Ampeg Guitar Amplifier R50H User Manual

							 















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R-50H TECHNICAL SPECIFICATIONSOUTPUT POWER RATING50 Watts RMS @ 10 % THD 8 ohm load 120 VACSIGNAL TO NOISE RATIO65dB TypicalPOWER REQUIREMENTSDomestic 100/120 VAC, 60 Hz, 115VA
Export: 100/115 VAC, 50/60 Hz, 115VA
230VAC, 50/60Hz, 115VAGAIN60 dB Clean channel, 95 dB Overdrive channelTREBLE24 dB Range @ 5 kHz Clean channel
24 dB Range @2kHz Overdrive ChannelMID8 dB Range @ 700 HzBASS24 dB Range @ 40 Hz TUBE COMPLEMENTPower Amp: EL34 (2); Preamp: 12AX7A (3)SIZE AND WEIGHT29.75”W x 11.25” H x 9.5”D, 34.2 lbs. 
Specs and other information subject to change without notice.
Ampeg is proudly Made in America. ©1997 SLM Electronics, 1400 Ferguson Avenue,
St. Louis, MO 63133 U.S.A.
P/N 47-277-15 • 02/97
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 NACHSCHLAGEN
EXPLANATION 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 R-50H 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 would damage the finish. 
						

							1. Power switchturns the main power on and
off. Always turn this switch on first, off last.
Turn the Standby switch (#2) on at least 30
seconds after
turning on the Power switch.
2. Standby switchactivates the amplifier when
ready for play. Always turn this switch off
first, on last. Turn the Power switch (#1) on at
least 30 seconds before turning on the
Standby switch.During short breaks of use,
turn the Standby switch off, leaving the Power
switch on. This will help prolong the life of the
amplifier’s tubes.
IMPORTANT!
 PLEASE NOTE:
Always connect the amplifier to
a suitable speaker cabinet and
set the Impedance switch (#18)
to the proper setting BEFORE
turning the amplifier on!3. Power lightindicates the amplifier is turned
on by glowing an iridescent blue color.
4. Channel Selectactivates the clean channel
in the down position and the overdrive channel
in the up position. When a footswitch is con-
nected (see #5), this switch is bypassed and has
no affect.
5. Footswitchallows “remote control” of the
channel selection and reverb on/off. Insert the
stereo 1/4” plug of a two-button footswitch (such
as Ampeg’s AFP-2)  here. The  “tip”  connection
controls channel switching, the “ring” controls
the reverb.
6. Line Inserves as the “return” jack of an effect
loop, when connected to the output jack of a
floor pedal or rack-mounted processor. This jack
can double as a direct-into-the amplifier signal
feed when using the amp as a “slave” or exten-
sion amplifier. 7. Line Outserves as the “send” jack of an
effect loop, when connected to the input jack of
a floor pedal or rack-mounted processor. This
jack can double as a signal output for connect-
ing directly to a house sound console, recording
console, powered monitor or external amplifier.
8. Reverbcontrols the amount of reverberation
applied to both channels. With the control at the
“0” position there is no reverb applied; as the
control is turned towards “10” the amount of
reverb increases accordingly.
9. Mastercontrols the output volume level of the
overdrive channel. This control works with the
Gain control (#14) to produce sounds from
slightly distorted to screaming and everything in
between.
10. Bassadjusts the output level of the low fre-
quencies for both channels. This control offers a
cut or boost of 24dB at 40Hz for both channels.11. Midadjusts the output level of the middle fre-
quencies for both channels. This control offers a
cut or boost of 8dB at 700Hz for both channels.
12. Trebleadjusts the output level of the high
frequency range for both channels. This control
offers a cut or boost of 24dB at 5kHz for the
clean channel, 24dB at 2kHz for the overdrive
channel.
13. Volumecontrols the output level of the clean
channel.
14. Gainsets the amount of overdrive distortion
for the overdrive channel. This control works
along with the Master control (#9).
15. EachInput accepts a standard 1/4” instru-
ment plug from your electric guitar. The right
input is at 0dB level while the left input is padded
6dB to compensate for higher output sources.
CLEAN CHANNEL
BOTH CHANNELS
OVERDRIVE CHANNEL
1
2
4
5
6
7
8
9
10
11
12
13
14
BOTH CHANNELS
3
15
17
18
19
16
MODEL:
SERIAL:
    LINE:         V ~          Hz
WATTS:             MAXR-50H
Q2ZZ650022
120     60  
 
16. Main Speaker jack: Use this jack to connect
the amplifier to your speaker cabinet. Always use
this jack “first” – if using a second cabinet, con-
nect it to the Extension Speaker jack (#17).
17. Ext. Speaker jack:Use this jack to connect
the amplifier to a secondspeaker cabinet –
always use the Main Speaker jack (#16) “first.”
18. Impedance switch:Use this switch to match
the amplifier to the TOTAL impedance of your
speaker cabinet(s). Use the following chart to
determine the total impedance (in parallel):
CABINET NUMBER OF TOTAL
IMPEDANCE CABINETS IMPEDANCE
16 ohms 2 8 ohms
19. AC Line In:Use the supplied power cord to
connect 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 con-
nection of the power cord!See the serial num-
ber label for power ratings. 
THE
FRONT
PANEL:
THE
REAR
PANEL:
IMPORTANT NOTE ABOUT CERTAIN EXPORT UNITS:
In some areas 1/4” speaker jacks are not acceptable
for use on amplifiers capable of high output power
levels. For this reason the Speaker jacks on your
amplifier may resemble the illustration to the right.
Connect the amplifier to your speaker(s) using cables
rated for very high output power, terminated with the
appropriate connectors.