Ampeg Bass Amplifier B50R User Manual

							 















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							1892
56743
1. Input accepts a standard 1/4” instrument
plug from your bass.
2. Headphonesallows the connection of a
pair of stereo headphones for private prac-
tice sessions. The internal speaker is dis-
connected whenever headphones are used.
3. Volume controls the overall output level
of the amplifier and the level of the signal at
the Headphones jack (#2).
4. Bassadjusts the output level of the low
frequencies and offers a cut or boost of
12dB at 60Hz.
5. Low Midadjusts the output level of the
lower midrange frequencies and offers a cut
or boost of 11dB at 200Hz.
6. High Midadjusts the output level of the
upper midrange frequencies and offers a cut
or boost of 11dB at 1.2kHz.
7. Trebleadjusts the output level of the high
frequencies and offers a cut or boost of
13dB at 5kHz.8. Power lightindicates the amplifier is
turned on by glowing an iridescent blue
color.
9. Power switchis used to turn the amplifi-
er on and off.
10. Line Out (rear panel, not shown)sup-
plies a mono, unbalanced signal for con-
necting to a mixing console, tape recorder or
external amplifier. (By using a TRS plug the
signal is balanced – tip is “+”, ring is “-”.)
11. Power cord (rear panel, not shown)
connects the amplifier to a suitable source of
A.C. voltage. This is a grounded, three-wire
cord and must be connected to a properly
grounded outlet. DO NOT attempt to
defeat the ground connection of the
power cord!If your amp was purchased
outside of the United States, see the sticker
next to the A.C. connector for its power rat-
ings. Follow the above guidelines.
Thank you for selecting the Ampeg Rocket Bass amplifier. Inspired by the classic Ampeg
bass amps of the sixties, this easy-to-use amplifier represents Ampeg’s quest to provide you
the finest instrument amplification systems available. In order to get the most out of your
new amplifier, please read these instructions before its use.  
						

							THIS EQUIPMENT HAS BEEN
DESIGNED AND  ENGINEERED
TO PROVIDE SAFE AND RELI-
ABLE OPERATION. IN ORDER
TO PROLONG THE LIFE OF THE
UNIT AND PREVENT ACCIDEN-
TAL DAMAGES OR INJURY,
PLEASE FOLLOW THESE PRE-
CAUTIONARY GUIDELINES:
CAUTION:TO REDUCE THE
RISK OF ELECTRIC SHOCK, DO
NOT OPEN CHASSIS; DO NOT
DEFEAT OR REMOVE THE
GROUND PIN OF THE POWER
CORD; CONNECT ONLY TO A
PROPERLY GROUNDED AC
POWER OUTLET.
WARNING:TO REDUCE THE
RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS
EQUIPMENT TO RAIN OR MOIS-
TURE.
CAUTION:NO USER-SERVICE-
ABLE PARTS INSIDE. REFER
SERVICING TO QUALIFIED SER-
VICE PERSONNEL.
CAUTION:OUR AMPLIFIERS
ARE CAPABLE OF PRODUCING
HIGH SOUND PRESSURE LEV-
ELS. CONTINUED EXPOSURE
TO HIGH SOUND PRESSURE
LEVELS CAN CAUSE PERMA-
NENT HEARING IMPAIRMENT
OR LOSS. USER CAUTION IS
ADVISED AND EAR PROTEC-
TION IS RECOMMENDED IF
UNIT IS OPERATED AT HIGH
VOLUME.CAUTIONRISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: 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 DUTILISATION
UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGENEXPLANATION OF GRAPHICAL SYMBOLS:
EXPLICACION DE SIMBOLOS GRAFICOS:
EXPLICATION DES SYMBÔLES GRAPHIQUES:DANGEROUS VOLTAGE
“VOLTAJE PELIGROSO”
DANGER HAUTE TENSION
GEFAHLICHE SPANNUNG==
PRECAUCIONRIESGO DE CORRIENTAZO
NO ABRA
PRECAUCION 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
ATTENTIONRISQUE DELECTROCUTION
NE PAS OUVRIR
ATTENTION: POUR REDUIRE DELECTROCUTION NE PAS
ENLEVER LE COUVERCLE. AUCUNE PIECE INTERNE NEST REPRABLE
PAR LUTILISATEUR. POUR TOUTE REPARATION, SADRESSER A UN
TECHNICIEN QUALIFIE.
VORSICHTELEKTRISCHE SCHLAGGEFAHR
NICHT OFFENEN
VORSICHT: ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT
DEN DECKEL ABENHMEN. INTERNE TEILE KONNEN NICHT VOM
BENUTZER GEWARTET WERDEN. DIE WARTUNG IS QUALIFIZIERTEM
WARTUNGSPERSONAL ZU UBERLASSEN.
ESTE APARATO  HA SIDO  DISE-
NADO Y CONSTRUIDO PARA
PROVEER ANOS DE OPERA-
CION SEGURA Y CONFIABLE.
PARA PROLONGAR LA VIDA DE
ESTA UNIDAD E IMPEDIR
DANOS ACCIDENTALES  POR
FAVOR SIGA ESTAS INSTRUC-
CIONES PREVENTIVAS:
PRECAUCION:PARA DISMINUIR
EL RIESGO DE DESCARGAS
ELECTRICAS: (1) NO ABRA LA
CUBIERTA, (2) NO ES
RECOMENDABLE REMOVER O
DESACTIVAR LA PATA DEL
POLO A TIERRA DEL CABLE  DE
CORRIENTE, CONECTE COR-
RECTAMENTE A UNA TOMA DE
CORRIENTE A TIERRA.
ADVERTENCIA:PARA EVITAR
DESCARGAS EL ECTRICAS O
PELIGRO DE INCENDIO, NO
DEJE ESTE APARATO
EXPUESTO A LA LLUVIA O
HUMEDAD.
PRECAUCION: NO HAY PIEZAS
ADENTRO QUE EL USUARIO
PUEDE REPARAR. DEJE TODO
MANTENIMIENTO A LOS TÉCNI-
COS CALIFICADOS.
PRECAUCION:NUESTROS
AMPLIFICADORES PUEDEN
PRODUCIR NIVELES DE PRE-
SION DE SONIDO ALTO.
EXPOSICION CONTINUADA A
LOS NIVELES DE PRESION DE
SONIDO ALTO PUEDE CAUSA
DANO PERMANENTE A SU
OIDO. ES ACONSEJADO QUE
USE PRECAUCION AL USUARIO
Y ES RECOMENDADO PROTEC-
CION PARA LOS OIDOS SI LA
UNIDAD ES OPERADA A VOLU-
MEN ALTO.CET ÉQUIPEMENT AVAIT ÉTÉ
INVENTÉ ET ARRANGÉ POUR
POURVOIR DES ANNÉES
DUSAGE SAUF ET SÛR.  POUR
PROLONGER LA VIE DE CET
APPAREIL ET POUR EMPÊCHER
LES DOMMAGES ET LES TORTS
ACCIDENTELS, SUIVEZ LES
INSTRUCTIONS DE PRÉCAU-
TION.
AVERTISSEMENT:POUR
RÉDUIRE LES RISQUES DÉLEC-
TROCUTION: (1)  N’OUVREZ
PAS LE CHÂSSIS, (2)  NE PAS
ESSAYER DE SUPPRIMER LA
BROCHE CORRESPONDANT À
LA TERRE.
ATTENTION: POUR RÉDUIRE
LES RISQUES DUN FEU OU
DÉLECTROCUTION, N’EX-
POSEZ PAS LAPPAREIL À LA
PLUIE OU À LA MOITEUR.
ATTENTION:IL NY A PAS
D’ÉLÉMENTS RÉPARABLES
DANS LAPPAREIL.  CONSULTER
UN TECHNICIEN QUALIFIÉ
POUR LES RÉPARATIONS.
ATTENTION:NOS AMPLIFICA-
TEURS SONT CAPABLES DE LA
PRODUCTION DES NIVEAUX DE
SON DUNE HAUTE PRESSION.
LEXPOSITION CONTINUE AUX
CES NIVEAUX PEUT CAUSER
LA SURDITÉ PERMANENTE.  LA
PRUDENCE EST ADVISÉ À UTIL-
ISATEUR ET LA PROTECTION
DES OREILLES EST RECOM-
MANDÉ SI LAPPAREIL EST
UTILISÉ À UN HAUT NIVEAU DE
VOLUME.
The B-50R is covered with a durable Tolex material: wipe it clean with a lint-free cloth. Never
spray cleaning agents onto the cabinet. Avoid abrasive cleansers which could damage the finish.
El B-50R esta cubierto con un material durable Tolex: limpielo con una toalla seca. Nunca rocie
el gabinete con sustancias limpiadoras. Evite usar materiales abrasivos con los cuales
pueda danar el acabado.
Le B-50R est couvert avec «Tolex» un revêtement noir et durable.  Essuyez cette matière avec
une toile propre et sans charpie.  Ne pulvérisez jamais les agents de nettoyage sur lappareil.
Evitez les nettoyeurs abrasifs qui peuvent endommager le «Tolex.» 
						

							Ampeg is proudly Made in America.
©1996 SLM Electronics, 1400 Ferguson Avenue, St. Louis, MO 63133 U.S.A.
B-50R TECHNICAL SPECIFICATIONS:
OUTPUT POWER RATING50 Watts RMS, 8 ohm load, 120 VAC
SIGNAL TO NOISE RATIO76dB Typical
POWER REQUIREMENTSDomestic: 2A, 100/120 VAC, 60 Hz 
Export: 1A, 230 VAC, 50/60 Hz 
GAIN54dB  
BASS±12dB @60Hz
LOW MID±11dB @200Hz
HIGH MID±11dB @1.2kHz
TREBLE±13dB @5kHz
SPEAKER SPECS12”, 50 w, 8 ohm, 1.5” voice coil dia., 30 oz. magnet
SIZE AND WEIGHT18-3/8” W x 20-1/2” H x 12-1/2” D
48 lbs.
Ampeg 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.
Ampeg continuamente desarrolla nuevos productos, así como también mejora los existentes. Por esta razón,
las especifaciones é información incluidos en este manual están sujetos a cambios sin previo aviso.
Ampeg développe continuellement des nouvels produits, ainsi daméliorer ceux qui existe.  Pour cette
raison les spécifications et les informations dans ce manuel peuvent se changer sans préavis.
P/N 47-591-51 • 09/96