Power Stack ST-2 - Guitar amplifier BOSS - Free user manual and instructions

Product Type	Guitar Amplifier (Distortion Pedal)
Brand	BOSS
Model	Power Stack ST-2
Category	Guitar Amplifier
Dimensions	73 x 129 x 59 mm (2-7/8 x 5-1/8 x 2-3/8 inches)
Weight	410 g (15 oz) including battery
Power Supply	Alkaline battery (9 V, 6LR61) or AC Adaptor (PSA series, sold separately)
Current Draw	65 mA
Battery Life	Approx. 5.5 hours (alkaline, continuous use)
Input Impedance	1 MΩ
Output Impedance	1 kΩ
Recommended Load Impedance	10 kΩ or greater
Nominal Input Level	-20 dBu
Nominal Output Level	-20 dBu
Controls	LEVEL, BASS, SOUND, TREBLE knobs; Pedal Switch (effect on/off)
Indicators	CHECK indicator (effect on/off and battery check)
Connectivity	INPUT jack, OUTPUT jack, DC IN jack
Main Features	Produces powerful amp stack distortion; covers classic rock to modern high-gain; responds to guitar volume and picking dynamics
Accessories Included	Leaflet (USING THE UNIT SAFELY, IMPORTANT NOTES, Information), Alkaline battery (9V, 6LR61)
Optional Accessories	AC Adaptor (PSA series)
Safety Notes	Use only specified AC adaptor; handle batteries properly; turn off all devices before connecting

Frequently Asked Questions - Power Stack ST-2 BOSS

How do I power the Power Stack ST-2?

How do I change the battery?

What does the CHECK indicator mean?

What controls are available on the Power Stack ST-2?

How do I connect the Power Stack ST-2?

What type of distortion does it produce?

What are the dimensions and weight?

What is the battery life?

Can I use an AC adaptor and battery simultaneously?

Does the Power Stack ST-2 come with a battery?

USER MANUAL Power Stack ST-2 BOSS

Before using this unit, carefully read the sections entitled: "USING THE UNIT SAFELY" and "IMPORTANT NOTES" (supplied on a separate sheet). After reading, keep the document(s) where it will be available for immediate reference.

Main Features

● This is a distortion effect that produces the powerful sound of a large amp stack.
- It can generate a wide variety of distortion, ranging from classic rock sounds to modern high-gain sounds.
- You can obtain richly expressive guitar sounds by varying your guitar's volume and your picking dynamics.

Panel Descriptions

DC IN jack

Accepts connection of an AC Adaptor (PSA series; optional). By using an AC Adaptor, you can play without being concerned about how much battery power you have left.

* Use only the specified AC adaptor (PSA series; optional), and connect it to an AC outlet of the correct voltage. Do not use any other AC adaptor, since this may cause malfunction.
* If the AC adaptor is connected while power is on, the power supply is drawn from the AC adaptor.
* We recommend that you keep batteries installed in the unit even though you'll be powering it with the AC adaptor. That way, you'll be able to continue a performance even if the cord of the AC adaptor gets accidentally disconnected from the unit.

m = 311

LEVEL knob

Adjusts the volume when the effect is on.

BASS knob

Adjusts the tone quality of the lower range when the effect is on.

OUTPUT jack

Connect this jack to your amp or to the input of another effect unit.

Guitar Amplifier

Pedal switch

This switch turns the effect on/off.

Thumbscrew

When this screw is loosened, the pedal will open, allowing you to change the battery. * For instructions on changing the battery, refer to "Changing the Battery."

CHECK indicator

This indicator shows whether the effect is on or off, and also doubles as the battery check indicator. The indicator lights when the effect is on.

* If you're powering the unit with a battery and the CHECK indicator goes dim—or doesn't light at all—when you try to turn the effect on, the battery is near depletion and should be replaced. For instructions on changing the battery, refer to "Changing the Battery."

SOUND knob

Adjusts the sound character of the distortion and the amount of distortion obtained when the effect is turned on.

TREBLE knob

Adjusts the tone quality of the upper range when the effect is on.

INPUT jack

This jack accepts signals coming from a guitar or other musical instrument, or another effects unit.
* The INPUT jack doubles as the power switch. Power to the unit is turned on when you plug into the INPUT jack; the power is turned off when the cable is unplugged. To prevent unnecessary battery consumption, be sure to disconnect the plug from the INPUT jack when not using the effects unit.

Precautions When Connecting

• To prevent malfunction and equipment failure, always turn down the volume, and turn off all the units before making any connections.
• Do not use connection cables that contain a built-in resistor.
• Raise the amp volume only after turning on the power to all connected devices.
• Once the connections have been completed, turn on power to your various devices in the order specified. By turning on devices in the wrong order, you risk causing malfunction and/or damage to speakers and other devices.
  When powering up: Turn on the power to your guitar amp last. When powering down: Turn off the power to your guitar amp first.
• This unit is equipped with a protection circuit. A brief interval (a few seconds) after power up is required before the unit will operate normally.

Use of Battery

• A battery was installed in the unit before it left the factory. The life of this battery may be limited, however, since its primary purpose was to enable testing.
• If you handle batteries improperly, you risk explosion and fluid leakage. Make sure that you carefully observe all of the items related to batteries that are listed in "USING THE UNIT SAFELY" and "IMPORTANT NOTES" (supplied on a separate sheet).
• When operating on battery power only, the unit's indicator will become dim when battery power gets too low. Replace the battery as soon as possible.
• Batteries should always be installed or replaced before connecting any other devices. This way, you can prevent malfunction and damage.
• The use of an AC adaptor is recommended as the unit's power consumption is relatively high. Should you prefer to use batteries, please use the alkaline type.

Changing the Battery

1. Hold down the pedal and loosen the thumbscrew, then open the pedal upward.
   The pedal can be opened without detaching the thumbscrew completely.
2. Remove the old battery from the battery housing, and remove the snap cord connected to it.
3. Connect the snap cord to the new battery, and place the battery inside the battery housing.
   * Be sure to carefully observe the battery's polarity (+ versus -).
4. Slip the coil spring onto the spring base on the back of the pedal, and then close the pedal.
   * Carefully avoid getting the snap cord caught in the pedal, coil spring, and battery housing.
5. Finally, insert the thumbscrew into the guide bush hole and fasten it securely.

Specifications

Nominal Input Level	-20 dBu
Input Impedance 1 MΩ
Nominal Output Level	-20 dBu
Output Impedance 1 kΩ
Recommended Load Impedance	10 kΩ or greater
Power Supply Alkaline	battery (9 V, 6LR61)AC adaptor (PSA series: sold separately)
Current Draw 65 mA	* Expected battery life under continuous use:Alkaline: 5.5 hoursThese figures will vary depending on the actual conditions of use.
Dimensions 73 (W) x 129 (D) x 59 (H) mm2-7/8 (W) x 5-1/8 (D) x 2-3/8 (H) inches
Weight	410 g / 15 oz (including battery)
Accessories	Leaflet ("USING THE UNIT SAFELY," "IMPORTANT NOTES," and "Information")Alkaline battery (9 V, 6LR61)
Options(sold separately)	AC adaptor (PSA-series)

* 0 dBu = 0.775 Vrms
* This document explains the specifications of the product at the time that the document was issued. For the latest information, refer to the Roland website.