ST-2

Power Stack

ST-2
Where to Buy

Authentic Stack Amp Sounds from a Stompbox

The ST-2 Power Stack delivers fat, powerful tones inspired by classic tube-based stack amps. The innovative Sound knob offers immense tonal range in a single control, letting you dial in everything from mild drive to full-assault distortion. To fine-tune your overall sound, simply tweak the onboard two-band EQ to taste. The ST-2 is one potent pedal, calling on decades of BOSS amp modeling research to bring you many coveted rock sounds in a single stompbox.

Feel the Power

The ST-2 dishes up the famous feel and power of a raging stack, backed by extensive BOSS analysis of the characteristics of benchmark amp designs. Just like the real deal, the sound naturally responds to picking nuances and volume changes on your guitar. But emulation is only the beginning, as the versatile ST-2 gives you a ton of creative range with a few simple controls.

Secret Sauce

The ST-2 puts an expressive distortion spectrum under your fingers without the punishing volume of a cranked stack amp. The Sound knob is uniquely BOSS, adjusting the gain and sound character at one time for fast tone shaping. Many musical colors are available with a twist, from mild crunch to earth-shaking gain and everything in between.

Touch-Responsive Tones for Every Style

Real stack amps are loved for their dynamic power, and the ST-2 captures this experience. Back off your volume knob and play soft for a rich, clean tone. Then smoothly transition into fat crunch as you wind up the knob and play harder—great for songs that require dramatic tone shifts. Classic rock tones are here as well, filled with punch and crisp overtones. Maxing the Sound knob puts you into ultra-heavy territory, providing extreme gain with a rich low end and a sharp edge to cut through the mix.

Nominal Input Level
-20 dBu
Input Impedance
1 M ohm
Nominal Output Level
-20 dBu
Output Impedance
1 k ohm
Recommended Load Impedance
10 k ohms or greater
Bypass
Buffered bypass
Controls
SOUND knob
TREBLE knob
BASS knob
LEVEL knob
Pedal switch
Indicator
CHECK indicator (Used for indication of check battery)
Connectors
INPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
DC IN jack
Power Supply
Alkaline battery (9 V, 6LR61)
AC adaptor (PSA series: sold separately)
Current Draw
65 mA
Expected battery life under continuous use
Alkaline: Approx. 5.5 hours
*These figures will vary depending on the actual conditions of use.
Accessories
Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information")
Alkaline battery (9 V, 6LR61)
Options (sold separately)
AC adaptor: PSA series
Size and Weight (incl. battery)
Width
73 mm
2-7/8 inches
Depth
129 mm
5-1/8 inches
Height
59 mm
2-3/8 inches
Weight (including battery)
410 g
15 oz
* 0 dBu = 0.775 Vrms
*The specifications are subject to change without notice.
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Support

If you have questions about operating your BOSS product, please check our Knowledge Base for answers to the most common questions.
You can also contact our Product Support department by phone or email.
In addition, we have a library of Owner’s Manuals and Support Documents that you can download and reference.

Owner’s Manuals