Stage right SB12 User manual

SB12 50-watt All-Tube 2-channel 1x12 Guitar Amp Combo
P/N 625914
User's Manual

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SAFETY WARNINGS AND GUIDELINES
Please read this entire manual before using this device, paying extra attention to these
safety warnings and guidelines. Please keep this manual in a safe place for future reference.
•This device is intended for indoor use only.
•Do not expose this device to water or moisture of any kind. Do not place drinks or
other containers with moisture on or near the device. If moisture does get in or on
the device, immediately remove it from its power source and allow it to fully dry
before reapplying power.
•Do not touch the device, the power cord, or any other connected cables with wet
hands.
•Do not expose this device to excessively high temperatures. Do not place it in, on,
or near a heat source, such as a fireplace, stove, radiator, etc. Do not leave it in
direct sunlight.
•Do not place or install this device in an area where it can be exposed to excessive
amounts of dust, humidity, oil, smoke, or combustible vapors.
•Prior to operation, check the unit and power cord for physical damage. Do not use if
physical damage has occurred.
•Before plugging the unit into a power outlet, ensure that the outlet provides the
same type and level of power required by the device.
•This device uses a grounded power cord and requires a ground connection for safe
operation. Ensure that the power source has a proper ground connection. Do not
modify the plug or use a "cheater" plug to bypass the ground connection.
•Disconnect the unit from the power source when replacing the fuse. Replace the
fuse only with one of the types shown in the specifications.
•Unplug this device from the power source when not in use.
•Take care to prevent damage to the power cord. Do not allow it to become
crimped, pinched, walked on, or become tangled with other cords. Ensure that the
power cord does not present a tripping hazard.

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•Never unplug the unit by pulling on the power cord. Always grasp the connector
head or adapter body.
•Ensure that power is turned off and disconnected before making any electrical
connections.
•Clean using a soft, dry cloth only. Do not use chemical cleaners, solvents, or
detergents. For stubborn deposits, moisten the cloth with warm water.
•This device has no user serviceable parts. Do not attempt to open, service, or
modify this device.
CUSTOMER SERVICE
The Monoprice Customer Service department is dedicated to ensuring that your ordering,
purchasing, and delivery experience is second to none. If you have any problem with your
order, please give us an opportunity to make it right. You can contact a Monoprice
Customer Service representative through the Live Chat link on our website
www.monoprice.com or via email at [e-mail]. Check the website for
support times and links.
PACKAGE CONTENTS
Please take an inventory of the package contents to ensure you have all the items listed
below. If anything is missing or damaged, please contact Monoprice Customer Service for a
replacement.
1x SB12 50-watt All-Tube 2-channel 1x12 Guitar Amp Combo
1x AC Power Cord
1x User's Manual

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PRODUCT OVERVIEW
Front Panel
1. INPUT: Two 1/4" jacks for connecting your guitar. The HIGH input has some
additional gain and is primarily intended for use with guitars with passive pickups.
The LOW input has less gain and is primarily intended for use with guitars with
active pickups.
2. DRIVE GAIN: Adjust the overdrive gain for the DRIVE channel. The more GAIN, the
more distortion in the output signal.
3. DRIVE TREBLE: Adjusts the high frequency response for the DRIVE channel.
4. DRIVE MIDDLE: Adjusts the middle frequency response for the DRIVE channel.
5. DRIVE BASS: Adjusts the low frequency response for the DRIVE channel.
6. DRIVE LEVEL: Adjusts the overall output volume level for the DRIVE channel.
7. CH SEL: Switches between the DRIVE and CLEAN channels. The INDICATOR
illuminates red when the DRIVE channel is selected and illuminates green when the
CLEAN channel is selected.
8. CLEAN LEVEL: Adjusts the overall output volume level for the CLEAN channel.
9. CLEAN BRIGHT: Turns high-frequency brightness on or off for the CLEAN channel.
When enabled, the high frequency response is boosted, resulting in "brighter" highs.
10. CLEAN TREBLE: Adjusts the high frequency response for the CLEAN channel.
11. CLEAN MIDDLE: Adjusts the middle frequency response for the CLEAN channel.
12. CLEAN BASS: Adjusts the low frequency response for the CLEAN channel.
13. MASTER REVERB: Adjusts the amount of reverb to add to the overall signal.
14. MASTER VOLUME: Adjusts the volume level of the reverb effect for both channels.

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15. INDICATOR: Illuminates when the amp is powered on. The INDICATOR illuminates
red when the DRIVE channel is selected and illuminates green when the CLEAN
channel is selected.
16. STANDBY: Turns standby mode on or off. Standby mode is a low power mode that
can be used for a limited period of time without risk of overheating or damage.
When standby mode is on, the amplifier keeps the tubes hot and ready for use.
17. POWER: Turns the amplifier on or off.
Rear Panel
18.FUSE HOLDER: Always power off and unplug the amplifier before changing the fuse.
Refer to the SPECIFICATIONS table for the proper fuse types for nominal 120 VAC
and 240 VAC power sources.
19. AC INPUT: IEC 60320 C14 panel connector for connecting the included AC power
cord.
20. SPEAKER OUTPUTS: Three 1/4" jacks for connecting either one 8-ohm speaker, two
16-ohm speakers, or a single 16-ohm speaker.
21. LINE OUT: 1/4" jack that carries the unamplified signal to an external device, such as
a recording device, mixer, or another amplifier.
22. EFFECTS SEND: 1/4" jack for connecting the input of an effects unit.
23. EFFECTS RETURN: 1/4" jack for connecting the output of an effects unit.
24. FOOT SWITCH: 1/4" jack for connecting an optional foot switch (not included),
which can be used to toggle the reverb effect on or off and to switch between the
CLEAN and DRIVE channels.

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SPECIFICATIONS
Model
625914
Type
1x12 Tube Guitar Amplifier Combo
Number of Channels
2
Output Power
50 Watts
Speaker
12" Celestion® Seventy 80
Inputs
2x 1/4" Guitar (High and Low), 1x 1/4" Effects Return,
1x 1/4" Foot Switch
Outputs
3x 1/4" Speaker (1x 8Ω, 2x 16Ω, and 1x 16Ω),
1x 1/4" Line Out, 1x 1/4" Effects Send
Preamp Tubes
3x 12AX7 (V1-V3), 1x 12AT7 (V4)
Power Tubes
2x 6L6G (V5-V6)
Effects
Spring Reverb, Overdrive
EQ
Bass, Middle, Treble
Fuse Types
120 VAC: F3.15A250V, 240 VAC: F1.6A250V
Cabinet Material
MDF and Plywood
Dimensions
22.4" x 10.2" x 20.5"
Weight
51.8 lbs.

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TECHNICAL SUPPORT
Monoprice is pleased to provide free, live, online technical support to assist you with any
questions you may have about installation, setup, troubleshooting, or product
recommendations. If you ever need assistance with your new product, please come online
to talk to one of our friendly and knowledgeable Tech Support Associates. Technical
support is available through the online chat button on our website www.monoprice.com
or through email by sending a message to [e-mail]. Check the website for
support times and links.
REGULATORY COMPLIANCE
Notice for FCC
This device complies with Part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.
Modifying the equipment without Monoprice's authorization may result in the equipment
no longer complying with FCC requirements for Class B digital devices. In that event, your
right to use the equipment may be limited by FCC regulations, and you may be required to
correct any interference to radio or television communications at your own expense.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the

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user is encouraged to try to correct the interference by one or more of the following
measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
Notice for Industry Canada
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Stage Right™, Monoprice™, the Stage Right logo, and all Monoprice logos are trademarks
of Monoprice Inc.
Celestion® is a registered trademark of KEF Celestion Corporation.