Item # DA-250FH CU
DIGITAL POWER AMPLIFIER- 4X 250 W @ 70V- 2X 500 W @ 140V (1U)
- MAP: $1,799.00 / EA
- List Price: $2,227.00 / EA
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Item # DA-250FH CU
DIGITAL POWER AMPLIFIER- 4X 250 W @ 70V- 2X 500 W @ 140V (1U)
- Estimated Weight: 17.0
- Brand: TOA ELECTRONICS
The TOA DA-250FH is a 1U, four-channel Class-D power amplifier engineered for constant-voltage distributed audio. It delivers 250 W x4 at 70 V (19.6 O), with bridge mode available for 500 W x2 at 140 V (39.2 O). Each channel has an independent power section and electronically balanced inputs, with a convenient “CH1-to-All” link for single-source distribution. Performance highlights include 20 Hz–20 kHz frequency response (±1 dB, HPF off), =0.1% THD at 1 kHz, 100 dB S/N (A-weighted), and 70 dB crosstalk. Integrator-friendly touches include recessed level controls with security covers, low-noise constant-speed fans, removable front air filters, stacking capability, tamper-resistant covers, and comprehensive protection (over-current/short, DC, over-temp with per-channel relays and turn-on delay). Power is efficient—~200 W at 1/8 power and 1,200 W at full rated output—and the chassis is 1RU (19" W x 1.7" H x 15.8" D) and 6.6 kg. For galvanic isolation from the 70 V speaker line, add the MT-251H matching transformer (optional). Ideal for BGM, paging, and multi-zone 70 V systems in education, hospitality, transportation, corporate, and worship spaces.
Use Options: 70 V distributed audio in schools/campuses, hotels, retail, offices, transportation hubs, and worship spaces. Multi-zone BGM + paging where compact 1RU footprint, low maintenance (cleanable filters), and CH1-to-All signal linking speed up installs.
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Power Source |
120 V AC, 50/60 Hz |
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Amplification System |
Class D |
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Power Consumption |
200 W (based on UL/CSA standards), 1200 W (rated output 70 V line, 19.6 O × 4) |
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Input |
4 circuits, +4 dB* (1.23 V) (input level control in maximum position),, 10 kO, electronically-balanced, removable terminal block (3 pins), CH 1 mode ON/OFF switch (ON: CH 1 to All ch, OFF: Each ch) |
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Rated Output |
4 channels: 250 W × 4 (70 V line, 19.6 O), 2 channels (BRIDGE): 500 W × 2 (140 V line, 39.2 O), M4 screw terminal, distance between barriers: 8.8 mm |
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Frequency Response |
20 - 20,000 Hz (±1 dB): HPF OFF/50 - 20,000 Hz (-3 dB, +1 dB): HPF ON (selectable with the inner jumper) |
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Total Harmonic Distortion |
0.1% (1 kHz), 0.3% (20 - 20,000Hz): HPF OFF, 0.1% (1 kHz), 0.3% (100 - 20,000 Hz): HPF ON |
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Protection Circuit |
Protection against excessive current flow due to overload, short circuit, unusual DC voltage output, temperature rise at power amp. heat sink (110? or more), temperature rise inside the unit (80? or more) |
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S/N Ratio |
100 dB (A-weighted) |
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Crosstalk |
70 dB (A-weighted) |
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LED Indicator |
Power (blue) × 1, Input (green) × 4, Output (yellow) × 4, Peak (red) × 4, Protect (red) × 4 |
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Cooling |
Forced air cooling |
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Operating Temperature |
-10? to +40? |
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Operating Humidity |
90% RH or less (no condensation) |
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Finish |
Panel: Aluminum, black, alumite Case: Plated steel sheet |
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Dimensions |
482 (W) × 44 (H) × 401.8 (D) mm |
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Weight |
6.6 kg |
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Accessory |
Power cord (2 m) ···1, Removable terminal plug (3 pins) ···4, Tamper-proof cap ···4 |
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Option |
Matching transformer: MT-251H |
Additional Details
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