Page 2 - TABLE OF CONTENTS
2 TABLE OF CONTENTS 1. IMPORTANT SAFETY INSTRUCTIONS .................................................... 3 2. SAFETY PRECAUTIONS ............................................................................... 4 3. GENERAL DESCRIPTION ....................................................................
Page 3 - IMPORTANT SAFETY INSTRUCTIONS; FCC REQUIREMENTS
3 1. IMPORTANT SAFETY INSTRUCTIONS • Read these instructions. • Keep these instructions. • Heed all warnings. • Follow all instructions. • Do not use this apparatus near water. • Clean only with dry cloth. • Do not block any ventilation openings. Install in accordance with the manufacturer's instruc...
Page 4 - SAFETY PRECAUTIONS; Safety Symbol and Message Conventions; WARNING
4 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 isspecified may result...
Page 5 - When the Unit is in Use
5 • When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unitwith the power cord connected to the outlet maycause damage to the power cord, resulting in fire orelectric shock. When removing the power cord, besure to hold its plug to pull. • Avoid installing ...
Page 6 - GENERAL DESCRIPTION; HANDLING PRECAUTIONS
6 3. GENERAL DESCRIPTION TOA's DA-250F and DA-250FH Multichannel Power Amplifiers feature high power handling capabilities anddurability. The DA-250F is configured with 250 W x 4 channels (4 Ω output) and 170 W x 4 channels (8 Ω output), and the DA-250FH features a 250 W x 4 channels (70 V line, 19....
Page 7 - CAUTION; INSTALLATION PRECAUTIONS
Rack mounting screws are not supplied with the unit. Be sure to use the screws with a diameter of over 5 mm (0.2") andlength of over 12 mm (0.47") to mount the unit.Failure to do so may cause personal injury. CAUTION 6. INSTALLATION PRECAUTIONS 7 • The supplied power supply cord is designed ...
Page 8 - Input level controls; Note; NOMENCLATURE AND FUNCTIONS
8 1. Power switch [ ON / OFF] Turning this switch on causes the amplifier tofunction, and turning it off causes the amplifier tocease function. Note: The unit is not completely disconnectedfrom the power supply even if this Powerswitch is turned off. 2. Power indicator [POWER] Lights blue when the P...
Page 10 - SETTINGS AND CONNECTIONS; Switch Settings and Speaker Connections
10 Step 1. Turn off this unit's Power switch. Step 2. Set the BRIDGE ON/OFF switches and CH 1 mode ON/OFF switch. Step 3. Connect the sound source equipment to the Input terminals. Note: Refer to p. 12 for the removable terminal plug connection. Step 4. Connect speakers to the Speaker output termina...
Page 12 - Connector connections; Tip; REMOVABLE TERMINAL PLUG CONNECTION; Cautions; Cable end treatment
12 Connector connections Step 1. Loosen the terminal screw, then insert the cable. Step 2. Retighten the terminal screw. (Pull on the cable toensure it is securely connected.) Tip Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm (0.12") in width Tightens Loosens Terminal...
Page 13 - Input sensitivity setting; When a bridge connection is made
13 10. INPUT SENSITIVITY AND HIGH-PASS FILTER ON/OFF SETTINGS The Input sensitivity can be set to +4 dB (factory-preset) or –10 dB for each channel.Besides, only the DA-250FH employs the High-pass filter on each channel, which can be set to "ON" or "OFF." Step 1. Remove this unit's p...
Page 14 - PROTECTION OPERATION LIST
14 11. PROTECTION OPERATION LIST Failure Protection Operation Indicator Remedy Recovery Overcurrent due to overload Current limiter activated when impedance drops below the specified value. Peak indicator lights. Remove overload. Connecting a correct load automatically restores normal operation. Sho...
Page 15 - CLEANING THE FILTER
15 13. 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 2 3 Filter ...
Page 18 - DIMENSIONAL DIAGRAM
18 15. DIMENSIONAL DIAGRAM Unit: mm (inches) 401.8 (15.82) 371 (14.61) 22.5 (0.89) 482 (18.98) 465 (18.31) 442 (17.4) 31.8 (1.25) 44 (1.73)
Page 19 - • Accessories
19 * 0 dB = 0.775 V Note: The design and specifications are subject to change without notice for improvement. Power cord (2 m or 6.56 ft) .................................................. 1Removable terminal plug (3 pins) ........................................ 4Tamper-proof cap .....................