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DIY For Audio
Small amplifier circuit board help
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<blockquote data-quote="Henry" data-source="post: 431084" data-attributes="member: 14394"><p>Lots and lots of amplifier PCBs, or complete kits available on eBay from various Chinese sellers. </p><p></p><p>Op Amp: Integrated circuit containing a operation amplifier. Does small signal voltage amplification and buffering(?). Mostly used in pre-amp circuits. Replaces a lot of small signal transistors in a small package.</p><p></p><p>Pre-Amp: Part of the amplifier (sometimes in separate case) that does input switching and sometimes voltage amplification. Contains a volume control which attenuates the signal. Also sometimes contains an RIAA equalisation circuit for vinyl playback. Designed to drive high impedance loads (10k - 100k).</p><p></p><p>Power Amp: Part of the amplifier (sometimes separate unit) that does some more voltage amplification and also current amplification. Designed to drive low impedance loads (1 to 32 Ohms).</p><p></p><p>Ampdog and GECO and others can give you much more detailed explanation of the above. I am but a simpleton in these matters.</p></blockquote><p></p>
[QUOTE="Henry, post: 431084, member: 14394"] Lots and lots of amplifier PCBs, or complete kits available on eBay from various Chinese sellers. Op Amp: Integrated circuit containing a operation amplifier. Does small signal voltage amplification and buffering(?). Mostly used in pre-amp circuits. Replaces a lot of small signal transistors in a small package. Pre-Amp: Part of the amplifier (sometimes in separate case) that does input switching and sometimes voltage amplification. Contains a volume control which attenuates the signal. Also sometimes contains an RIAA equalisation circuit for vinyl playback. Designed to drive high impedance loads (10k - 100k). Power Amp: Part of the amplifier (sometimes separate unit) that does some more voltage amplification and also current amplification. Designed to drive low impedance loads (1 to 32 Ohms). Ampdog and GECO and others can give you much more detailed explanation of the above. I am but a simpleton in these matters. [/QUOTE]
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DIY For Audio
Small amplifier circuit board help
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