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Toa DA-250D, Operating Instructions Manual

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DUAL POWER AMPLIFIERS

DA-250D CE
DA-250DH CE

DA-250D

DA-250DH

Thank you for purchasing TOA's Dual Power Amplifier. 
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

OPERATING INSTRUCTIONS

An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be
incorporated in the electrical installation of the building. 

Summary of Contents for DA-250D

Page 1: ...l Power Amplifier Please carefully follow the instructions in this manual to ensure long trouble free use of your equipment OPERATING INSTRUCTIONS An all pole mains switch with a contact separation of...

Page 2: ...AND CONNECTIONS 7 1 Switch Settings and Speaker Connections 7 1 1 When using the DA 250D 8 7 1 2 When using the DA 250DH 9 8 REMOVABLE TERMINAL PLUG CONNECTION 10 9 PROTECTION OPERATION LIST 11 10 TA...

Page 3: ...ed 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 no...

Page 4: ...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 Turn off this unit s po...

Page 5: ...e such volatile liquids could deform or discolor the unit 5 INSTALLATION PRECAUTIONS The supplied power supply cord is designed for exclusive use with this unit Never use it with other equipment When...

Page 6: ...vel exceeds about 20 dB Output indicator OUTPUT Lights yellow when an output level exceeds about 1 W at an 8 load DA 250D or 40 load DA 250DH Peak indicator PEAK Lights red when an output signal clips...

Page 7: ...mode Set BRIDGE switch to ON Note Be sure to first turn off the Power switch 1 when changing these switch settings 10 CH 1 mode ON OFF switch PARALLEL ON OFF Setting this switch to ON transmits the Ch...

Page 8: ...utput terminals 4 4 Replace the output terminal cover in place Be sure to replace the unit s terminal cover after connection completion Because high voltage is generated at the speaker output terminal...

Page 9: ...CH1 CH1 CH2 CH2 1 input 2 outputs 2 inputs 2 outputs factory preset 40 40 40 40 Speaker output terminals 8 CH2 CH1 Speaker output terminals Switch BRIDGE CH 1 mode OFF ON Setting 4 8 4 8 CH1 CH1 CH2...

Page 10: ...sens Terminal screw Slotted screwdriver Shielded cable Removable terminal plug Hot Cold Earth 1 1 2 Bit shape 3 mm 8 REMOVABLE TERMINAL PLUG CONNECTION Cautions Be sure to use shielded cables for audi...

Page 11: ...operation Short circuit Current limiter activated Load is disconnected Protection indicator lights Check speakers and lines for short circuit Temperature rise at power amp heat sink over 100 C Load di...

Page 12: ...the figure Step 3 Detach the filter inside the ventilation panel Step 4 Clear the filter of dust Step 5 Replace the filter and ventilation panel Ventilation Panel 2 3 Filter Ventilation Panel Detach...

Page 13: ...uit Current Limiter Short Detector Protection Circuit H H E C C CH 1 INPUT E H H E C C CH 2 INPUT E 13 BLOCK DIAGRAMS 13 1 DA 250D 13 2 DA 250DH PARALLEL switch OUTPUT 1 relay CH 1 OUTPUT CH 2 OUTPUT...

Page 14: ...C temperature rise inside the unit over 80 C 100 dB A weighted 70 dB A weighted Power blue x 1 Input green x 2 Output yellow x 2 Peak red x 2 Protect red x 2 Forced air cooling 10 C to 40 C Under 90 R...

Page 15: ...etween barriers 8 8 mm 50 20 000 Hz 3 dB 1 dB 0 1 1 kHz 0 3 100 20 000 Hz Protection against excessive current flow due to overload short circuit unusual DC voltage output temperature rise at power am...

Page 16: ...raceability 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 Sued...

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