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Table of Contents:

The Front Panel...................................................................................4

The Rear Panel ....................................................................................5

Important Information About Tubes and Tube Products

A Brief History Of The Tube ..........................................................6

Tube Types and Usage................................................................6,7

The Nature of Tubes: Why (and When) to Replace Them .......7,8

The Importance of Proper Biasing................................................8

Survival Tips For Tube Amplifiers ................................................9

System Block Diagram .....................................................................10

Technical Specifications ...................................................back cover

2

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. FOR
PROPER OPERATION, THIS UNIT REQUIRES 3” (75mm) OF WELL VENTILATED SPACE AROUND HEATSINKS AND OTHER AIR
FLOW PROVISIONS IN THE CABINET.

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 OPERATION AND TO AVOID INJURY.

WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK OR FIRE, DO NOT EXPOSE THIS UNIT TO RAIN OR 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.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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.

"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"

EXPLANATION OF GRAPHICAL SYMBOLS:

EXPLICACION DE SIMBOLOS GRAFICOS:

EXPLICATION DES SYMBÔLES GRAPHIQUES:

"DANGEROUS VOLTAGE"

“VOLTAJE PELIGROSO”

"DANGER HAUTE TENSION"

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=

PRECAUCION

RIESGO DE CORRIENTAZO

NO ABRA

PRECAUCION: PARA REDUCIR EL RIESGO DE INCENDIOS O DESCARGAS
ELECTRICAS, NO PERMITA QUE ESTE APARATO QUEDE EXPUESTO A LA
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.

ATTENTION

RISQUE D'ELECTROCUTION

NE PAS OUVRIR

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.

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Summary of Contents for V1512

Page 1: ...U S E R S G U I D E ...

Page 2: ... 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 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXP...

Page 3: ...to operate yet still pro duces incredible sounds Like all St Louis Music amplifiers your V1512 is designed by musicians and built using the finest components available 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 Than...

Page 4: ...4 Treble Use this control to adjust the output level of the high frequen cies This control provides 8dB of cut or boost at 10kHz 5 Mid Use this control to adjust the output level of the middle frequen cies This control provides 9dB of cut or boost at 700Hz 6 Bass Use this control to adjust the output level of the low frequen cies This control provides 12dB of cut or boost at 60Hz 7 Level Use this ...

Page 5: ...y ground connection 12 Speaker Connector The V1512 is shipped with a 1 4 cable connected from the chassis to the internal speaker To connect the amplifier to an external speaker cab inet disconnect the 1 4 plug from the amplifier and use the jack to connect the external cabinet to the amplifier by means of a heavy duty speaker cable terminated with 1 4 plugs The minimum impedance for the external ...

Page 6: ...igned a number of outstanding solid state amplifiers that sound very very good Some use special circuitry which enables them to simulate the distortion characteris tics of a tube amplifier However the tube amplifier still held in the highest esteem by many musicians offers a classic vintage sound in a contemporary market Tube Types And Usage Tube amplifiers are based primarily on two types of tube...

Page 7: ...ses gain starts to hum lacks sensitivity or feels as if it is working against you the preamplifier tubes may need to be replaced The power tubes are subjected to considerably more stress than the preamplifier tubes Consequently they almost always fail degrade first If deteriorating power tubes aren t replaced they will ultimately fail Depending on the failure mode they may even cause severe damage...

Page 8: ...th proper biasing If the bias is set too high overbiased the sound from the amp will be distorted at all levels If the bias is set too low under biased the power tubes will run hot the plates inside the tubes may glow red due to excessive heat and the sound from the amplifier will lack power and punch The excessive heat greatly reduces tube life from a few days to as little as a few hours in extre...

Page 9: ...r replacing the output tubes unless the amplifier is equipped with self biasing circuitry This should be done ONLY at a qualified service center Improper biasing could result in the tubes running too hot which greatly reduces the life of the tubes or too cold which results in dis torted sound regardless of level settings Do not play the amplifier if it exhibits these symptoms get the bias checked ...

Page 10: ...0 V1512 Guitar Amplifier System Block Diagram INPUT TRBL MID BASS GAIN LEVEL 12AX7A V1A 12AX7A V1B 12AX7A V2A 12AX7A V2B REVERB SPEAKER 12AX7A PHASE SPLITTER V3A 12AX7A PHASE SPLITTER V3B EL84 V4 EL84 V5 ...

Page 11: ...e St Louis MO 63133 USA Office Facility 1400 Ferguson Ave St Louis MO 63133 USA Product Type Audio Amplifier Complies with Standards LVD 92 31 EEC 93 68 EEC 73 23 EWG Safety EN60065 EMC EN55013 EN55020 EN55022 EN61000 3 2 EN61000 3 3 Supplementary information provided by your local Sales Services Office or SLM Electronics R D Engineering 1901 Congressional Drive St Louis MO 63146 USA Tel 314 569 0...

Page 12: ...60 Hz SPEAKER SPECS 12 60w 16 ohm 1 75 voice coil diameter 38oz magnet PREAMP TUBES 3 12AX7A POWER AMP TUBES 2 EL84 POWER REQUIREMENTS 120 VAC 60 Hz 70VA 100 115 VAC 50 60 Hz 70VA 230 VAC 50 60 Hz 70VA SIZE AND WEIGHT 18 1 2 W x 16 1 2 H x 9 1 2 D 38 lbs The V1512 is covered with a durable Tolex material wipe it clean with a lint free cloth Never spray cleaning agents onto the cabinet Avoid abrasi...

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