OPERATING INSTRUCTIONS POWER AMPLIFIERS AMPLIFIER AUTO SWITCHING MODULE (Optional) FS-7006PA FS-7012PA YA-7000 Thank you for purchasing TOA's Power Amplifiers. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
TABLE OF CONTENTS 1. SAFETY PRECAUTIONS... 3 2. GENERAL DESCRIPTION... 5 3. FEATURES... 5 4. HANDLING PRECAUTIONS... 5 5. INSTALLATION PRECAUTIONS... 6 6. NOMENCLATURE AND FUNCTIONS 6.1. FS-7006PA/7012PA Power Amplifiers Front... 7 Rear... 8 6.2. YA-7000 Amplifier Auto Switching Module (Optional) Front... 9 7. CONNECTIONS 7.1. Speaker Connections... 10 7.2. Volume Control Bypass Control Input Connections... 10 7.3. Mounting and Connecting the YA-7000 7.3.1. YA-7000 Installation... 11 7.3.2. YA-7000 Connections... 12 7.3.3. Checking Amplifier Operation... 14 7.4. Removable Terminal Plug Connection... 15 8. FAILURE INDICATION... 16 9. DIMENSIONAL DIAGRAM... 17 10. BLOCK DIAGRAMS 10.1. FS-7006PA... 18 10.2. FS-7012PA... 19 10.3. YA-7000... 20 11. SPECIFICATIONS 11.1. FS-7006PA/7012PA Power Amplifiers... 21 11.2. YA-7000 Amplifier Auto Switching Module (Optional)... 22 2
1. SAFETY PRECAUTIONS Before installation or use, be sure to carefully read all the instructions in this section for correct and safe operation. Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or cautions regarding safety. After reading, keep this manual handy for future reference. Safety Symbol and Message Conventions Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling. Before operating your product, read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards. WARNING CAUTION Indicates a potentially hazardous situation which, if mishandled, could result in death or serious personal injury. Indicates a potentially hazardous situation which, if mishandled, could result in moderate or minor personal injury, and/or property damage. WARNING When Installing the Unit Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing so may result in fire or electric shock. Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified may result in fire or electric shock. Do not cut, kink, otherwise damage nor modify the power supply cord. In addition, avoid using the power cord in close proximity to heaters, and never place heavy objects -- including the unit itself -- on the power cord, as doing so may result in fire or electric shock. Be sure to replace the unit's terminal cover after connection completion. Because the voltage of up to 100 V is applied to the high impedance speaker terminals, never touch these terminals to avoid electric shock. Avoid installing or mounting the unit in unstable locations, such as on a rickety table or a slanted surface. Doing so may result in the unit falling down and causing personal injury and/or property damage. Install the unit only in a location that can structurally support the weight of the unit and the mounting bracket. Doing otherwise may result in the unit falling down and causing personal injury and/or property damage. Owing to the unit's size and weight, be sure that at least two persons are available to install the unit. Failure to do so could result in personal injury. Tighten each nut and bolt securely. Ensure that the bracket has no loose joints after installation to prevent accidents that could result in personal injury. When the Unit is in Use Should the following irregularity be found during use, immediately switch off the power, disconnect the power supply plug from the AC outlet and contact your nearest TOA dealer. Make no further attempt to operate the unit in this condition as this may cause fire or electric shock. If you detect smoke or a strange smell coming from the unit. If water or any metallic object gets into the unit If the unit falls, or the unit case breaks If the power supply cord is damaged (exposure of the core, disconnection, etc.) If it is malfunctioning (no tone sounds.) 3
WARNING To prevent a fire or electric shock, never open nor remove the unit case as there are high voltage components inside the unit. Refer all servicing to qualified service personnel. Do not place cups, bowls, or other containers of liquid or metallic objects on top of the unit. If they accidentally spill into the unit, this may cause a fire or electric shock. Do not insert nor drop metallic objects or flammable materials in the ventilation slots of the unit's cover, as this may result in fire or electric shock. Do not touch a plug during thunder and lightning, as this may result in electric shock. CAUTION When Installing the Unit Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock. When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself. Operating the unit with a damaged power supply cord may cause a fire or electric shock. When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unit with the power cord connected to the outlet may cause damage to the power cord, resulting in fire or electric shock. When removing the power cord, be sure to hold its plug to pull. Do not block the ventilation slots in the unit's cover. Doing so may cause heat to build up inside the unit and result in fire. Also, periodically clean the ventilation slots of dust. Avoid installing the unit in humid or dusty locations, in locations exposed to the direct sunlight, near the heaters, or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock. When unpacking or moving the unit, be sure to handle it with two or more persons. Falling or dropping the unit may cause personal injury and/or property damage. Be sure to follow the instructions below when rackmounting the unit. Failure to do so may cause a fire or personal injury. Install the equipment rack on a stable, hard floor. Fix it with anchor bolts or take other arrangements to prevent it from falling down. When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to the unit. When the Unit is in Use Make sure that the volume control is set to minimum position before power is switched on. Loud noise produced at high volume when power is switched on can impair hearing. Do not operate the unit for an extended period of time with the sound distorting. This is an indication of a malfunction, which in turn can cause heat to generate and result in a fire. Contact your TOA dealer as to the cleaning. If dust is allowed to accumulate in the unit over a long period of time, a fire or damage to the unit may result. If dust accumulates on the power supply plug or in the wall AC outlet, a fire may result. Clean it periodically. In addition, insert the plug in the wall outlet securely. Switch off the power, and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more. Doing otherwise may cause a fire or electric shock. To avoid electric shocks, be sure to switch off the unit's power when connecting speakers. 4
2. GENERAL DESCRIPTION TOA's FS-7006PA (600 W) and FS-7012PA (1,200 W) are power amplifiers designed for 100 V line and high impedance applications. By mounting an optional YA-7000 module in the power amplifier and connecting it to a standby amplifier, the power amplifier can be automatically switched over to the standby amplifier if the power amplifier fails, allowing broadcasts in progress to continue uninterrupted. 3. FEATURES A built-in limiter circuit limits current flow if there is an electrical overload, and a protection circuit that detects the voltage and current disconnects the output if there is a short circuit. This protection circuit also disconnects the output if the amplifier's internal temperature rises significantly. Front volume control offers convenient output volume adjustment. Control input can bypass the volume control mounted on the front panel to allow "Urgency" announcements to be broadcast at maximum sound volume regardless of volume setting. Continuously variable air-cooling system adjusts fan speed according to the temperature in the amplifier's heat sink. This variability ensures that cooling fan noise is minimized as much as possible under normal usage conditions. 4. HANDLING PRECAUTIONS Keep input cables away from output cables. Installing both cables too close to each other can potentially generate unwanted oscillation. Never connect 2 or more amplifiers to each other through their outputs, as this could cause the amplifiers to fail. To clean, be sure to first switch off the amplifier power, then wipe with a dry cloth. When the amplifier is very dirty, use a cloth moistened in a neutral cleanser. Never use any volatile liquids, such as benzene, thinner, and chemically-treated towels, since the amplifier surface could be damaged. 5
5. INSTALLATION PRECAUTIONS To ensure proper ventilation and prevent excessive heat buildup, position the amplifier so that there is at least 15 cm between the top and the ceiling, and at least 5 cm between the sides and any walls. Allow at least 10 cm behind the amplifier to ensure that the fan air vent in the rear panel does not become obstructed. Over 15 cm Air intake vent Front of amplifier Air exhaust vent Over 5 cm Over 5 cm Over 10 cm When mounting amplifiers in an equipment rack, be sure to space them with perforated panels -- above and below -- that are each at least 1U (44.5 mm) in height, as shown in the figure below. Perforated Panels Power Amplifiers FS-7006PA/7012PA When mounting amplifiers in an equipment rack, allow at least 10 centimeters behind the amplifier to ensure that the fan air vent in the rear panel does not become obstructed. Because the amplifier is heavy (24.8 kg for FS-7006PA, 35.4 kg for FS-7012PA), be sure to reinforce the fittings used to fix the amplifier in place when mounting in a rack and requiring extra strenght. Rack mounting screws are not supplied with the amplifier. Use screws that are appropriate for the specific type of rack used. 6
6. NOMENCLATURE AND FUNCTIONS 6.1. FS-7006PA/7012PA Power Amplifiers [Front] Figure shows the FS-7012PA. 4 5 6 7 8 3 2 1 1. Power Switch Press this switch to turn on the power. To turn off the power, press this switch again. 2. Power Indicator Lights when power is supplied and the FS- 7006PA/7012PA is ready for operation. 3. Volume Control Adjusts the input signal level. This volume control cannot be used while the Bypass Indicator (8) continuously lights. 4. Fill-In Space Write uses of the main and standby amplifiers in this space. 6. Signal Indicator Lights when a signal that exceeds a level 24 db below the rated output is sent to the Speaker Output (11) on the rear panel. 7. Peak Indicator Lights when a signal that exceeds a level of 3 db below the rated output is sent to Speaker Output (11) on the rear panel. 8. Bypass Indicator Lights when the Volume Bypass Control Input (13) on the rear panel is enabled and indicates that the Volume Control (3) has been bypassed and disabled. 5. Fault Indicator Lights when an output muting function* is operated or when a failure is detected. If the YA-7000 is used, this indicator lights when the YA-7000 detects a failure and the power amplifier is switched over to a standby amplifier. (See page 16.) * This function prevents noise from being generated when power is switched on and off. 7
[Rear] Figure shows the FS-7012PA. 9 10 11 12 13 14 9. YA-7000 Receptacle Mount an optional YA-7000 module from this receptacle. (See page 11.) Note Use of the YA-7000 permits the main amplifier to be switched over to a standby amplifier if the main amplifier fails. 10. Power Cord Connect this cord to the wall AC outlet (230 V AC, 50 Hz). 11. Speaker Output Terminal (with cover) High-impedance, 100 V line output for speaker connections. Note Connect this terminal to the YA-7000 when the YA-7000 has been mounted. FS-7006PA M4 screw terminal; barrier distance: 9 mm; load impedance: 16.7 Ω FS-7012PA M4 screw terminal; barrier distance: 9 mm; load impedance: 8.3 Ω 12. Functional Earth Terminal Connect this terminal to the functional earth terminal of external equipment if excessive noise is generated when the power amplifier is connected to the external equipment. This could reduce noise. Note: This terminal is not for protective earth. 13. Volume Control Bypass Control Input Terminal Bypasses Volume Control (3) on the front panel and allows announcements to be made at maximum volume. (Open voltage: under 24 V DC; short-circuit current: under 10 ma; 2P terminal block) 14. Audio Signal Input Terminal 0 db, 10 kω, balanced, 3P terminal block Note Never connect this terminal to the speaker output terminal of other FS-7006PA or FS-7012PA power amplifier. Failure to follow this instruction could lead to equipment failures. 8
6.2. YA-7000 Amplifier Auto Switching Module (Optional) [Front] 1 2 3 4 1. Speaker Output Terminal (with cover) High-impedance, 100V line output for speaker connections. Signals from the Main Amplifier Input (2) are output when the main amplifier (i.e. power amplifier in which the YA-7000 has been mounted) is operating correctly, and signals from the Standby Amplifier Input (3) are output if a main amplifier failure is detected. (M4 screw terminal; barrier distance: 9 mm) Note Never connect this terminal to the speaker output terminal of the FS-7006PA or FS-7012PA power amplifier. Failure to follow this instruction could lead to power amplifier failures. 3. Standby Amplifier Input Terminal (with cover) Connect this terminal to the standby amplifier's speaker output. (M4 screw terminal; barrier distance: 9 mm) Note Only 1 piece of the FS-7006PA or FS-7012PA can be connected to this terminal. Never connect 2 or more units to this terminal, as the excessive load could cause the amplifier to fail. 4. Operation Mode Selector Switch Selects the YA-7000's operation mode. Set this switch to the Normal position in general use. (Default: Normal) 2. Main Amplifier Input Terminal (with cover) Connect the main amplifier's speaker output to this terminal. (M4 screw terminal; barrier distance: 9 mm) Note Only 1 piece of FS-7006PA or FS-7012PA can be connected to this terminal. Never connect 2 or more units to this terminal, as the excessive load could cause the amplifier to fail. 9
7. CONNECTIONS 7.1. Speaker Connections When using the power amplifier without a YA-7000 installed, connect the speakers as follows: Step 1. Switch off the amplifier power. Step 2. Remove the amplifier's speaker output terminal cover. Step 3. Connect the speaker cables to the speaker output terminal. Notes The speaker output terminal is designed for high impedance/100 V line applications. Be sure to connect high-impedance speakers. The total rated power input for the speakers must be less than the amplifier's rated output power. Connecting speakers that exceed the amplifier's rated output power could cause equipment failures. Step 4. Replace the terminal cover. WARNING The TERMINALS marked with the symbol are HAZARDOUS LIVE. The external wiring to these terminals requires installation by an INSTRUCTED PERSON. 100 V line Composite impedance 16.7Ω (FS-7006PA) 8.3Ω (FS-7012PA) FS-7006PA/7012PA Speaker Output Terminal 7.2. Volume Control Bypass Control Input Connections Announcements requiring particular urgency (such as emergency broadcasts) can override the normal volume control on the front of the amplifier in order to be heard at maximum sound volume. To set up this function, connect a switch to the volume control bypass control input, and the broadcast can be output at maximum sound volume as long as the control input is closed. Note Switches used with this function must be the type designed for the withstand voltage of at least 24 V DC and contact capacity of at least 10 ma. Switch FS-7006PA/7012PA Volume Control Bypass Control Input Terminal 10
7.3. Mounting and Connecting the YA-7000 7.3.1. YA-7000 Installation Step 1. Use nippers or a similar tool to remove the amplifier's rear-mounted YA-7000 receptacle panel by cutting away the portions marked with (6 places). Figure shows the FS-7012PA. Step 2. Connect the YA-7000's harness to the amplifier's internal connector. YA-7000 Connector Step 3. Mount the YA-7000 in the power amplifier's rear panel using the 2 supplied M3x6 screws. Machine screws M3 x 6 Operation Mode Selector Switch YA-7000 Step 4. Set the YA-7000's Operation Mode Selector Switch to the Normal position. 11
7.3.2. YA-7000 Connections Power amplifiers installed with the YA-7000 are referred to as "main amplifiers" in this manual. By connecting the YA-7000 to a standby amplifier, the main amplifier can be automatically switched over to the standby amplifier if the main amplifier fails, allowing broadcasts in progress to continue uninterrupted. Notes The speaker output terminal is designed for high impedance/100 V line applications. Be sure to connect high-impedance speakers. The total rated power input for the speakers must be less than the power amplifier's rated output power. Connecting speakers that exceed the amplifier's rated output power could cause equipment failures. Standby amplifiers must be the same type as the main amplifiers, or a type larger than the main amplifier in terms of rated output power. If the standby amplifier's rated output power is smaller than that of the main amplifier, it could be damaged by overload. Standby amplifiers cannot be shared with other main amplifiers. Only 1 piece of FS-7006PA or FS-7012PA can be connected to the YA-7000's main amplifier input and standby amplifier input. Never connect 2 or more amplifiers to each of these terminals, as the excessive load could cause the amplifier to fail. Connections between amplifiers are as shown in the wiring diagram on the following page. WARNING The TERMINALS marked with the symbol are HAZARDOUS LIVE. The external wiring to these terminals requires installation by an INSTRUCTED PERSON. Step 1. Switch off the power amplifier's power. Step 2. Remove all the terminal covers of equipment. Step 3. Connect the main amplifier's Audio signal input terminal to the standby amplifier's Audio signal input terminal. Step 4. Connect the main amplifier's Speaker output terminal to the YA-7000's Main amplifier input terminal. Step 5. Connect the standby amplifier's Speaker output terminal to the YA-7000's Standby amplifier input terminal. Step 6. Connect the speaker cables to the YA-7000's Speaker output terminal. Step 7. Replace the terminal covers. 12
[Wiring Diagram] Speaker Output Terminal 100 V line Composite impedance 16.7Ω (FS-7006PA) 8.3Ω (FS-7012PA) [Main Amplifier] Main Amplifier Input Terminal YA-7000 Standby Amplifier Input Terminal Speaker Output Terminal Audio Signal Input Terminal [Standby Amplifier] Speaker Output Terminal Audio Signal Input Terminal 13
7.3.3. Checking Amplifier Operation Step 1. Shift the YA-7000's Operation mode selector switch to the "TEST" position while making a broadcast. Confirm that even with the switch in this Test position, the broadcast continues and the main amplifier's Fault indicator lights. NORMAL TEST MODE Fault Indicator (lights) YA-7000 Operation Mode Selector Switch Main Amplifier Front Panel Step 2. Shift the YA-7000's Operation mode selector switch back to the "NORMAL" position. Confirm that the main amplifier's Fault indicator extinguishes. Note If the main amplifier's Operation mode selector switch stays set to the "TEST" position, all broadcasts will be made via the standby amplifier but will not be able to continue if the standby amplifier happens to fail. NORMAL TEST MODE Fault Indicator (extinguishes) YA-7000 Operation Mode Selector Switch Main Amplifier Front Panel 14
7.4. Removable Terminal Plug Connection Cautions Avoid soldering cable conductor, as contact resistance may increase when the cable is tightened and the solder is crushed, possibly resulting in an excessive rise in joint temperatures. Use cables of AWG 12 24. Cable end treatment 2-core shielded cable 7 mm 20 mm Connector connections Step 1. Loosen the terminal screw, then insert the cable. Step 2. Retighten the terminal screw. (Pull on the cable to ensure it is securely connected.) 2 Tightens Slotted screwdriver 1 Loosens Terminal screw Shielded cable 1 Removable terminal plug Tip Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm in width 3 mm 15
8. FAILURE INDICATION The power amplifier is equipped with an indicator that alerts the user to equipment failures. When this Fault indicator lights, it is likely that some problem has occurred with the equipment or wiring. When the power indicator remains unlit, it is likely that the power amplifier is not operating correctly. If this happens, first check to be sure that the power is being supplied correctly to the amplifier. If the power indicator remains unlit even when the power is being supplied correctly, it is likely that some problem has occurred inside the equipment. Contact your TOA dealer to arrange for diagnosis and repair. The following causes can be considered when the Fault indicator lights: Symptom Possible Cause Check/Remedy FS-7006PA's or FS-7012PA's Fault indicator lights. Output is not being provided correctly because of a short in the output wiring. Equipment failure or excessive high heat build-up inside the unit. YA-7000's Operation Mode Selector switch was set to "Test" during its installation. Remove the output wiring and turn the power on again. If the Fault indicator light goes out, then the problem may be with the wiring. Check the wiring to determine where the problem may be. If the indicator light does not go out, or if it goes out but then lights again within a short period of time, consider whether the following may be the problem: Check the following points if the indicator automatically goes out within 30 minutes after it has lit. Check installation conditions for appropriate ventilation. Check the connected load capacity for possible overload. Check to see if input and output cables are installed close to each other. If all of the above are found to be in correct working order, then it is likely that the equipment itself is malfunctioning in some way. Equipment failures can also be considered if the indicator lights again within a short period of time even if it has gone out once. Request maintenance and repair action. Set the mode switch to "Normal." 16
9. DIMENSIONAL DIAGRAM Unit: mm The FS-7006PA's external dimensions are identical to those of the FS-7012PA. 482 532.7 465 57.2 37.7 132.6 60 441.2 17
10. BLOCK DIAGRAMS 10.1. FS-7006PA LINE INPUT 0 db 10 kω BALANCE PRE- AMP MIX AMP VOLUME BYPASS CONTROL HEATSINK TEMPERATURE SENSOR THERMOSTAT BYPASS SIGNAL PEAK FAULT POWER YA-7000 (OPTION) POWER AMP UNIT (BUILT-IN CURRENT LIMITER) PROTECTION CIRCUIT POWER ON/OFF MUTE TEMPERATURE DETECTION YA-7000'S FAULT DETECTION SHORT DETECTION FAN CONTROL CIRCUIT SPEED CONTROL POWER FOR POWER AMP UNIT POWER FOR SIGNAL CIRCUIT POWER FOR CONTROL CIRCUIT FAN POWER OT 100 V 70 V 4 Ω H C SPEAKER OUT 100 V C BIAS CONTROL (POWER AMP UNIT) 230 V AC 50 Hz PT RUSH CURRENT CONTROL 18
10.2. FS-7012PA LINE INPUT 0 db 10 kω BALANCE PRE- AMP MIX AMP VOLUME BYPASS CONTROL HEATSINK TEMPERATURE SENSOR THERMOSTAT BYPASS SIGNAL PEAK FAULT POWER YA-7000 (OPTION) POWER AMP UNIT (BUILT-IN CURRENT LIMITER) POWER AMP UNIT (BUILT-IN CURRENT LIMITER) PROTECTION CIRCUIT POWER ON/OFF MUTE TEMPERATURE DETECTION YA-7000'S FAULT DETECTION SHORT DETECTION FAN CONTROL CIRCUIT SPEED CONTROL POWER FOR POWER AMP UNIT POWER FOR SIGNAL CIRCUIT POWER FOR CONTROL CIRCUIT FAN 1 FAN 2 POWER OT 100 V 70 V, 4Ω H C SPEAKER OUT 100 V C BIAS CONTROL (POWER AMP UNIT) CHOKE COIL 230 V AC 50 Hz PT RUSH CURRENT CONTROL 19
10.3. YA-7000 TO FS-7012PA/FS-7006PA PILOT TONE OUT POWER FAULT IN FAULT OUT PILOT TONE IN SPEAKER OUTPUT MAIN AMP INPUT PILOT TONE OSCILLATOR PILOT TONE DETECTOR STANDBY AMP INPUT 20
11. SPECIFICATIONS 11.1. FS-7006PA/7012PA Power Amplifiers Model No. Power Source Power Consumption Input Rated Output Load Impedance Frequency Response Distortion S/N Rated Control Input Indicator Cooling Operating Temperature Operating Humidity Finish Dimensions Weight FS-7006PA FS-7012PA 230 V AC, 50 Hz 1,090 W (1,540 VA) (at rated output), 2,130 W (2,670 VA) (at rated output), 390 W (600 VA) (IEC 65), 750 W (950 VA) (IEC 65), 58 W (110 VA) (at no signal), 58 W (110 VA) (at no signal), 13 W (14 VA) (standby) 13 W (14 VA) (standby) 0 db*, 10 kω, transformer-balanced, removable terminal block (3 pins) 600 W 1,200 W 100 V line, 16.7 Ω, M4 screw terminal, 100 V line, 8.3 Ω, M4 screw terminal, distance between barriers: 9 mm distance between barriers: 9 mm 80 15,000 Hz, within ±3 db (1 khz) Under 0.1% (at 1 khz rated output) Over 90 db, 20 20,000 Hz band pass Volume control bypass control input: no-voltage make contact input, open voltage: Under 24 V DC, short-circuit current: Under 10 ma, removable terminal block (2 pins) Power (green), Signal (green), Peak (red), Fault (red), Bypass (orange) Forced air cooling (Under 50 C: Stop, 50 75 C: Low to high speed (variable), Over 75 C: High speed) 0 C to +40 C Under 90% RH (no condensation) Panel: Aluminum, black, alumite 482 (w) x 132.6 (h) x 532.7 (d) mm 24.8 kg 35.4 kg * 0 db = 1 V Note: The design and specifications are subject to change without notice for improvement. Accessories Terminal cover... 1 Machine screw M4 x 8... 2 Removable terminal plug (2 pins)... 2 Removable terminal plug (3 pins)... 2 21
11.2. YA-7000 Amplifier Auto Switching Module (Optional) Power Source Current Consumption Input Output Detected Fault Indication Operating Temperature Operating Humidity Finish Dimensions Weight 24 V DC (supplied from the power amplifier) 70 ma Main amplifier input: Connects to the main amplifier's output (100 V line), M4 screw terminal, distance between barriers: 9 mm Standby amplifier input: Connects to the standby amplifier's output (100 V line), M4 screw terminal, distance between barriers: 9 mm Connects to the speaker line (100 V line), M4 screw terminal, distance between barriers: 9 mm Power amplifier's fault indicator lights. 0 C to +40 C Under 90% RH (no condensation) Panel: Surface-treated steel plate, black, paint 178 (w) x 61.2 (h) x 73 (d) mm 240 g Note: The design and specifications are subject to change without notice for improvement. Accessories Terminal cover... 1 Machine screw M3 x 6... 2 Machine screw M4 x 8... 2 22
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