GA-30RV GA-60RV GA-30RVH O P E R A T I N G INSTRUCTIONS
INTRODUCTION Congratulations on your purchase of a Gibson Super ‘Goldtone’ valve guitar amplifier. Please take a few minutes to read this owners manual so you may fully understand the extensive capabilities of this unit. With a little care your new amplifier should provide you with years of satisfactory service.
FAST TRACK GUIDE AND SWITCH ON SEQUENCE 1. Check that the POWER switch on the rear panel is set to OFF and that the unit has the correct speaker load connected. 2. Connect the unit to an appropriate mains power point with the mains lead provided. We also recommend that the MASTER volume is turned down to zero before switch on or switch off purely to prevent any unwanted noises from being amplified loudly. Switch POWER switch to the STANDBY position. 3.
Preamp select switch This enables the user to switch between PREAMP ONE and PREAMP TWO from the front panel. This can also be switched from the 2-way footswitch provided or by the optional 5-way foot controller. The corresponding LED will light up green for PREAMP ONE and red for PREAMP TWO. It will also light up amber if the 5-way footswitch is used and PREAMP 0NE & TWO are selected. N.B. If the 2-way footswitch is used to switch to CHANNEL 2 this will take priority over the push switch.
Preamp two This channel has been voiced primarily for overdriven tones although the overall sound produced can be altered radically depending on where the different controls are set. Using the BOOST fuction further increases the sonic capabilities. Gain This control adjusts the degree of drive in PREAMP TWO. Due to the design of the highly responsive all valve preamp this allows adjustment of the tone from clean, through crunch, to very dirty, adding the BOOST will then increase the sustain even further.
Power Switch Off/Standby/On This switches the amplifier from OFF to STANDBY mode, where only the valve filament heaters are on, to ON for actual use. This should be used correctly every time the unit is used to prevent problems with valves and to increase their life. Please refer to SWITCH ON SEQUENCE earlier in the manual. After switching of it is recommended, as with all valve amplifiers, that it does not receive any sudden physical shocks while the valves are still hot, i.e. through moving the unit.
Jack Socket - For 2-Way Footswitch (Preamp1/2, Boost on/off) This is a stereo 1/4” jack socket for connection to the supplied two way latching footswitch, that enables the user to footswitch between preamp 1 and 2, and to operate the BOOST function remotely. This can be used as well as the optional five way foot controller if desired, however, due to the 2 way footswitch being a latching type, when switched on it will take priority over any other switch.
The choice of which mode to use will depend on what kind of effects unit is used and what overall effects is desired. But generally if time delay effects are used, such as delay (echo), reverb, chorus, flanging, phasing, etc., then the PARALLEL setting is usually preferred.
Speaker Outputs The GA-30 models have three 1/4” jack sockets for connection to 8Ω or 16Ω loads. The two 8Ω sockets are in parallel. The GA-60 has an additional 4Ω output. On the combo models the two 8Ω outputs are connected to the two internal 16Ω speakers, however other cabinets may be used for different sounds/occasions as desired. When using other extension speaker cabinets the overall effective impedance should be correctly worked out and the appropriate socket(s) used.
There are several methods that are used to bias valve amplifiers, the following is one of the easiest and ensures that the output valves do not draw too much current which can result in thermal runaway. To check or reset bias on currently installed valves:1. Ensure unit is correctly loaded (speaker is connected). Connect to mains, switch on (STANDBY) and allow to warm up for at least one minute. 2. Ensure that the MASTER control is turned to zero and switch from STANDBY to ON. 3.
The above values are a guideline but should be OK for most brands of valves, although the bias point for any amplifier is somewhat subjective. Increasing the values shown may improve the tone but will make the valves run hotter, whereas lower values will increase valve life and reliability. 9. Now insert black probe into V2. The other BIAS ADJUST control should now be adjusted to give a reading on the voltmeter as close to 0mV as possible (+/-1mV). 10.
TECHNICAL SPECIFICATIONS SUPER “GOLDTONE” GA-30RV, 6A-60RV & GA-30RVH Input Impedance 1MΩ, PREAMP SELECT and BOOST SELECT push switches Channel 1 VOLUME, TREBLE, MIDDLE & BASS Channel 2 GAIN, LEVEL, TREBLE, MIDDLE and BASS Reverb Valve driven ACCUTRONICS tray with separate controls for each preamp.
SUPER “GOLDTONE” CABINET Speaker Configuration 2x12” closed back (bottom) + 2x10” open back (top) (2 x Celestion Vintage 30 and 2 x Vintage 10) Individual Speaker Specifications SIZE POWER SENSITIVITY HANDLING (1W @ 1m) RESONANT FREQUENCY FREQUENCY RESPONSE MAGNET WEIGHT Celestion Vintage 30 12” 60W 100dB 70Hz 70Hz-5KHz 50oz Celestion Vintage 10 10” 60W 97dB 80Hz 80Hz-5KHz 27oz Dimensions GA-30RV GA-60RV GA-30RVH SGT cabinet W690mm / H500mm / (~271/4” / 193/4” / 91/2”) W730mm / H500mm /
SAFETY INSTRUCTIONS CONSIGNES DE SECURITE Warning For continued protection against the risk of fire, replace fuses only with fuses of the same type and rating. To reduce the risk of fire or electric shock, do not expose this equipment to rain or moisture. In the event of a suspected malfunction, always refer this equipment to a qualified service engineer. This apparatus must be earthed.
SIKKERHETSANVISNINGER SÄKERHETSFÖRESKRIFTER Advarsel! For å hindre fare for brann må du alltid skifte en røket sikring ut med en av samme type og størrelse. For å redusere faren for brann eller støt må høyttaleren ikke utsettes for regn eller fuktighet. Hvis du har den minste mistanke om feil må høyttaleren repareres av en kvalifisert tekniker. Høyttaleren må jordes. Ledningene har følgende fargekode: Varning För oavbrutet skydd mot brandrisk, byta ut säkringar endast med samma typ av säkring och styrka.
INSTRUÇÕES DE SEGURANÇA ISTRUZIONI PER LA SICUREZZA Aviso Para protecção contÌnua contra o risco de fogo, substitua os fusíveis só com fusíveis do mesmo tipo e taxação. Para reduzir o risco de fogo ou de choque elèctrico, não exponha este equipamaento a chuva ou humidade. No caso de suspeita de mau funcionamento, consulte sempre um mecânico de serviço devidamente qualificado. Este aparelho deve ser ligado à terra.
Ο∆ΗΓΙΕΣ ΑΣΦΑΛΕΙΑΣ Προειδοποιη Για συνεχη προστασία από τον κινδυνο ϕωτιάς, αβτικαταστήστε τις ασϕάλειες µόνο µε αοϕάλειες του ίδιου τύπου και της ίδιας αναλογιας. Για να µειωσετε τον κίνδυνο της ϕωτιάς ή την ηλεκτροπληξία, µην εκτίθετε τον εξοπλισµό στη βροχή ή οτην υγρασία. Σε περίπτωση που υποψιάζεστε κάπιοια δυσλειτουρλία, πάντοτε να παραπέµπετε αυτή τη συσκευή σε καταρτισµένο µηχανικό σέρβις. Η συσκευή αυτή πρέπει να διαθέτει γείωση.
Electar Labs., 1818 Elm Hill Pike, Nashville, Tennessee 37210, USA Phone: 615 871 4500 Fax: 615 889 5509 relations@gibson.com Electar Labs.
