp for headbanger on industrial air!"

Behringer Ultracoustic ACX450
Transistor amp, two different channels, each with a jack in,
possibility (that I run) to connect an mp3 on the rear panel with two RCA jacks (left / right useless because there is a single bafle!)
Power and very good for a 45 Watt.
Settings (EQ 5 bands) and effects (phaser, delay ...) are not too bad, but this amp amplifies much more lower than the trebles.


Having a crystal clear sound from his electroacoustic guitar is difficult, but possible.
If the source is a computer, or a low mp3 are powerful!


It suits me to listen to music, however when I play with the sound is strange, we must also say that I refuse to play the electric over!
Fatty sounds are ubiquitous, the palm mute spring (too)!
I mostly play my electric is a Blade Texas Standard, but I prefer the sound with my electroacoustic O10SCE (Odyssey) Tacoma.


I did not try too models before, apart from various small 15 watts.
I want to play on the industrial metal, because the power is!
I can buy me a second to listen to stereo music, and stronger!

The thing to remember is that this amp has a good sound to amplify an electroacoustic guitar, and violent music, but do not expect to succeed jopuer electrical above without ears bleed a little ( but I want to succeed!)

electric guitar / / acoustic amp >> mystery.

Behringer Ultracoustic ACX450 images

  • Behringer Ultracoustic ACX450

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Other names: ultracousticacx450, ultracoustic acx 450, ACX450, ACX 450

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