Denon produces a range of audio products, including amplifiers, receivers, CD players, digital audio players, headphones, and speakers. They also produce professional audio equipment such as DJ mixers, turntables, and digital audio workstations. Denon is known for producing high-quality audio equipment with innovative features such as wireless connectivity and advanced audio processing. They are often considered a premium brand in the audio industry and their products are used by professionals and enthusiasts around the world.