PA3000 is an audio power amplifier designed for sound and vibration applications. It has two identical input/output channels. Each channel consists of power amplifier with two sets of bias resistors for speaker/receiver impedance measurement. This makes loudspeaker measurement simpler and more convenient. PA3000 features balanced input and output， high power, high quality, high reliability and high stability.
The built-in overload protect circuit can automatically protect it against overload, short circuit and overheating. Under these circumstances, signal will be cut off and recovered automatically.
Fig1. PA3000 Power Amplifier
Features
◆ Two channels input and output
◆ Selectable gain for each channel
◆ Selectable reference resistances for each channel
◆ Overload protection circuitry
◆ Power supply 220V &110V
Uses
◆ Driver for loudspeaker, receiver, artificial mouth, etc
◆ Impedance curve test
◆ Power amplifier for audio and vibration analyzer
◆ General-purpose audio power amplifier
Technical parameter
◆ Frequency response (20Hz-100 kHz/1w) ±0.5dB
◆ Phase response (20Hz-100 kHz/1w)+15°-＋20°
◆ Bias resistor（Speaker Resistor Test） 0.25ohm，1ohm
◆ SNR(20Hz-100 kHz/1w) 90dB(A-weighted)
◆ THD/1w < 0.1%
◆ Channel Separation 80dB
◆ Gain control 0dB ~ 25dB
◆ Continuous Output Power 25W（4ohm load）
◆ Max output voltage 11V
◆ Input Impedance 18 kohm
◆ Output Impedance <5 ohm
◆ Power supply AC220V/110V
◆ Dimension 310mm*147mm*51mm
◆ Weight 2.5Kg
Characteristic Curve
Frequency response curve：20Hz-100kHz
THD+N vs Power (0-25watt)
