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manual abstract
Thirty one bands cover the frequency spectrum with a control range of ± 12dB on each band. Features • Nominal 1 /3 frequency centers are 20, 25, 32, 40, 50, 63, 80, 100, 125, 160, 200, 250, 320, 400, 500, 630, 800, 1 k, 1.25 k, 1.6k, 2k, 2.5k, 3.2k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k and 20k. The 31 vertical sliders across the front panel move through an indicated range of +12 to -12dB. Center click detents effectively remove any band from the circuit at the OdB position. • The total level can be adjusted without changing the already established equalizing curve. Equalization with a high signal to noise ratio can be achieved accurately and consistently. • Two types of input jacks. Balanced (XLR) and Unbalanced (standard phone) are provided for systems requiring either type of connection. • The input/output switches (for Unbalanced only), the level indicator and the bypass switch make operation simple and precise. • The equalizer is designed to El A standard width of 19"for convenience in rack-mounting. Before Starting • Make sure the line voltage in your area meets the requirements specified on the unit. • Before using the SEQ-331 in a foreign country, check with your local Roland agent for various power requirements you may have. • Plug iti the SEQ-331 before turning on the power switch. Precautions • Do not open this unit. Refer servicing to a qualified repair center. • Unplug this unit when not in use for a long period of time. When unplugging the unit, always grasp the plug. Do not tug by the cord. Avoid placing heavy weights on the power cord. • Avoid using this unit in areas of very high or low temperature. For circuit stability, keep unit away from heaters and coolers. • Avoid using this unit in very dusty or humid places. • Using this unit near neons and flour-escent lights will induce a high level of noise. Changing the angle of this unit in relation to the lights may help reduce this noise. • To clean this unit, wipe with a cloth dampened with a neutral cleanser. Do not use harsh solvents. Connection 2 Direct (Level Selection Switch ©©operate when the standard jack of UNBALANCE is used.) INPUT • Roland Rack System SPH-323 1 High Level Instrument >Audio-equipment (pre-amplifiers, tape decks) LEVEL QdBm OUTPUT •Roland Rack System u-rr t-tr • Audio-equipment (audio-amplifiers, tape decks) • PA, Mixer • Guitar o= LEVEL OdOm 1 Microphone » Low Level Instrument 'Guitar Amplifier, Microphone Amplifier LEVEL □dBm PA, Mixer, Channel Effect Loop Operation ED After making the necessary connections, turn on the power ©and turn off the Bypass Switch © 12 Keeping an eye on the Input Level Indicator©, set the input level with the Input Level Selection Svyitch ® and the output volume of the connected equipment (instrument, pre-amplifier, etc.). *lf the indicator ©lights up, the output signal may be distorted. Hj Level Control ©and Frequency Control ©should be set at the middle (OdB). @3 The Output Level Selection Switch © and the volume of the amplifier, PA, or recording equipments should be adjusted. Start producing sounds. ID Listening to the sound, start the process of equalization with the Frequency Control © . 'Level Control ©can adjust the master level without changing the equalized curve established with the Frequency Control ©. d Within the limits of keeping the Output Level Indicator ©unlit, raise the Level Control ©. *lf the indicator ©lights up, the output signal may be distorted. 13If the volume is to be adjusted again, do so with the control on the connected unit. The operation method for using the Balanced input and output (XLR connector) is in the same order as mentioned above. However, the Input Level Selection Switch® and the Output Level Selection Switch# will not operate. Therefore, the input/ output levels should be adjusted with each connected equipment. Names and Functions of the Controls © Unbalanced Input Jack (standard jack) ‘When this jack is used, the input from the unbalanced input jack ©on the rear panel is automatically cut off. (The input from the Balanced Input Jack ^ will not be cutoff). © Bypass Switch This switch makes the direct connection between instruments, pre-amplifiers, etc. with the stereo amplifiers, PA, and others. "The on-off of the bypass switch will be done mechanically. Therefore there is no relation between the on-off of the power switch. However if the bypass switch is manipulated during performance, a click noise will be produced. © Input Level Indicator © Output Level Indicator Both of these indicators will light up when there is an overload in the level. © Level Control Without moving the equalized curve established by the Frequency Control© knob, the whole level can be moved through a range of ±12dB with this slider. 4 © Frequency Control This slider controls the level of ±12dB for each frequency. Q Power Switch (with an indicator) Rear Panel @ Balanced Input Jack (XLR connector) ® Input Le...