Amplifier, is all kinds of audio equipment in one of the largest family of sound academic conference hall attack put, its main function is weaker after the input signal is amplified audio equipment to produce enough current to push the speakers sound reproduction. In consideration of power, impedance, distortion, dynamic and different scope and control regulation, different on the internal amplifier signal processing circuit design and manufacturing process is also different. First, the constant pressure amplifier with fixed resistance amplifier features: 1. Such constant pressure amplifier power amplifier usually if the rated load voltage is changed, then the power is also undergoing some changes accordingly. For example, multimedia classrooms TO 100V integrated amplifier, 10W speakers connected to the 70V becomes 5W (100V and 70V power difference is doubled). At present such constant pressure amplifier domestic standard 120V, 240V constant pressure standards abroad is 70V, 100V. It requires a certain load of the rated voltage. Constant pressure amplifier to form a plurality of fixed pressure speakers connected in parallel, with the principles of the constant pressure amplifier power ≥ total power of the connected speakers * 1.3 (where 1.3 is redundant, that line losses). Conference Hall of the sound attack release, amplifier, Wuhan intelligent system provided by Wuhan Engineering Co., Ltd. Jiuhua video. Jiuhua Video Engineering Co., Ltd., Wuhan (www.jowa-tech.com) strong, credible, in Wuhan, Hubei control and adjustment equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve Wuhan Jiuhua innovative ideas will lead into the brilliant video and you work for a better future!