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Summary of Contents for Toa DA-250D CE
- Page 1 OPERATING INSTRUCTIONS 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.
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Page 2: Table Of Contents
11. TAMPER-PROOF CAP ATTACHMENT ............ 14 12. CLEANING THE FILTER ................15 13. BLOCK DIAGRAMS 13.1. DA-250D ......................16 13.2. DA-250DH ......................16 14. DIMENSIONAL DIAGRAM ................17 15. SPECIFICATIONS 15.1. DA-250D CE ....................18 15.2. DA-250DH CE ....................19... -
Page 3: Safety Precautions
AC outlet and cord itself. Operating the unit with a damaged contact your nearest TOA dealer. Make no further power supply cord may cause a fire or electric attempt to operate the unit in this condition as this shock. - Page 4 • Contact your TOA dealer as to the cleaning. If dust • To avoid electric shocks, be sure to switch off the is allowed to accumulate in the unit over a long unit's power when connecting speakers.
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Page 5: 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 (40 Ω... -
Page 6: Handling Precautions
4. HANDLING PRECAUTIONS • Keep the input cable away from the output cable. If installed close to each other, oscillation could occur. • To avoid unit failures, never connect outputs of two or more units in parallel. • Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers with a smaller than specified impedance could cause damage to the unit. -
Page 7: Installation Precautions
Do not use them for other racks. CAUTION When installing the unit in a rack other than that of TOA, be sure to use the screws with a diameter of over 5 mm and length of over 12 mm to mount the unit. -
Page 8: 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: Power is switched on and off with each depression of this switch. •... -
Page 9: Rear
[Rear] DA-250D DA-250DH 6. AC inlet 10. CH 1 mode ON/OFF switch [PARALLEL, ON / OFF] Connect the supplied power cord to this inlet. Setting this switch to ON (pressed in) transmits the Channel 1 input signal to both channels 1 7. -
Page 10: 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. Switch off the unit's power. Step 2. Set the BRIDGE ON/OFF switch (DA-250D only) and CH 1 mode ON/OFF switch. Step 3. -
Page 11: 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 CH 1 mode 8 Ω 7.1.2. When using the DA-250DH [2 inputs - 2 outputs] (factory-preset) Speaker output terminals Switch... -
Page 12: 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 13: Input Sensitivity Setting
9. INPUT SENSITIVITY SETTING The input sensitivity for each channel can be set to either +4 dB (factory preset) or –10 dB. CAUTION These servicing instructions are for use by qualified personnel only. To avoid electric shock, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. -
Page 14: Protection Operation List
Abnormal DC Load disconnected. Protection indicator Contact the TOA dealer where the unit was voltage output lights. purchased. 11. 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 15: Cleaning The Filter
12. CLEANING THE FILTER Step 1. Switch off the unit's power. 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 16: 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 17: Dimensional Diagram
14. DIMENSIONAL DIAGRAM Unit: mm... -
Page 18: Specifications
15. SPECIFICATIONS 15.1. DA-250D CE Power Source 220 – 240 V AC, 50/60 Hz Amplification system Digital 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 19: Da-250Dh Ce
15.2. DA-250DH CE Power Source 220 – 240 V AC, 50/60 Hz Amplification system Digital class D Power Consumption 120 W (based on EN standards) 580 W (rated output 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) CH 1 mode ON/OFF switch (ON: PARALLEL, OFF: Each ch) Rated Output... - Page 20 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/ 133-22-126-60...
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