Assessments - 1, GPA: 5
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Handle it with care. 4. Do Not Open the Case or Attempt Repairs or Modifications Yourself This product contains no user-serviceable parts. Refer all maintenance to qualified Yamaha service personnel. Opening the case and/or tampering with the internal circuitry voids the warranty. 5. Always power off before making connections Always turn the power OFF before connecting or disconnecting cables. This is important to prevent damage to the unit itself as well as other connected equipment. 6. Handle Cables Carefully Always plug and unplug cables — including the AC power cord — by gripping the connector, not the cord. 7. Clean With a Soft Dry Cloth Never use solvents such as benzine or thinner to clean the unit.Wipe clean with a soft, dry cloth. 8. Always Use the Correct Power Supply Make sure that the power supply voltage specified on the rear panel matches your local AC mains supply. Also make sure that the AC mains supply can deliver more than enough current to handle all equipment used in your system. MX400 User’s Guide Introduction Introduction n Thank you for purchasing the Yamaha MX400. The MX400 series is designed for easy operation and versatility in a wide range of applications, including PA and installed systems. The MX400 series includes three models; 8 channel, 12 channel, 16 channel, and 24 channel mixers. In order to take full advantage of the MX400’s functionality, please read this manual carefully. Features of the MX400 Each of the mono input channels provides the following functions. • XLR/phone input jacks • 20dB pad switch / continuously variable gain control • 3 band EQ (with variable mid-range frequency) / EQ on/off switch / high pass filter switch • TRS insert jack / direct output • A total of 5 AUX SEND systems (pre . 2, post/pre . 2 (switchable), post . 1) • ODD/EVEN group and stereo assign switch / pan control • Channel ON switch • PFL switch • Level meter for accurate level control In addition to the mono input channels, 4 sets of stereo input channels are provided, with the following functions. • Four stereo inputs with 2 band EQ • GROUP/AUX/STEREO assign switches • Balance/pan control • TRS 1/4” phone jack and RCA input jack select switch (only for stereo input 1/2) The master section provides the following features. • Five fader-style AUX SEND controls • Independent 3 point level meter for each AUX SEND control • TO ST switch and pan control for each GROUP • GROUP ON switch, AFL switch, and 100 mm fader for each GROUP • The MONI/ST2 switch allows the ST2/MONI OUT output signal to be switched in the following two ways; 1) One of the signals from an external source input to the stereo bus, the PFL bus, or the 2TR IN. 2) The same signal as the ST1 OUT output signal. • ON switch, L+R switch, and fader are provided for the ST2/MONI OUT output signal. In addition, the following functions are provided. • XLR mic inputs • Talkback level control • Assign switch The TAPE IN jacks and REC OUT jacks have level controls, for convenience when you need additional margin for monitoring or recording. The level meters with peak indicators allow accurate monitoring. MX400 User’s Guide Front and rear panels Front and rear panels s A B 20dB GAIN –16 –60 HIGH –15 +15 MID FREQ 250 5K MID –15 +15 LOW –15 +15 AUX 1 0 10 AUX 2 0 10 AUX 3 0 10 AUX 4 0 10 P R E PRE EQ 80 PEAK SIGNAL 1 Input modules 2 1A/B switch This switch selects the signal source of the input module. 3 Select INPUT A (XLR type) or INPUT B (1/4” phone type). 220dB pad switch 4 This is a 20dB input pad (attenuator) that affects INPUT A and INPUT B. If the level of the input signal is too high for adjustments to be made using 5 the GAIN control alone, use the pad to attenuate the signal to an appropriate level. The pad is on when this switch is pressed in. 3GAIN control This controls the gain of the preamp for INPUT A and INPUT B. Gain is variable to a maximum of 44dB. The GAIN control is always used in conjunction with the SIGNAL indicator and the PEAK indicator. Adjust the GAIN control so that the SIGNAL indi 6 cator is always lit when an input signal is present, and the PEAK indicator lights occasionally. If the PEAK indicator lights frequently, lower the GAIN control to prevent the signal from distorting.The following table shows usual settings for the GAIN control. Signal source GAIN control position 20dB pad switch Dynamic mic (low level) –60 ~ –50 –16 GAIN –60 off Condenser mic (high level) –35 –16 –60GAIN off Audio device, electronic musical instrument (low level) –20 –16 –60GAIN off Audio device, electronic musical instrument (high level) +4 –16 –60GAIN on 7 4SIGNAL indicator and PEAK indicator When the post EQ signal level (nominal level 0dB) reaches –10dB, the SIG NAL indicator will light. This indicator indicates that a signal is being input. When the post EQ signal level reaches 3dB before clipping level, the PEAK indicator will light. This indicator indicates that the signal has approached clipping level. Set the signal level base...
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