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DUAL POWER AMPLIFIERS
DA-250D
DA-250DH
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.
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
DA-250D CE
DA-250DH CE
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Summary of Contents for Toa DA-250D CE
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Page 1: 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. 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. -
Page 2: Table Of Contents
10. TAMPER-PROOF CAP ATTACHMENT ............ 11 11. CLEANING THE FILTER ................12 12. DIMENSIONAL DIAGRAM ................12 13. BLOCK DIAGRAMS 13.1. DA-250D ......................13 13.2. DA-250DH ......................13 14. SPECIFICATIONS 14.1. DA-250D CE ....................14 14.2. DA-250DH CE ....................15... -
Page 3: Safety Precautions
AC • When moving the unit, be sure to remove its power outlet and contact your nearest TOA dealer. Make supply cord from the wall outlet. Moving the unit no further attempt to operate the unit in this with the power cord connected to the outlet may condition as this may cause fire or electric shock. -
Page 4: General Description
2. GENERAL DESCRIPTION TOA's DA-250D and DA-250DH Dual Power Amplifiers feature high power handling capabilities and durability. The DA-250D is configured with 250 W x 2 channels (4 Ω output) and 170 W x 2 channels (8 Ω output), and the DA-250DH features a 250 W x 2 channels (100 V line, 40 Ω... -
Page 5: Handling Precautions
The supplied rack-mounting screws can be used for the TOA equipment rack only. Do not use them for other racks. When installing the unit in a rack other than that of TOA, be sure to use CAUTION the screws with a diameter of over 5 mm and length of over 12 mm to mount the unit. -
Page 6: Nomenclature And Functions Front
6. NOMENCLATURE AND FUNCTIONS [Front] DA-250D DA-250DH 5. Indicators [INPUT, OUTPUT, PEAK, PROTECT] 1. Power switch [ ON / OFF] The indicators are as follows from left to right: Turning this switch on causes the amplifier to function, and turning it off causes the amplifier to •... -
Page 7: Rear
[Rear] DA-250D DA-250DH 6. AC inlet 10. CH 1 mode ON/OFF switch Connect the supplied power cord to this inlet. [PARALLEL, ON / OFF] The socket-outlet shall be installed near the Setting this switch to ON transmits the Channel 1 equipment and the plug (disconnecting device) input signal to both channels 1 and 2. -
Page 8: Settings And Connections
7. SETTINGS AND CONNECTIONS BRIDGE ON/OFF switch CH 1 mode ON/OFF switch (DA-250D only) [Rear panel] Speaker output terminals Input terminals (with a terminal cover) Note: The figure shows the DA-250D. Step 1. Turn off this unit's Power switch. Step 2. Set the BRIDGE ON/OFF switch (DA-250D only) and CH 1 mode ON/OFF switch. Step 3. -
Page 9: When Using The Da-250Dh
[1 input - 2 outputs] Speaker output terminals Switch Setting BRIDGE CH 1 mode 4 – 8 Ω 4 – 8 Ω [1 input - 1 output] Speaker output terminals Switch Setting BRIDGE BRIDGE 8 Ω Note Channel 1 input signal is output regardless of the CH1 mode ON/OFF switch setting. -
Page 10: Removable Terminal Plug Connection
8. REMOVABLE TERMINAL PLUG CONNECTION Cautions • Be sure to use shielded cables for audio signal lines. • 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. •... -
Page 11: Protection Operation List
Abnormal DC Load disconnected. Protection indicator Contact the TOA dealer where the unit was voltage output lights. purchased. 10. TAMPER-PROOF CAP ATTACHMENT To protect the input level control from accidental operation, it is recommended to replace the control knob with the supplied tamper-proof cap as illustrated. -
Page 12: Cleaning The Filter
11. CLEANING THE FILTER Step 1. Turn off this unit's Power switch. Step 2. Remove the ventilation panel as shown in 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 Detach the panel by pressing on the left or right side. -
Page 13: Block Diagrams
13. BLOCK DIAGRAMS 13.1. DA-250D CH 1 CH 1 INPUT OUTPUT OUTPUT 1 relay Current Limiter +4 dB Short Detector CH 1 -10 dB input level Protection Circuit control BRIDGE CH 1 sensitivity OUTPUT selection jumper (+4 dB/-10 dB) OUTPUT 2 CH 2 INPUT relay Current Limiter... -
Page 14: Specifications
14. SPECIFICATIONS 14.1. DA-250D CE Power Source 220 – 240 V AC, 50/60 Hz Amplification system Class D Power Consumption 120 W (based on EN standards) 620 W (rated output 4 Ω x 2) 400 W (rated output 8 Ω x 2) Input 2 circuits, +4 dB* (1.23 V, input level control in maximum position),... -
Page 15: Da-250Dh Ce
14.2. DA-250DH CE Power Source 220 – 240 V AC, 50/60 Hz Amplification system Class D Power Consumption 120 W (based on EN standards) 580 W (rated output 100 V line, 40 Ω x 2) Input 2 circuits, +4 dB* (1.23 V, input level control in maximum position), 10 kΩ, electronically-balanced, removable terminal block (3 pins), XLR-3-31 type connector CH 1 mode ON/OFF switch (ON: PARALLEL, OFF: STEREO) - Page 16 Traceability Information for Europe (EMC directive 2004/108/EC) Manufacturer: Authorized representative: TOA Corporation TOA Electronics Europe GmbH 7-2-1, Minatojima Nakamachi, Chuo-ku, Kobe, Hyogo, Suederstrasse 282, 20537 Hamburg, Japan Germany URL: http://www.toa.jp/ 133-22-126-6A...
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