Showing posts with label subwoofer. Show all posts
Showing posts with label subwoofer. Show all posts
Wednesday, April 10, 2013
300W POWER AMPLIFIER FOR SUBWOOFER CIRCUIT DIAGRAM
300W POWER AMPLIFIER FOR SUBWOOFER CIRCUIT DIAGRAM
Continuous power into 8 ohms is typically over 150W (250W for ±70V supplies), and it can be used without additional transistors at full power into an 8 ohm load all day, every day. The additional transistors are only needed if you want to do the same thing into 4 ohms at maximum supply voltage
Although I have shown MJL4281A and MJL4302A output transistors, because they are new most constructors will find that these are not as easy to get as they should be. The alternatives are MJL3281/ MJL1302 or MJL21193/ MJL21194.
Because this amplifier circuit operates in "pure" Class-B (something of a contradiction of terms, I think), the high frequency distortion will be relatively high, and is probably unsuited to high power hi-fi. At the low frequency end of the spectrum, there is lots of negative feedback, and distortion is actually rather good, at about 0.04% up to 1kHz. My initial tests and reports from others indicate that there are no audible artefacts at high frequencies, but the recommendation remains.
Saturday, March 23, 2013
300w Subwoofer Power Amplifier Wiring Diagramskema Rangkaian
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