First, the constant pressure amplifier with a 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. Such as 100V, 10W speakers connected to the 70V becomes 5W (100V and 70V power double the difference). At present such constant pressure amplifier domestic standard 120V, 240V constant pressure standards abroad is 70V, 100V. It requires a certain load rated voltage. Constant pressure amplifier to form a plurality of constant voltage speakers connected in parallel, with the principle of constant pressure amplifier power ≥ total power of the connected speakers * 1.3 (where 1.3 is redundant amplifier brand, that line losses). After the stage is the previous stage to signal amplification sound Used to Yang, the latter level must be enough force to push the speakers. The so-called power amplifier repair enough, does not refer to the louder the more capable force. You must be able to support the entire ensemble scenes without losing detail. Separate front, the rear stage than the combined machine is good, because each has more room to build more sophisticated. And between the two is also less interference, more detail; and, before and after the separate class meeting enthusiasts have more choices driven machine tube amp amplifier, more things to play with. Audio amplifier according to the needs of current consumption, civilian stereo amplifier has the basic shape into two categories, namely pure music amplifier and home theater AV amplifier. Yamaha amplifier, power amplifier, Wuhan Wuhan Jiuhua Jiuhua video provided by the video Engineering Limited. Video Jiuhua Wuhan Engineering Co., Ltd. (www.jowa-tech.com) strong, credible, in Wuhan of control and adjustment equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving Jiuhua Wuhan innovative ideas will lead into the brilliant video and you work for a better future!