DIY Custom Built-In Speakers In Computer Case (TDA7492 Digital Amp) скачать в хорошем качестве

DIY Custom Built-In Speakers In Computer Case (TDA7492 Digital Amp)

Computer for a family member....decided to try something I have been thinking about for a while. Case is Antec Three Hundred Two. Enclosed the harddrive cage with aluminum sheet metal. Used a non-ferrous blade to cut the metal. The Antec Three Hundred Two is well suited for this. Has large volume for getting speaker response. Has nice flat surfaces to put sheet metal on. Internal volume was 0.179 Cubic Feet. Speakers are Tang Band W3-881SJ 3" Full Range Neodymium Driver. Amplifier is from Parts Express "TDA7492 Digital Audio Amplifier Board 2x50W" Part # 320-606. The voltage booster is Yuan-Jing Adjustable Boost Converter Board. Part # 320-6546. Initially the voltage level of the headphone was too high for the amplifier input and so I had to turn the volume way down. I used a voltage divider for a 4:1 (10.5K to 2.5K) ratio and it did have just about exactly a 4x volume decrease in Windows Volume slider. I would probably go with a 5 or 6:1 ratio if doing it again. Had horrible ground loop noise when the headphone plug was plugged into the back of the motherboard. Was a little skeptical, but a $8 ground loop isolator (3.5mm to 3.5mm) fixed it perfectly.