Original sentence: A Loudness switch – de rigueur in that era – boosts upper and lower frequencies; a "mute" switch reduces volume by 20 dB for low-level listening.NAD eschewed the laboratory test equipment thinking prevalent at the time, and instead aimed to make their amplifiers capable of properly driving "real loudspeakers" under realistic conditions.Signature innovations incorporated into the design, and models following it, include "soft-clipping circuit" that protects against overdriven signals, connections that allow splitting of the power amplifier section from the preamplifier, a button to bypass tone controls, and Full Disclosure Power ratings measuring output power under demanding real-world loads.The  has four inputs that can be switched from the front panel – Aux, Tuner, Phono, Tape.The company designed the product in Europe and delocalised production to factories in Taiwan – one of the first manufacturers to do so.The manufacturer claims the phono input, that can also be used with high-output moving coil cartridges, contains a 6-transistor circuit "engineered for extremely low noise and nearly distortion-free performance"
Edited sentence: A Loudness switch – de rigueur in that era – boosts upper and lower frequencies; a "mute" switch reduces volume by 20 dB for low-level listening.NAD eschewed the diktat of laboratory test equipment thinking prevalent at the time, and instead aimed to make their amplifiers capable of properly driving "real loudspeakers" under realistic conditions.Signature innovations incorporated into the design, and models following it, include "soft-clipping circuit" that protects against overdriven signals, connections that allow splitting of the power amplifier section from the pre-amplifier, a button to bypass tone controls, and Full Disclosure Power ratings measuring output power under demanding real-world loads.The  has four inputs that can be switched from the front panel – Aux, Tuner, Phono, Tape.The company designed the product in Europe and delocalised production to factories in Taiwan – one of the first manufacturers to do so.The manufacturer claims the phono input, that can also be used with high-output moving coil cartridges, contains a sophisticated 6-transistor circuit "engineered for extremely low noise and nearly distortion-free performance"