Features: brand new and high quality L12-2 has exceeded thousands of users since 2006, and it all reflects very good. It is a classic model of the L series. Stable and reliable, first-class performance. L-Series amplifiers are strictly measured using a variety of instruments, not on the Internet copy of a variety of brand cottage power amplifier board similar. The L series has undergone years of research and improvement, as well as reliability testing. Please feel free to use it. If the user believes that they are not satisfied after purchasing, for example, the sound is not as good as a DIY kit, they can be refunded unconditionally. This is the only one in the entire network. The spare parts need to be welded by themselves. After the installation is completed, as shown in the figure:Test chart:Input signal -THD+N testWhen the input voltage is 700MV, the output voltage is approximately 8V ohms at 23VPP. Test the following picture: Use an 8Ohm 1000W power resistor. L12-2 Amplifier After class . The rigorously tested high-performance amplifier designed by LJM himself.L12-2 is mainly based on monitoring, ultra-low distortion amplifier.The first thing to note is that the lowest distortion does not mean that it may be the best speaker to listen to.The L12-2 is more suitable for professional users who have a very high level of accuracy and detail. Specifications: Material:Metal Size:19x4.7cm/7.48x1.85in Power = 120W /8R + -50V voltage 200W 4R + -50V voltage THD<0.0005% 1K HZ 10W SR = 35V/US Damping factor >200, 8 ohm load Input Sensitivity = 1.6V Output 120W 8R Frequency Response Range = 15HZ- 50K HZ (-3DB) 20HZx 20K HZ =-0.02 DB Static current = 80MA Voltage Range = for DC Positive + Negative Voltage + -12V to + -55V Voltage magnification = 31 times Package Includes: 2x Audio L12-2 Power Amplifier Kits note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.