Toa AX-1000A, Руководство по эксплуатации

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6. Final Adjustments
(1) Reset master volume to off.
(2) Reset all input channel volume to settings previously logged or marked.
(3) Set master volume for desired acoustic level. (Do not exceed setting arrived at in 3.(4) above.)
(4) Mixer is ready for use.
General Operating Considerations
The AX-1000A is only one component in a complex acoustic environment which includes the room itself, the
speakers throughout the space, the microphones and cables, the number of mics being used, the power
amplifier(s) and equalizers. In the long run, the sound system's performance depends more on day-to-day
consistency than on any other single factor.
For best results, plan a system so that the inputs to the AX-1000A are consistent. By the same token, make sure
that the system components coming after the AX-1000A are operated in a consistent fashion:
Use the same mics in the same inputs all the time.
Set portable mics in the same spots whenever possible.
Use the same Master Volume setting and system EQ curve all the time.
If the speakers are portable, set them up in the same spots all the time.
Use the same power amplifier setting all the time.
If there will be several people connecting up the mics at different events, make sure they have the base line
settings on hand to begin a session from the same setup every time.
9. Setting Up Input Modules
Choosing Microphones
Any microphone will work with the AX-1000A, but better-quality microphones yield higher gain before feedback.
Omnidirectional microphones are not recommended if feedback is a major concern. The exception: when lavalier
mics are required.
For best results, follow these guidelines:
Use only one model of cardioid (hypercardioid) mic throughout the system, such as TOA Dynamic Mics or
Condenser Mics.
If using only one model of mic is impossible, use the same model of mic in the same channel consistently.
In other words, if different brands of mics are constantly plugged into different inputs, the automatic mixing will not
work as well as it will when each mic is assigned to its own input.
After all, you set each channel's gain to the maximum before feedback with a certain microphone. Because
different mics differ in output level and frequency response, the module Gain and Input Channel Volume settings
will differ. If mics get swapped from input to input without channel volume readjustment, some mics could wind up
with too much gain and feedback can occur. Other channels will not have enough gain (at the module input itself),
and will fail to gate-on consistently.
In addition, matching specific mics to specific inputs means that phantom power can be disabled on channels
using dynamic or battery-powered condenser mics. This increases system reliability by preventing noises which
can occur due to faulty cables or connectors.
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