Category: 202505
Realize the AV realm of two speakers-virtual surround sound technology QS7779
[Photo] The actual production of 6N11 and 6AS7 dual tube amp
[Photo] Homemade small power amplifier and speaker (TDA1521)
[Photo] Pure DC field effect tube power amplifier circuit-matching
[Photo] Desheng R9700 high sensitivity radio circuit diagram