User manual YAMAHA PC2002-2002M

[. . . ] The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED. * This applies only to products distributed by YAMAHA KEMBLE MUSIC (U. K. ) LTD. 2 Precautions · Connect this unit's power cord only to an AC outlet of the type stated in this Owner's Manual or as marked on the unit. Failure to do so is a fire and electrical shock hazard. Do not allow water to enter this unit or allow the unit to become wet. [. . . ] This should be: 10 cm at the sides, 30 cm behind, and 20 cm above. These distances should also be adopted when rackmounting the unit. For normal ventilation during use, remove the rear of the rack or open a ventilation hole. If the airflow is not adequate, the unit will heat up inside and may cause a fire. To mount several of these units in an EIA-compliant rack, refer to the rack mounting instructions on page 11. Use only speaker cables when connecting speakers to amplifier outputs. Using other types of cables is a fire hazard. Do not use this amplifier for any purpose other than driving loudspeakers. XLR-type connectors are wired as follows: pin 1: ground, pin 2: hot (+), and pin 3: cold (­). Using a mobile telephone near this unit may induce noise. If noise occurs, use the telephone away from the unit. Turn the power on to the amplifier after it cools down. 2 SIGNAL indicators These green LED indicators light up when the respective channel's output signal exceeds 2 Vrms. This is equivalent to 1/2 W into 8, 1 W into 4. 3 CLIP indicators These red LED indicators light up when the respective channel's output signal distortion exceeds 1% (i. e. Output signal clipping is usually due to excessive input signal levels. 4 s Rear Panel 1 FILTER CHANNEL B FREQ. 90 50 125 25 150 25 150 50 125 25 30 40 Hz Hz 00 ­dB 0 2 3 4 CHANNEL A FREQ. 90 20 15 10 6 3 25 30 40 00 ­dB 0 20 15 10 6 3 CHANNEL B LOW CUT SUB WOOFER OFF LOW CUT SUB WOOFER OFF STEREO CHANNEL A PARALLEL MODE BRIDGE SPEAKERS B-2 CHANNEL A-2 ­ B-1 CHANNEL A-1 ­ 4-8/CHANNEL (STEREO) + + 4-8/CHANNEL (STEREO) + + ­ ­ INPUT CHANNEL B CHANNEL A CHANNEL B INPUT G CHANNEL A (BRIDGE) (PARALLEL) G (­) (+) 8-16 (BRIDGE) (­) (+) 8-16 (BRIDGE) (BRIDGE) (PARALLEL) 5 6 1 Frequency controls/Filter select switches (CHANNEL A, B) These knobs and sliding switches are used to select a filter type and control the cut-off frequencies respectively. You can select one of the following filter type: LOW CUT SUB WOOFER OFF 2 Volume controls (CHANNEL A, B) These knobs enable you to adjust the output level of Channels A and B in the range between ­ dB and 0 dB. In BRIDGE mode, only the volume control for Channel A is available. 3 STEREO/BRIDGE/PARALLEL switch This slide switch is used to set the amplifier operating mode: STEREO, BRIDGE or PARALLEL. BRIDGE STEREO PARALLEL OFF . . . . . . . . . . . . . . . . . . . . . . . . (The cut-off frequencies for the low pass filter are fixed. ) This setting is suitable when using the unit as an amplifier for a subwoofer. Turns the high pass (low cut) filter on. (The cut-off frequencies are variable. ) If you select "LOW CUT, " you can use the frequency controls to adjust the cut-off frequencies in the range of 25 Hz to 150 Hz. FREQ. 90 50 125 25 150 · STEREO mode In this mode, channels A and B operate independently (as a conventional stereo amp). The CHANNEL A input signal will be output from the CHANNEL A output jacks, and the CHANNEL B input signal will be output from the CHANNEL B output jacks. · BRIDGE mode In this mode, the CHANNEL A input signal will be output from the BRIDGE output jacks. In this case, use the rear panel CHANNEL A volume control to adjust the volume. [. . . ] For Barrier strip: After removing approx. 15 mm of insulation from the ends of the speaker cables, bind the bare ends of the speaker wires in the corresponding speaker terminals and tighten the terminals to securely clamp the wires. Refer to page 6 for speaker porality. 15mm* Power amplifier _+ Fuse Speaker system + _ Use the following formula to determine the fuse capacity according to the speaker's input capacity. Po = I R I = Po/R 2 * Shown actual size. For Five-way binding post: After removing approx. If you mount a single unit on a portable rack, be sure to maintain vent openings on the rear and sides. (Side View) Front FILTER CHANNEL B LOW CUT 40Hz OFF 80Hz OFF (Rear View) Completely open CHANNEL A LOW CUT 40Hz 80Hz 25 30 40 00 ­dB 0 20 15 10 6 3 25 30 40 00 ­dB 0 20 15 10 6 3 Air intake Air exhaust CHANNEL B HIGH CUT 5kHz OFF 10kHz OFF CHANNEL A 100V HIGH CUT 5kHz 10kHz OUTPUT VOLTAGE 70V SPEAKERS CHANNEL B CHANNEL A ­ + + ­ INPUT CHANNEL B CHANNEL A CHANNEL B + ­ INPUT G + CHANNEL A ­ G 70V = 32/CHANNEL 100V = 64/CHANNEL s Fixed Installation Mounting Do not block the vent openings on the rear and sides when you use the power amplifier. More than 10 cm More than 10 cm More than 10 cm Front Front 11 Specifications s General Specifications XS250 Power Output Level (Rated Power) 20 Hz~20 kHz THD+N= 0. 1% 1 kHz THD+N= 0. 1% 1 kHz, 20 ms, no clip Power Bandwidth Total Harmonic Distortion (THD + N) 20 Hz~20 kHz, Half Power Frequency Response Intermodulation distortion (IMD) 60 Hz:7 kHz, 4:1, Half Power Channel Separation Residual Noise SN Ratio Damping Factor Slew Rate 8 full swing Voltage Gain (Vol. [. . . ]