The reason why Letu is well-known to HiFi consumers is inseparable from the voice recorder NAGRA SD (commonly known as Pumpkin SD) that it made for the Swiss brand in the early years. This product was supposed to play a big role in the recording market, but it happened to become a cross-border artifact in portable HiFi devices in the early years because of its natural and moist vocal texture and excellent playback quality. In fact, Letu has long been well-known in the radio and television system, and its affiliated Yingfu Meidi Group is the largest radio station automation broadcast supplier in China and even in Asia, and its audio equipment developed by it has been widely used by CCTV and many overseas national TV stations.
 
PAW GOLD is Leto's flagship HiFi music player, and in Japan's VGP 2016 recommended list of portable players above 150,000 yen (about 9,000 yuan), PAW GOLD is the only single product other than the Avery and AK series. In terms of sound quality alone, PAW GOLD is the top of the line among portable HiFi players. When paired with DSD, the superior resolution can bring excellent detail reproduction, and it will not be overstimulated even after listening to it for a long time. When it comes to instrumentation and ensemble, PAW GOLD not only has a wide soundstage and accurate positioning, but also a rich amount of information that is not chaotic and orderly. Its performance in low frequencies is also outstanding, not only deep diving, amazing penetration, but also quite shocking dynamic explosiveness. The powerful direct push ability can not only eat all kinds of earbuds on the market, but also can often surprise when driving large earphones with high impedance. The style of the PAW GOLD system is the only controversy at the moment, with traditional consumers falling in love with the parameter-listed level gauges, while younger gamers who are accustomed to smart systems often find it too cumbersome and intimate. Although the price of 12,000 yuan is expensive, deep HiFi users who are picky about the sound quality will feel that it is worth the money. In addition, the PAW 5000 is also equipped with Bluetooth function, and as the silver winner of the 2015 Japan Spring Headphone Festival, the price of less than 2,000 yuan is also a good entry-level choice.