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Class aDo you mean pure Class A or Class A/B amplifiers?
Yes.. I would like to go pre assembled way.. But any idea where I can get pre-assembled class a kitsIf you are new don't go for a DIY way assembling all the components on PCB by yourself, changes of wrong placement and dry solder are higher. Get yourself a pre assembled kit. Secondly I will not recommend Class A Amp for a beginner. I will recommend you to go for a low power class AB or Chip based amp first.
Have no idea how to do it.
True. The challenge with class A is not the soldering. It is the chassis and wiring, and to some extent the biasing process if one isn't familiar with it.Class A is very challenging from mechanical point of view. Large heat sink for dissipating the heat automatically makes the cabinet large, huge capacitor bank raises cost of parts substantially, etc..
I have some PCB's to spare of stereo Class AB amplifier. power output is 70+70 W into 8 ohms and 120 + 120W into 4 ohms, SNR > 109dB, THD < 0.01% at rated power. it has power supply and protection circuit inbuilt. no wiring hassles so, would be easy for you to have a working amp as you would need only power transformer, enclosure and in out connectors in addition.