User manual MARSHALL VBA 400 VALVE BASS AMPLIFIER

[. . . ] NEVER attempt to by-pass the fuses or fit ones of the incorrect value. DO NOT attempt to remove the amplifier chassis, there are no user serviceable parts. Refer all servicing to qualified service personnel including replacement of fuses and valves. Servicing is required when the apparatus has been damaged in any way, such as when the power supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally or has been dropped. [. . . ] Treble Controls the high frequencies of the bass guitar tone, making your sound brighter when increased. 7. Conversely reducing the amount of middle in your tone will result in a sharper sound. Introduction VBA stands for Valve Bass Amplifier and who better to make a bass amp powered by valve technology than Marshall Amplification?Over 36 years of designing and manufacturing world renowned high quality valve amps has given us priceless knowledge, experience and insight in the world of valve tone. The VBA400 gives you 400 Watts of Marshall valve power courtesy of 12 valves; 8 6550 power valves, 3 ECC83 classic Marshall pre-amp valves and 1 ECC82 valve. In addition to great tone, the VBA400 combines a number of other exciting and useful features. Situated on the rear panel of the amp is a Tuner Output which allows you to keep a tuner in line at all times (the bass is still plugged into the input on the front panel). Should you want to tune up during a live situation in silence, simply press the Tuner Mute facility button and both the sound to your speakers and to the DI will be cut off. All valve amps need to be connected to a speaker before use and failure to do so will result in serious damage to the amp. To ensure that you do not damage your VBA400 by inadvertently forgetting to plug your amp into a speaker, we have designed the unit so that power cannot be applied internally unless it is connected to a speaker. The VBA400 also features an instant overall tonal re-shaper in the form of a Contour control which has three pre-sets to allow you to dial in three different characters in an instant. 8. Contour 3 position control adjusting the overall tonal voicing of the amplifier. Position 1 tailors the response of the amplifier for smooth low end, restrained lower mids, and mild high end lift, to give the classic vintage valve bass tone. In position 2 the lower mid is made more prominent whilst simultaneously the upper mids are subtly scooped to give a more aggressive, growling quality to the amplifier's tone. Position 3 introduces a gentle overall mid boost for an immediate, cutting, `in your face' tone. 3. Deep The Deep Switch adds a tuned or resonant bass boost to your sound, increasing bottom end thud, without making your tone woolly around the bottom end. 9. Bass Controls the amount of low frequencies or bottom end in your tone. 2 3 ENGLISH ENGLISH 10. Gain The VBA400 is an all valve bass head and as such is ideally suited to creating thick musically overdriven tones or warm clean tones. If you require a clean bass sound turn this control up until your bass just starts to distort and then back it off slightly. If on the other hand you would like a distorted sound, simply turn up the Gain control until the required amount of distortion is achieved. Another tip, for those of you who have got active basses who want a distorted tone, is to try plugging your bass into the Passive Input. This will cause no harm and may provide the sound you are looking for. may give you the sound that you are trying to capture. If you are using a Tuner in-line via item 1 on the rear panel, you should still use one of these inputs to connect your bass. 5. [. . . ] POUR EVITER LES RISQUES DE DECHARGES ELECTRIQUES, NE PAS OUVRIR LE COUVERCLE. CET APPAREIL NE COMPORTE AUCUNE PIECE SUSCEPTIBLE D'ETRE REPAREE PAR VOS SOINS. WARNING!: AVIS!: Made in England by: SEND RETURN NORMAL EARTH LIFT SHOCK HAZARD. TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. [. . . ]