The GG version, fully known as Gaincard, is an excellent LM1875 circuit that has undergone repeated comparison, verification, and optimization abroad. It boasts a wide frequency bandwidth, exquisite sound quality, pleasant listening experience, and remarkable stability at the midpoint. If you haven't tried the LM1875, 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 and do not change with the input signal. The input voltage of the transistor (field-effect transistor) at the amplifier input terminal remains constant, and the bias state always maintains a suitable operating point.
Generally, the LM8175 has a single output of 4A current, according to official specifications. With low drive sensitivity, its driving force may fall short of expectations. By using parallel output, the drive current can be doubled to 8A. This results in a better soundstage, fuller mid- and low-frequency response, and increased power.
Product highlights:
►Adopting the CG circuit architecture from Haosheng, the sound is very delicate and pleasant to listen to, with a stable midpoint.
►Adopting double-sided gold-plated military-grade PCB, it boasts excellent conductivity and is resistant to oxidation.
► Outputting with the addition of red penta-oxygen copper inductance to eliminate interference clutter, resulting in purer and more natural sound quality.
►With the Omron protection circuit from Japan, you can use it with greater peace of mind.
►Fully high-end component configuration (due to the non-standard nature of DALE resistors, they are defaulted to the renowned Beijing Military Industry 718 copper-pin resistors).
Power range: AC12-AC22X2
Output power: 35W-8 ohms, 65W 4 ohms
Impedance range: 2-8 ohms
Frequency response: 10HZ-40KHZ
PCB size: 124X76 mm
Weight: approximately 166g
