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A3S HiFi Preamp Tone Control Board 5 Knobs Top Version OPA2107 + 2107 Patch For DIY Applications
Features:
- A3S five knobs with balance adjustment version
- Class A power supply HiFi preamp tone control board
- OPA2107 Op Amp: Sound is warm and charming, pure and sweet, and the resolution is super high
- Class A parallel HiFi tube preamp
- Potentiometer center spacing: 24-24-24-35MM. Board size: 145 x 66MM (LxW)
Package Included:
- 1 x Set of Tone Control Board
FAQ:
1. Regarding Heat Generation: Due to Class A parallel circuits, Class A obtains sound quality by high heating and low efficiency. The internal resistance of Class A parallel regulator is very small, which improves the sound quality significantly, the sound density is high, the charm is sufficient, the high frequency sound is delicate and silky, the middle frequency sound is true and natural and full, the vocal emotion is strong. The sound reproduction effect of speaker stereo is very good, the low-frequency dynamic is beautiful, and the rebound is strong. Normal work is about 55℃. Generating much heat is normal for Class A. During development, each of the voltages supported by the board has a long-term aging test to ensure the reliability of the product. It can be used with confidence at this temperature.
2. It is recommended to install it with a metal case. The potentiometer is installed on the aluminum panel of metal case. The metal case has a shielding effect and there will be no induction sound. If it is installed without a shell or with a wooden box, it is recommended to wrap the potentiometer handle with a wire, clamp it with a nut, and then ground it. In this way, when you touch the potentiometer, there will be no humming inductive interference.
3. About Sound Quality: Talking about audio electronics is a subjective thing. Everyone has different understanding of sound and the matching of rear board and speakers; the effect will be different.
