User manual ROLAND AC90

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Manual abstract: user guide ROLAND AC90

Detailed instructions for use are in the User's Guide.

[. . . ] Thank you, and congratulations on your choice of the Roland AC-90 Acoustic Chorus. Before using this unit, carefully read the sections entitled: · These sections provide important information concerning the proper operation of the unit. Additionally, in order to feel assured that you have gained a good grasp of every feature provided by your new unit, Owner's manual should be read in its entirety. The manual should be saved and kept on hand as a convenient reference. [. . . ] ⷠEquipped with delay effects that can produce sound with a tonal quality that is soft and tuned specifically for acoustic instruments. ⷠAn optional foot switch can also be used to turn the effects on and off. Equipped with a "folding stand, " which allows you to change the angle of the amp when using it for monitoring purposes. ⷠIncludes a "speaker stand adapter, " which allows you to attach the AC-90 to a speaker stand. This makes using the AC-90 easier when you are performing standing up, and allows you to use the amp as a simple PA. You can use the "Manual settings, " or you can use the "Auto settings, " which provide for the automatic detection of the feedback point. ⷠYou can connect an optional foot switch and use your foot to operate this feature. Setting this to ON modifies the midrange to create a bright tone suitable for strumming chords. This emphasizes brushing sounds, allowing you to strum with a more edgy feeling. This handles balanced input, so you can connect 1/4" phone TRS jacks and XLR-type connectors. Set this to "ON" when connecting mics that require phantom power (condenser mic, etc. Set this to "OFF" when connecting mics that do not require phantom power or other devices. Use the following sequence when connecting mics that require phantom power: 1. Supplying phantom power to mics that do not require it or supplying it to other devices may cause such equipment to malfunction. * To protect the circuitry, all output is muted momentarily after the PHANTOM switch is turned on or off. * Phantom power is supplied only to the XLR connectors for the MIC/LINE channel INPUT. * Noise may be produced if connectors are connected or disconnected while the phantom power is turned on. This switches the input circuitry for either piezo or magnetic pickups, according to the type of pickup on the connected guitar. * Set this to "MAGNETIC" if your guitar has an active pickup equipped with a preamp. Phantom Power Because they have a comparatively wider range and better sound quality than dynamic mics, condenser mics are often used for miking acoustic guitars. Although some condenser mics run off batteries placed within the mic housing, in many cases a type of power supply known as "phantom power" is required. The tone of an acoustic instrument can vary immensely from one instrument to the next. [. . . ] When using the folding stand, always be sure to place it so the AC-90 remains level. ⷠNever place any objects on top of the AC-90 when using the folding stand. By using a speaker stand, you can mount the AC-90 at the optimal height for use as a monitor speaker or simple PA device. The AC-90 is designed to be used only with speaker stands whose dimensions meet the specifications described below. [. . . ]

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