The signpost of amplifier constructions
The audiophile world is divided into two almost irreconcilable camps according to the type of amplifier. Some overcome minimal distortion and precision, others prefer sound liking, want to listen to the kind of sound they like, and some distortion does not work.
Tube amplifiers
Tube amplifiers have orderly greater harmonic distortion than transistors. But their sound is very popular in the audio world. They have less power, less amplification than transistors. The perfect combination of the tube amplifier is then with highly sensitive speakers.
Transistor amplifiers
They are very precise, constructions are mostly made for maximum harmonic distortion suppression. Transistors have greater gain than tubes, but they also have their disadvantages.
Nelson Pass A-class amplifiers.pdf
Hybrid amplifiers
They combine the harmonic distortion of the tube as a preamplifier and the constant, robust power of the transistor in the power section.
A Single-Ended Class-A Hybrid Amp Part 1.pdf
A Single-Ended Class-A Hybrid Amp Part 2.pdf
http://audio-diy.rdacoustic.cz/wp-content/uploads/Hybrid-Zen-amplifier.gif
Sources
A high-quality source part is an integral part of each amplifier
Power Filtering, Shielding
Do not allow network and electromagnetic interference to penetrate sensitive parts of your structures.
EMC – Electro- Magnetic Compatibility
Způsoby omezování rušení – odrušovací prostředky a elektromagnetické stínění.pdf