Yamaha XM4180 Owner's Manual - Page 7
Rear Panel (XM4180/XM4080), XLR inputs connectors, Euroblock connectors, HPF switches, MODE switch - amp
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■ Rear Panel (XM4180/XM4080) 13 2 4 6 13 2 4 5 6 78 * The illustration shows model XM4180. 1 XLR inputs connectors These balanced XLR-3-31 type connectors are used to connect input signals. The pins are wired as shown below (IEC 60268). BRIDGED mode In BRIDGED mode, channels A and B operate simultaneously, functioning as a single mono amplifier. (The same applies to the C and D.) Hot Ground Cold * In bridged mode, only the first channel in the pair is active; i.e., channel A of pair A/B, and channel C of pair C/D. Make sure not to input an audio signal to an inactive input terminal. 2 Euroblock connectors These balanced Euroblock connectors are used to connect input signals. 3 HPF switches These switches are used to turn on and off the HPF (High Pass Filter) for channels A-B or C-D. When this is set to 20Hz or 55Hz, frequencies below the respective settings are filtered using a 12 dB/octave high pass filter. 4 MODE switch STEREO mode In STEREO mode, channels A , B, C and D are completely independent. PARALLEL mode In PARALLEL mode, the channel A input signal is sent both to the channel A power amp and the channel B power amp. In this case, loads are automatically connected between the A and B input terminals. (The same applies to the C and D input terminals.) By sending the signal from channels A/B to C/D you can use the unit as a four-channel mono amplifier. Note: When in PARALLEL and BRIDGED modes, input terminals A-B and C-D are shorted automatically. Make sure not to input an audio signal to an inactive input terminal. 5 MONITOR/REMOTE terminals This terminal is used to connect the external device for monitoring or remote control. Refer to "MONITOR/ REMOTE PIN layout" on page 14. 6 SPEAKERS terminals These 5-way binding posts are used to connect speakers. 7 GND terminal If you are having a problem with hum or noise, use this terminal to connect to ground (earth) or to connect to the chassis of a mixer, preamp, or other device in your system. 8 AC IN Connect one plug of the included AC cable to this inlet. Connect the other plug of the AC cable to an AC outlet that meets the power supply conditions printed on the label at the top of the unit. XM4180/XM4080/XH200 Owner's Manual 7 5