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Toa A-1706, Operating Instructions Manual, Page: 2 / 12

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TABLE OF CONTENTS

1. SAFETY PRECAUTIONS

............................................................................... 3

2. GENERAL DESCRIPTION 

............................................................................. 4

3. FEATURES 

.......................................................................................................... 4

4. NOMENCLATURE AND FUNCTIONS 

Front ......................................................................................................................... 5

Rear .......................................................................................................................... 5

5. CONNECTIONS

5.1. Speaker Connections ........................................................................................ 7

5.2. Remote Volume Control Connection ................................................................. 7

5.3. Remote Power ON/OFF Control Connection .................................................... 7

5.4. External Equipment Connection 

to the LINE OUT and PWR AMP IN Terminals ................................................. 8

6. FUNCTION SWITCH SETTINGS

................................................................. 8 

7. SPEAKER ZONE SELECTION

..................................................................... 8 

8. INSTALLATION

.................................................................................................. 8 

9. RACK MOUNTING

............................................................................................ 9 

10. CONTROL SETTINGS 

..................................................................................... 9

11. BLOCK DIAGRAM 

........................................................................................... 10 

12. SPECIFICATIONS 

............................................................................................ 11 

Accessories ............................................................................................................. 11 

Optional products .................................................................................................... 11 

13. DIMENSIONAL DIAGRAM 

............................................................................ 12 

Summary of Contents for A-1706

Page 1: ...G INSTRUCTIONS PA AMPLIFIER A 1706 A 1712 A 1724 Please follow the instructions in this manual to obtain the optimum results from this unit We also recommend that you keep this manual handy for future reference ...

Page 2: ...emote Volume Control Connection 7 5 3 Remote Power ON OFF Control Connection 7 5 4 External Equipment Connection to the LINE OUT and PWR AMP IN Terminals 8 6 FUNCTION SWITCH SETTINGS 8 7 SPEAKER ZONE SELECTION 8 8 INSTALLATION 8 9 RACK MOUNTING 9 10 CONTROL SETTINGS 9 11 BLOCK DIAGRAM 10 12 SPECIFICATIONS 11 Accessories 11 Optional products 11 13 DIMENSIONAL DIAGRAM 12 ...

Page 3: ...ic shock Be sure to replace the unit s terminal cover after connection completion Because high voltage is applied to the speaker terminals never touch these terminals to avoid electric shock Be sure to ground to the safety ground earth terminal to avoid electric shock Never ground to a gas pipe as a catastrophic disaster may result Avoid installing or mounting the unit in unstable locations such a...

Page 4: ...e 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 add...

Page 5: ... controls MIC 5 AUX 1 MIC 6 AUX 2 Adjust the microphone or AUX level 5 AUX volume controls AUX 3 5 Adjust the AUX level 6 Bass control Adjusts bass response Rotate clockwise to increase bass output and counterclockwise to reduce it The center position provides flat characteristics 7 Treble control Adjusts treble response Rotate clockwise to increase treble output and counterclockwise to reduce it ...

Page 6: ...l AUX 5 20 dB 10 kΩ unbalanced A combined XLR female phone jack connector Accepts external equipment output signals 19 AUX input terminals AUX 3 4 20 dB 10 kΩ unbalanced Monaural RCA pin jacks Accept external equipment output signals 20 Microphone AUX input terminals MIC 5 AUX 1 MIC 6 AUX 2 60 dB 600 Ω electronically balanced MIC 5 and 6 or 20 dB 600 Ω electronically balanced AUX 1 and 2 Combined ...

Page 7: ...icated in the figures represent the total speaker system load impedances WARNING 5 2 Remote Volume Control Connection REMOTE VOLUME POWER REMOTE H C Volume control 10 kΩ The volume control allows remote adjustment of the post master volume signals When performing the remote volume control adjust the master volume control in advance noting that its setting limits the maximum signal level adjustable...

Page 8: ...t the unit s internal temperature rise 1 2 ON 3 4 5 6 7 8 Switch No Function OFF ON 1 MIC 6 AUX 2 MIC 6 AUX 2 2 MIC 5 AUX 1 MIC 5 AUX 1 3 MIC 6 OFF ON 4 MIC 5 OFF ON 5 MIC 4 OFF ON 6 MIC 3 OFF ON 7 MIC 2 OFF ON 8 MIC 1 OFF ON 5 4 External Equipment Connection to the LINE OUT and PWR AMP IN Terminals A 1700 series Equalizer limiter etc By connecting a signal processor such as an equalizer or limite...

Page 9: ...on when mounting 2 or more units in an equipment rack 10 CONTROL SETTINGS Output levels are adjustable with individual volume controls For music play or announcements adjust the corresponding volume control so that the red indicator doesn t light Note that the sound quality is downgraded when the red indicator remains lit To prevent the accidental change of the settings of input volume and tone Ba...

Page 10: ... switch Power for control section Power for audio section Thermal sensor Fan 240 W only ZONE 2 ZONE 1 ZONE 1 100 V ZONE 2 100 V Zone 2 Zone 1 POWER 220 230 V AC or 240 V AC 50 60 Hz A 1712 and A 1724 only PT Fuse Fuse Output level meter Relay 2 Relay 1 JP OT DIRECT 100 V 4 16 Ω C C REC OUT 0 dB LINE OUT 0 dB 600 Ω PWR AMP IN 600 Ω 0 dB 20 dB 20 dB 20 dB 20 dB 20 dB 20 dB 20 dB 20 dB 20 dB BASS TRE...

Page 11: ...ector key M4 screw terminal 3 DIRECT SPEAKER OUT High impedance 2 100 V line M4 screw terminal 3 Low impedance 4 16 Ω M4 screw terminal 3 Note Both Low and High impedance terminals cannot be used at the same time Phantom Power ON or OFF for each MIC 1 6 with switch setting S N Ratio Over 100 dB Master volume min Band Pass 20 20 000 Hz Over 76 dB Master volume max Over 60 dB MIC 1 MIC 4 Over 53 dB ...

Page 12: ...6 5 18 5 133 12 845 5C URL http www toa jp Traceability Information for Europe EMC directive 2004 108 EC Manufacturer TOA Corporation 7 2 1 Minatojima Nakamachi Chuo ku Kobe Hyogo Japan Authorized representative TOA Electronics Europe GmbH Suederstrasse 282 20537 Hamburg Germany ...

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