Preamplifier Board, DROK HIFI Audio Pre-amplifier Module AC 15V-18V Preamp Circuit Board Adjustable Volume Regulation Controller Knob with OPAMP Socket & Transparent Acrylic Shell

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About Preamplifier Board, DROK HIFI Audio Pre-amplifier

Features: The Preamplifier Board specially implanted electronic filter circuit, equivalent to installed hundreds of thousands of micro-method of filter capacitance, the current sound is not audible. With acrylic shell, has elegant appearance. It includes the functions preamp, treble, alto, bass, volume control, Pitch pass-through, and so on. The preamp with the magnification switch switches, you can switch between 5 times and 9 times. Board with the OPAMP socket, you can freely replace and upgrade it according to their own hobbies, flexible and convenient to use, to meet the different sense of listening. We have optimized the old version, modified the electronic filter circuit parameters, the heat sink using oxidation blackening, make its effect better. Audio input and output block gold plating treatment, contact better, can lossless transmission signal. Signal access to the resistance of military 718 factory gold film, the resistance after 5 cycles of aging, high precision, small temperature drift, stable performance sound more natural permeability. WIMA Red Elixir to add to the sense of a mellow, grinding its ling, but without losing details, positioning feel better. Parameters: Supply voltage: AC 15-18V (cannot use DC) PCB size: 145*70*1.6mm Package includes: 1* Preamplifier Board with NE5532 OPAMP 1* Acrylic Shell DIY Kit