Operating Instruction Manual TOA MIXING CONSOLE Model RX-208, RX-212, RX-216 RX-208 RX-212 RX-216 TOA ELECTRIC CO, LTD KOBE, JAPAN
Contents General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Front Panel, Input Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Front Panel, Output Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Meter Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Description The RX-208, 212 and 216, are mixing consoles with 8, 12 and 16 inputs respectively, 2 program outputs, 2 foldback outputs, and 1 echo output. Each input channel and line output has a balanced, low impedance, transformer-isolated, XLR connector, and an unbalanced, 1/4" jack. Each input channel includes an accessory send/receive jack for inserting a signal processing device into the signal path, and a phantom power ON/OFF switch for permitting use of a condenser microphone.
Front Panel, Input Section Peak Indicator The peak indicator lights if clipping occurs in the pre-amp stage of the corresponding input channel. When the light comes on, an adjustment must be made with the Input Level Selector Switch and/or the Input Trim control. Input Level Selector Switch (INPUT) Selection is made in accordance with the output of the microphone or other equipment connected to each input channel (XLR connector and phone jack).
Front Panel, Output Section FB 1 Volume Control (FB1) This control attenuates the echoreturn signals from the built-in echo or an external echo unit and assigns them to the FB 1 mixing bus. Echo Time Control (T1 DELAY) This control permits continuously variable adjustment of the echo time in either short or long ranges. The short range is from 14m to 40m Regeneration Control (T2 REGEN) The T2 control is provided to adjust the echo pattern (number of repeats) of the internal analog delay.
Meter Panel Program L Output Meter (PGM L) The meter indicates the program L output level. RX-208, RX-212 Graphic Equalizer (EQUALIZATION) Two channel, 1/1 octave graphic equalizer with 9 bands (filters) enables 12dB of boost and attenuation at each center frequency with the "0" position of each filter providing Program R Output Meter (PGM R) The meter indicates the program R output level. FB 1 Output Meter (FB 1) The meter indicates the FB 1 output level. flat response.
Rear Panel (RX-208) RX-208 Accessory Send/Receive Jacks (ACCESSORY 1~8) These jacks are provided as patching points for inserting signal processing equipment such as compressor/limiters, noise gate, etc. An output impedance of the accessory send and an input impedance of the accessory receive are 10k ohms. Both nominal signals levels are 0dB. Please refer to the detailed explanation on page 11.
Rear Panel (RX-212, RX-216) The RX-212 and RX-216 are the same as the RX-208 in functions, except that the RX-212 has 12 input channels and the RX-216 has 16 input channels.
Connection Example Main Speaker Systems (Right) Main Speaker Systems (Left) These XLR connectors are balanced, transformer-isolated, floating and accept low impedance sources of from +10dB to —60dB nominal level. The input level must be adjusted by the input level selector switch and trim control. Dual Power Amplifier Dual Power Amplifier Wireless Tuner Keyboard RX-208 Unbalanced input jacks accept high impedance sources of from —30dB to 0dB nominal level.
Connection Example Main Speaker Systems (Right) 4-way multiple driving RX-216 -9- Main Speaker Systems (Left) 4-way multiple driving STAGE LAYOUT EXAMPLE RX-212 - 10 -
How to use ''channel patching" accessory jack The accessory jack (Tip, Ring, Sleeve) is provided on each input channel to allow insertion of outboard signal processing devices (example: compressor/limiters, noise gate, equalizer, etc.) into the signal path. The jack functions as both an output and an input (Tip=Receive, Ring=Send, Sleeve=Shield). Connection cables for this purpose should be wired as illustrated in Fig. 2.
How to get a good mixing • Before connecting the equipment to the mixing console, check the impedance and level of both. If the impedances and levels do not match, mixing will be very difficult and the S/N ratio will also be adversely affected. • Each input channel of the RX-208, RX-212 and RX-216 is provided with a Trim control. Thorough understanding of the function of a Trim control will make mixing easier.
Channel and Graphic Equalizers Equalization for music The Graphic Equalizer is designed not only for use in preventing feedback and equalizing uneven room frequency response to be flat, but also for equalizing frequency response to your tastes and producing favourable sound for you. Fig. 1 shows each frequency band and its corresponding auditory feeling. Fig. 2 and Table 1 show the relation between each musical instrument and its frequency band. They can be of great help in the equalizer operation.
Channel and Graphic Equalizers Feedback Prevention When the overall gain of a sound system is increased, feedback will occur at frequencies where the system response has peaks. Suppose the system has uneven frequency response like that shown in the following diagram. The frequency at which feedback will occur when gain is increased is about 500Hz. In this case, feedback may be prevented by attenuating levels at 500Hz by 3dB to 5dB with an equalizer.
Input & Output Specifications INPUT SPECIFICATIONS 0dB is referenced to 0.775V RMS. Actual Load Impedance Input For Use With Nominal Input Level (Trim "0" to Trim "–30") Connector Sensitivity* MAX. Before Clip Nominal 50 to 600 ohms –80dB (0.08mV) –60dB (0.78mV) to –30dB (25mV) –60dB (0.78mV) –40dB (7.8mV) to –10dB (250mV) –40dB (7.8mV) –20dB (78mV) to +10dB (2.5V) –40dB (7.8mV) to –10dB (250mV) –20dB (78mV) to +10dB (2.5V) 0dB (775V) to +30dB (25V) 10k ohms –50dB (2.
Characteristic Diagrams Frequency Response Input EQ Characteristics Graphic EQ Characteristics - 16 -
- 17 NUMBER IN PARENTHESES=NOMINAL LOSS OR GAIN IN dB NUMBER IN SQUARE BRACKETS=NOMINAL SIGNAL LEVEL NUMBER IN TRIANSLE=GAIN OF AMPLIFIER IN dB NUMBER IN RECTANGLE—LOSS OF ATTENUATOR IN dB TRANSFORMER AMPLIFIER SWITCH FADER OR LEVEL CONTROL
Level Diagram Dimensional Diagrams RX-208, RX-212 RX-216 The above dimensional diagram is for the RX-212. Overall dimensional of the RX-208 is the same as the RX-212.
TOA ELECTRIC CO., LTD.
