Owner's Guide
for the
CRATTEE
Bass Amplifier
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Bass Amplifier
Congratulations!
You are now the proud owner of the compact but powerful Crate MXB15 Bass Amplifier. Small in size
yet big in performance: the 8” Crate Custom speaker makes the most of the amplifier’s 12 watts of musical
output power. A 4-band rotary EQ and built-in Limiter circuit give you complete control over a wide variety of
sounds. In addition, the front panel headphone and external speaker jacks make this amplifier equally suited
for practicing as well as perfoming in intimate surroundings.
Like all Crate products, your MXB15 is designed by musicians and built using only the best components.
Extensive testing confirms that this amplifier is the absolute best it can be.
In order to get the most out of your new amplifier, we strongly urge you to read the information contained
in this manual before you begin playing.
And thank you for choosing
TABLE OF CONTENTS:
Important Safeguards and Precautions . . . . . . . . . . . . . . . . . . . . .3
The Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4,5
Suggested Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . .back cover
CAUTION
PRECAUCION
ATTENTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RIESGO DE CORRIENTAZO
NO ABRA
RISQUE D'ELECTROCUTION
NE PAS OUVRIR
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOIS-
TURE. TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
PRECAUCION: PARA REDUCIR EL RIESGO DE INCENDIOS
O
DESCARGAS
LA
ATTENTION: PROTÉGEZ CET APPAREIL DE LA PLUIE ET DE L'HUMIDITÉ
AFIN D'ÉVITER TOUT RISQUE D'INCENDIE OU D'ÉLECTROCUTION. POUR
REDUIRE D'ELECTROCUTION NE PAS ENLEVER LE COUVERCLE. AUCUNE
PIECE INTERNE N'EST REPRABLE PAR L'UTILISATEUR. POUR TOUTE
REPARATION, S'ADRESSER A UN TECHNICIEN QUALIFIE.
ELECTRICAS, NO PERMITA QUE ESTE APARATO QUEDE EXPUESTO
A
LLUVIA
O
LA HUMEDAD. PARA DISMINUOIR EL RIESGO DE CORRIENTAZO.
NO ABRA LA CUBIERTA. NO HAY PIEZAS ADENTRO QUE EL USARIO PUEDO
REPARAR DEJE TODO MANTENIMIENTO A LOS TECHNICOS CALIFICADOS.
IMPORTANT SAFETY INSTRUCTIONS
• READ, FOLLOW, HEED, AND KEEP ALL INSTRUCTIONS AND WARNINGS.
• DO NOT OPERATE NEAR ANY HEAT SOURCE AND DO NOT BLOCK ANY VENTILATION OPENINGS ON THIS APPARATUS.
• DO NOT USE THIS APPARATUS NEAR SPLASHING, FALLING, SPRAYING, OR STANDING LIQUIDS.
• CLEAN ONLY WITH LINT-FREE DAMP CLOTH AND DO NOT USE CLEANING AGENTS.
• ONLY CONNECT POWER CORD TO A POLARIZED, SAFETY GROUNDED OUTLET WIRED TO CURRENT ELECTRICAL CODES AND
COMPATIBLE WITH VOLTAGE, POWER, AND FREQUENCY REQUIREMENTS STATED ON THE REAR PANEL OF THE APPARATUS.
• PROTECT THE POWER CORD FROM DAMAGE DUE TO BEING WALKED ON, PINCHED, OR STRAINED.
• UNPLUG THE APPARATUS DURING LIGHTNING STORMS OR WHEN UNUSED FOR LONG PERIODS OF TIME.
• ONLY USE ATTACHMENTS, ACCESSORIES, STANDS, OR BRACKETS SPECIFIED BY THE MANUFACTURER FOR SAFE OPERA-
TION AND TO AVOID INJURY.
• THIS APPARATUS DOES NOT OPERATE NORMALLY AND REQUIRES SERVICE WITH ANY PHYSICAL DAMAGE FROM IMPACT OR
ANY EXPOSURE TO MOISTURE.
• SERVICE MUST BE PERFORMED BY QUALIFIED PERSONNEL.
• OUR AMPLIFIERS ARE CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS. CONTINUED EXPOSURE TO HIGH SOUND
PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS. USER CAUTION IS ADVISED AND EAR PRO-
TECTION IS RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME.
EXPLANATION OF GRAPHICAL SYMBOLS:
EXPLICACION DE SIMBOLOS GRAFICOS:
EXPLICATION DES SYMBÔLES GRAPHIQUES:
"IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL"
“ES NECESARIO QUE EL USUARIO SE REFIERA AL MANUAL DE INSTRUCCIONES.”
"REFERREZ-VOUS AU MANUAL D'UTILISATION"
"DANGEROUS VOLTAGE"
“VOLTAJE PELIGROSO”
"DANGER HAUTE TENSION"
=
=
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Bass Amplifier
Important Safeguards and Precautions:
All Crate products are designed for continuous safe operation. Abiding by the following
rules can help prevent damage to your amplifier, yourself and others.
• The amplifier is equipped with a three-pronged AC power cord. To
reduce the risk of electrical shock, NEVER remove or otherwise attempt
to defeat the ground pin of the power cord.
• Connect the amplifier ONLY to a properly grounded AC outlet of the
proper voltage for your amp.
• Avoid sudden temperature extremes, rain and moisture. Also, avoid
sudden and intense impact. (If the unit has been subjected to any of the
preceding abuses, have it looked at by an authorized service center.)
• Do not expose the unit to splashing or dripping liquid. Do not place liq-
uid filled objects on the unit.
• NEVER set the amplifier on a support that will not bear its weight.
• Always keep the total speaker impedance at or above the rated load.
• Unplug the amplifier before cleaning it. NEVER spray liquid cleaners
onto the amplifier. Wipe it with a slightly dampened, lint-free cloth to
remove dirt and film.
• DO NOT use the amplifier if it has sustained damage to the chassis,
controls, or power cord. Refer the unit to an authorized service center
for inspection.
• Prolonged exposure to high volume levels may cause permanent hear-
ing loss or damage. Such damage is progressive and irreversible!
Declaration Of Conformity
#27, Effective 01-01-2001
Manufacturer’s Name:
Production Facility:
SLM Electronics
11880 Borman Drive, St. Louis, MO 63146, USA
700 Hwy 202 W, Yellville, AR 72687, USA
1400 Ferguson Ave., St. Louis, MO 63133, USA
1400 Ferguson Ave., St. Louis, MO 63133, USA
Production Facility:
Shipping Facility:
Office Facility:
Product Type:
Audio Amplifier
Complies with Standards:
LVD:
Safety:
EMC:
92/31/EEC, 93/68/EEC, & 73/23/EWG
EN60065
EN55013, EN55020, EN55022, EN61000-3-2,
& EN61000-3-3
Supplementary information provided by:
SLM Electronics - R & D Engineering
1901 Congressional Drive, St Louis, MO 63146, USA
Tel.: 314-569-0141, Fax: 314-569-0175
3
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Bass Amplifier
The Front Panel:
1: INPUT: Use this 1/4” jack to connect your guitar to the amplifier by
means of a shielded instrument cable.
2: MASTER GAIN: Use this control to adjust the overall output of the
amplifier.
3: LOW: Use this control to adjust the bass response of the amplifier.
Rotating the control counterclockwise reduces the low frequency output.
Rotating the control clockwise increases the low frequency output. The
Low control provides a range of 15dB of boost or cut at 60Hz. It may be
necessary to reduce the Low frequency output at higher volume levels.
4: LO MID: Use this control to adjust the “thickness” or “fatness” of the
amplifier. Rotating the control counterclockwise reduces the lower middle
frequency output. Rotating the control clockwise increases the lower
middle frequency output. The Low Mid control provides a range of 18dB
of boost or cut at 630Hz.
5: HI MID: Use this control to adjust the clarity and definition of the string
attack. Rotating the control counterclockwise reduces the upper middle
frequency output. Rotating the control clockwise increases the upper
middle frequency output. The High Mid control provides a range of 19dB
of boost or cut at 2kHz.
6: HIGH: Use this control to adjust the high frequency response of the
amplifier. Rotating the control counterclockwise reduces the high fre-
quency output. Rotating the control clockwise increases the high fre-
quency output. The High control provides a range of 27dB of boost or cut
at 10kHz.
4
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Bass Amplifier
7: SPEAKER: Use this jack to connect the amplifier to an external
speaker. The internal speaker is disconnected when this jack is used.
The impedance of the external speaker must be 4 ohms or greater.
WARNING: Do not attempt to use headphones in the Speaker jack!
Permanent hearing damage could result!
8: HEADPHONES: Use this jack to connect headphones to the amplifier.
The internal speaker is disconnected when headphones are used.
CAUTION: To avoid possible damage to your hearing, do not use
headphones for extended periods of time at extremely loud levels.
9: ON LED: This LED illuminates when the amplifier is turned on.
10: POWER: Use this switch to turn the amplifier on (top of the switch
depressed) and off (bottom of the switch depressed).
11: POWER CORD (rear panel, not shown): The grounded power cord
should only be plugged into a grounded power outlet that meets all appli-
cable electrical codes and is compatible with the voltage, power, and fre-
quency requirements stated on the rear panel. Do not attempt to defeat
the safety ground connection.
5
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Bass Amplifier
Suggested Settings:
Clean:
Blues:
Rhythm:
Lead:
6
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Bass Amplifier
System Block Diagram:
7
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Bass Amplifier
MXB15 TECHNICAL SPECIFICATIONS:
Output Power Rating
Maximum Input Signal Accepted
Input Impedance
12 watts RMS @ 5% THD 4 ohms, 120 VAC
15 volts peak-to-peak
25k ohms
Signal to Noise Ratio
72dB
Low Control
15dB Range @ 60Hz
18dB Range @ 630Hz
19dB Range @ 2kHz
27dB Range @ 10kHz
Low Mid Control
High Mid Control
High Control
Power Requirements
120 VAC, 60Hz, 30VA
100/115VAC, 50/60Hz, 30VA
230VAC, 50Hz, 30VA
Speaker Size and Rating
Size and Weight
Crate Custom Design 8”, 15 watts
13” H x 13.5” W x 8.25” D, 15 lbs.
The MXB15 is covered with a durable black Tolex material: wipe it clean with a lint-free cloth.
Never spray cleaning agents onto the cabinet. Avoid abrasive cleansers which would damage the finish.
Crate continually develops new products, as well as improves existing ones. For this reason, the specifications
and information in this manual are subject to change without notice.
@2002 SLM Electronics, a division of St. Louis Music, Inc • 1400 Ferguson Avenue • St. Louis, MO 63133
18-431-01 • 04/02
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