Assessments - 4, GPA: 4.3
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The overall volume is set through the use of the master faders. Even though the channel faders offer an additional gain of +10dB, we would recommend that you not exceed the +5dB mark. If the PSX’s main bus gets “overloaded” with too many “high level” input channels, despite its special negative gain structure, the summing amplifier could be driven into clipping. Once you reach a level where some channel faders are set above the 0dB marking, we would recommend you lower the setting of each channel fader by about –5dB and increase the overall output level by elevating the master faders. The proportion of the mix and the overall volume stay the same while the risk of clipping is prohibited. INPUT/MONO 7of32 Since most features of the stereo inputs are virtually identical to those of the monaural inputs, we will not discuss their functions in detail again. Thus, we only point out the differences and ask you to refer to the paragraphs in the first chapter of this owner’s manual. 14. MIC Like their monaural counterparts the stereo input channels of the PSX incorporate extensive circuitry and electronically balanced XLR-type connectors for the connection of low impedance microphones. Whether your setup is more microphone-oriented or you have more line level sound sources to connect, you can always use the full amount of input channels, provided by your PSX. The functioning principles were already discussed in detail in the previous chapter. 15. STEREO INPUT L/MONO R Electronically balanced inputs for the connection of musical instruments with stereo output, like keyboards and drum machines, Electric guitars and basses with an active outputs, as well as all other equivalent sound sources with high level outputs, like additional mixing consoles, FX units, CD players, etc. The stereo LINE input is meant for balanced or unbalanced sources with levels between –20dBu and +30dBu. For the connection of external devices you can use monaural or stereo phone plugs which are in accordance to the diagram below. If the external device is equipped with a balanced output stage, you should preferably use balanced cables and plugs, since this type of connection provides better shielding against HF induction and external noise. In case you want to connect a monaural source to a stereo input channel, plug it into the L/MONO input. The signal gets internally routed to both channels. For further information, please refer to the chapter “INPUT/MONO”. 16. GAIN MIC Rotary control to adjust the MIC inputs’ sensitivity, providing the possibility to optimally match the incoming signals with the mixer’s internal operation level. The MIC GAIN control is only active for the XLR-type connections of the stereo input channels. Adjustment and functioning of these controls are identical to those of the monaural inputs. CAUTION: The MIC GAIN control of an unused microphone input should always be set to its minimal marking. Otherwise the noise of the inactive input is added to the audio signal of the corresponding LINE input, which could lead to unnecessary extra noise at the main output, becoming clearly audible in program breaks. 17. LINE TRIM These rotary controls are used to match the incoming line level signals with the operational level of the PSX. The total adjustment range is 30dB. Unity gain – no amplification (0 dB) – is achieved at the 0dB mark. The control offers a level reduction of the incoming signal by –20dB and an amplification of +20dB. This range is wide enough to allow the connection of most professional, semi professional, and even hi-fi audio sources. For further details on how to adjust the LINE TRIM control, please refer to paragraph 4. GAIN. If you use a keyboard as sound source on one of the stereo inputs, make sure that no split zones or layers with channel separation are activated. Otherwise the stereo channel mapping will appear like it is set on the keyboard and you will not have the opportunity to re-position the sound in the overall stereo image, using the controls of the mixer. The better alternative to connect a keyboard with pre-programmed channel mapping is to use two adjacent monaural input channels, leaving you the option to place the sound in the final mix via PAN controls. One more tip, in case you desperately need another input and all channels of the PSX are already in use: The microphone input and the phone plug-type inputs are electrically separated from each other. Each input is equipped with its own gain control – respectively trim control, providing you with the possibility to connect a LINE level source in addition to a microphone. Of course, the two sources share all other controls. Consequently, separate adjustments are not possible. This option is only meant as a subsidiary function and can be used when there is absolutely no other alternative. INPUT/STEREO 8 of 32 18. EQ SECTION The mixer’s EQ section allows very differentiated shaping of the incoming audio signal within miscellaneous frequency bands...
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