For Acoustic Guitar, Saxophone, Trumpet, Violin, Harmonica, Acoustic Bass, andMore

Legendary Zoom Effects
With specially engineered effects, built-in looper and drum machine, the A1 FOUR is the first Multi-Effects Processor designed for a variety of acoustic string and wind instruments.

Extraordinary Effects
The A1 FOUR is preloaded with over 80 effects, including more than 35 new groundbreaking effects designed and engineered for acoustic instruments.

Unlock the Potential of Your Acoustic Guitar
Add a multitude of warm and rich tones to your guitar. From live unplugged performance sounds to the finger-playing style of country and blues, theres so much to choose from. Gorgeous effects and acoustic guitar modeling will take your instrument to places its never been before.

Acoustic Guitar Modeling
Add depth and dimension with acoustic emulators and modeling. Refresh your instruments natural sound, allowing your live performances to sound just like your studio recordings. Select and hone in on the tone of your favorite guitar make and style.

The A1 FOUR make it easier than ever to process the sound of your own Acoustic Guitar.
With a selection of 15 factory presets (plus13 more available as free download on Guitar Lab), you can select your favorite AG MODEL, D-28 for example, and recover instantly the sound character of that renowned and original body shape.

IR (Impulse Response) technology is used to capture the sonic fingerprint all guitar shapes and bodies available on the A1 FOUR and via Guitar Lab. Each AG MODEL can be adjusted with 4 parameters (Gain, Bass, Mid, Treble) to control the volume and refine the audio output of your modeled sound.

In Patches you can also set the AG Pickup Selector (AG PU SEL) to match your guitars pickup type (Piezo or Magnetic) and add a specific EQ modeled on a variety of dedicated processors.

Give Your Sax an Entirely New Soundscape

Perform that gritty, rock-and-roll sax growl. Or use the lush custom-chorus effect to emulate the sound of jazz fusion. The A1X Four gives sax players a soundscape of possibilities. The all-new SaxChorus effect delivers a more natural double-track and thick tone response by softening the modulated sensation typical of a chorus designed for the electric guitar. With ready-made settings for EQ and Compressors your sax will preserve its acousticly warm sound, even when amplified throughmics.

Take Your Trumpet Back to the Future

From the bright sound of electric jazz to our signature Auto Wah sound effect, the A1/A1X gives you inspiration for any style you play. With the Tp MD70 preset patch the Pedal Wah sound is tuned, resonates and adapts to the low frequency range and curve of theTrumpet.

Turn Your Violin Into an Orchestra

From the rich, full sound of a string symphony to the raw, distorted explosion of metal, the A1/A1X FOUR have effects for everygenre.

More Body for Your Harmonicas Soul

Play punchy, mid-range sounds of a blues harp, or experiment with your own new sounds. Breathing new life into your harmonica has never been so much fun.

Play through the preset patch Hm StevieW and get that famous harmonica sound as the choruss wet signal effect is modified to fit the frequency response of the chromatic harmonica.

The A1X even provides you with a truly effective simulation of the Bullet Mic, also known by harmonica players as the Green Bullet. Select the preset patch Hm Juke and now hear the legendary amplified, warm tone of the Green Bullet come to life, even when using any standard vocalmicrophone.

Take Your Upright Bass to New Heights

With focused highs and rich lows, the A1/A1X Four gives you control and flexibility from classical to rockabilly and all styles in between. Add octaves, select your piezo effect or create your own unique signaturesound.