The GC version, fully known as Gaincard, is a highly optimized LM1875 circuit that has undergone repeated comparisons and verifications abroad. It boasts a wide frequency bandwidth, exquisite sound quality, pleasant listening experience, and excellent midpoint stability. If you haven't tried the LM1875 before, I recommend giving it a try. For users who have already purchased the LM1875, it can serve as an upgrade.
The principle is that the voltages at the two input terminals of the inverting amplifier circuit are always 0, which does not change with the input signal. The input voltage of the transistor (field-effect transistor) at the amplifier's input terminal remains constant, and the bias state always maintains a good operating point.
Why do we still play with the LM1875 amplifier circuit, a classic for decades?
Due to its low price, classic circuit design, pleasant sound quality, and bold yet memorable sound, it leaves an endless aftertaste despite its affordable price!
*Adopting the high-quality GC circuit architecture, the sound is very delicate and pleasant to listen to, with extremely stable mid-range
* Double-sided gold-plated military-grade PCB is used, with good conductivity and resistance to oxidation.
* Output is enhanced with red pentoxy copper inductance to eliminate interference and clutter, resulting in purer and more natural sound quality.
* Japanese Omron protection circuit, ensuring greater peace of mind.
* Full high-grade component configuration, including Beijing military-grade 718 copper-pin resistors.
Operating Voltage: AC12V x 2 to AC22V x 2
PCB Size: 99 x 63mm Maximum Height: 45mm (including soldering legs)
Output Power: 35W - 4 ohms, 25W - 8 ohms
Signal-to-Noise Ratio: 116dB
Weight: 249g
