Sound quality design based on the latest acoustic engineering and psychological research results. Using the usual method of sound creation whereby certain high frequencies are emphasized, you're given to feel vivid sound when you first listen, but because of this, other ranges become clouded and hard to hear. With E3000, not creating a range that is emphasized makes for high definition and a vast sound stage. With well-balanced sound reproduction from low through to high frequencies, you can experience the same kind of sound spread you would if you listened to music in a concert hall. With high definition and flat, natural sound quality, this product could be considered a "standard".