NJW3281/NJW1302 output stage with TLE2071 input 420+ watts 4Ω Power Amp project. скачать в хорошем качестве

NJW3281/NJW1302 output stage with TLE2071 input 420+ watts 4Ω Power Amp project.

Project 63 is another audio power amplifier project, in which a low-noise high-speed JFET input operational amplifier is used at the front-end input stage of the amplifier. The three-stage emitter-follower configured power output stage connected to a ±60VDC power supply, delivers an unclipped power output of about 214 watts into an 8Ω load or more than 420 watts at 4Ω with a THD of 0.00157% as measured by a QA400 audio analyzer. By using four complementary pairs of highly reliable 15A 250V 200W silicon power transistors NJW3281 (NPN) and NJW1302 (PNP), higher power output may be realized especially when connected to very low impedance loads. A very interesting feature of this amplifier project is the combination of the voltage and current negative feedback network connected at the inverting input and the output of the op-amp. The amplifier sounded very powerful with astounding sonic quality –it wanted to rip off the speaker cone of the low-frequency drivers! Listening to several genres from jazz, EDM, classical and rock oldies: it doesn’t matter, you wanted to listen for more and this project does it with ease!