| Model | TMA 250.4 | |
| Bridge Mode 8 Ohms | Continuous | 420W x 2 |
| Program / Peak | 500W x 2 / 840W x 2 | |
| Stereo Mode 4 Ohms | Continuous | 220W x 4 |
| Program / Peak | 250W x 4 / 440W x 2 | |
| Stereo Mode 8 Ohms | Continuous | 145W x 4 |
| Program / Peak | 180W x 4 / 360W x 4 | |
| Signal / Noise 20Hz - 20KHz | 90dB | |
| Dimension (cm) | 59.1 x 53.9 x 19.7 | |
| Weight (kg) | 21.73 | |
| Distortion: (SMPTE-IM): | <0.05% | |
| Frequency Response: | 20Hz- 20kHz ±0.1/3dB | |
| Point: | 10Hz- 60kHz | |
| Damping Factor, 1kHz: | >300 a 8 Ohms | |
| Voltage Gain: | 40 (32dB) | |
| Input Sensitivity @ 4 ohms: | 1Vrms | |
| Input clipping: | 10 Vrms (+22dB) | |
| Input Impedance: | 10 Kohms unbalanced, 20 Kohms balanced | |
| Controls: Front: | AC Switch, Ch1 - Ch4 Gain Knobs, Rear: Mode Switchs | |
| Indicators: | Power-On: Blue LED, Protection: Green LED, Limiter : Yellow LED, Clip: Red LED, Parallel-input: Yellow LED | |
| Connectors, each channel: | Input: Terminal Block / Output: Screw-terminal Barrier Block | |
| Cooling: | Continuously variable speed fan, front-to-rear air flow | |
| Load Protection: | On / Off muting, overheat & short circuit protection | |
| Power Supply: | 220-240V (110-120V) AC 50-60Hz | |
