This product circuit and PCB layout originated from Europe and America, LM1875T classic design for Europe and America!Reasonable wiring!Outstanding performance!Since its release in 2007, it has been highly sought after by DIY enthusiasts.Retain all the original wiring, maximize the original performance under the premise of compression of the entire board size!Make it more DIY!At the same time also on the original components to enhance oh!

Performance parameters:Output power: typical 20W (Max. 30W)The speaker impedance: 4 Ω - 8 ΩTotal harmonic distortion: < 0.04%Signal to noise ratio: 105dBFrequency response: 14hz-100khz (maximum range calculated by RC high-low power circuit: 3.29 hz-482.29 kHz)Power supply voltage: recommended ±25V (highest voltage shall not exceed ±30V, full bridge rectification of 18V is 25V)PCB size of engineering drawing is 46.5*37.5mm