Mackie SRM450V2 ตู้ลำโพง

- Sensitivity: Line: +4 dBu (center detent) Mic: -36 dBu

- Maximum Input Level: +22 dBu

- Low-Cut Frequency: 75 Hz, Second-order filter

- Acoustic Contour Equalization: Peaking +3 dB @ 100 Hz +3 dB @ 12 kHz 

- Operating Temperature Range: -10 degrees C to 45 degrees C (14 degrees F to 113 degrees F) 

 Power Amplifiers

Low-Frequency Power Amplifier:

- Rated Power: 300 watts*

- Rated THD: < 0.1%

- Cooling: Convection Extrusion

- Design: Class D, Parametric Servo Feedback 

High-Frequency Power Amplifier:

- Rated Power: 100 watts*

- Rated THD: < 0.1%

- Cooling: Convection Extrusion

- Design: Conventional Class AB

Rated power is continuous RMS wattage into transducer's rated impedance @ 5 kHz for the HF amplifier and @ 500 Hz for the LF amplifier. 

Transducers

Low-Frequency Transducer:

- Diameter: 12 in (300 mm)

- Voice Coil Diameter: 3.0 in (75 mm)

- Sensitivity (1W@1m): 98 dB

- Nominal Impedance: 8 ohms

- Power Handling: 600 Watts, program

- Frequency Range: 45 Hz - 3 kHz

High-Frequency Transducer:

- Diaphragm Diameter: 1.75 in (44.5 mm)

- Diaphragm Material: Heat treated titanium

- Sensitivity (1W@1m): 106 dB

- Nominal Impedance: 8 ohms

- Power Handling: 100 watts, program

- Frequency Range: 1 kHz - 20 kHz

Horn Design:

- Type: Conical and Exponential

- Mouth Size: 12 in (304.8 mm) (W) x 7 in (177.8 mm) (H)

- Throat Diameter: 1 in (25.4 mm)

- Horizontal Coverage: 90 degrees (1 kHz-20 kHz)

- Vertical Coverage: 45 degrees (2.8 kHz-20 kHz)

Line Input Power

- US: 120 VAC, 60Hz

- Recommended Amperage Service: 2.5 amps

Control System Function

- Electronic Crossover

- Phase Alignment

- Equalization

- Parametric Equalization

Safety Features

- Over-Excursion Protection: Second-Order High-Pass Filter

- Thermal Protection: Amplifier shutdown, auto-reset

- Low-Line Voltage Shut Down: 60% Nominal line

- Driver Protection: Independent LF and HF compressors

- Low-Frequency Roll-Off: Dynamic, signal-level dependent

Construction Features

- Basic Design: Asymmetrical Trapezoidal

- Enclosure Alignment: Sixth-Order

- Material: Polypropylene

- Finish: Midnight Blue, textured finish

- Handles: One on each side, one on top

Mounting Methods:

- Integrated mounting points, M10

- Compatible with SPM200 Speaker Pole Mount or any 35MM speaker pole adapter.

- Two each located on each side, top, bottom, and rear of enclosure 

Grille: Perforated metal with weather-resistant coating

Display: LEDs Signal Present, Peak, Power ON, and Thermal

Physical Properties

- Height: 26.0 in (660 mm)

- Width: 15.4 in (390 mm)

- Depth: 14.8 in (376 mm)

- Weight: 40 lbs. (18 kg)