Description
xThe basic evaluation method of true and false LM1875:
The real LM1875 can be put on AC22VX2, and the counterfeit will fry if it exceeds 18VX2. The real output is protected, and the output short circuit will not burn, and the counterfeit output short circuit will blow up. If it is TDA2030A, it will blow up if it exceeds 16V.
GG version is the full name.Gaincard is a very sound LM1875 circuit that has been repeatedly compared and optimized abroad. It has frequency bandwidth, fineness, hearing resistance, midpoint and stability. If you have not played LM1875, it is recommended to buy it and try it. If you have bought LM1875, users can buy it as an upgrade.
The principle is that the voltage of the two input terminals of the inverting amplifier circuit is always 0, which does not change with the input signal. The input voltage of the transistor (field effect transistor) at the input terminal of the amplifier is constant, and the bias state is always maintained at the appropriate operating point.
Generally, the output of a single LM8175 is 4A current, the official indicator, the driving sensitivity is low, and the large amount of speakers is useless with BTL, and the driving force will be overwhelmed. With parallel output, the driving current can be doubled to 8A current., so that the sound field is better, the medium and low frequencies are fuller, and the power is also improved
PCB size: 124X76 mm
Weight: about 166g
The default main capacitor of the kit is the original UK NOVER 10000UF 35V, which is more durable than Nippon Chemical and Nikon. You need to weld the kit yourself, or you can choose the finished plate.
Product Highlights:
*Adopting a good-sounding CG circuit architecture, the sound is very delicate and durable, and the midpoint is stable
*Double-sided gold-plated military PCB is used, with good electrical conductivity and not easy to oxidize
*The output adds red copper pentoxide inductance to eliminate interference and clutter, and the sound quality is purer and more natural
*Japanese Omron protection circuit, more secure to use
*Full advanced component configuration (because there are many non-standard DALE resistors, the default is changed to the famous Beijing Military 718 copper pin resistor).
PCB size "123MMX75MM board is a double-layer immersion gold PCB.
After decades of classics, why are we still playing with the LM1875 power amplifier circuit?
Power range: AC12-AC22X2
Output power: 35W-8 ohms 65W 4 ohms
Impedance range: 2-8 ohms
Frequency response: 10HZ-40KHZ
Because the price is low, the circuit is classic, and the sound is durable. Although the price is not high, the sound has courage and endless aftertaste!
Recommended transformer
https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1582430503.15.UmBemY&id=7314354497
Recommended radiator
https://item.taobao.com/item.htm?spm=a1z10.3-c.w4002-1582430503.23.nGEIH2&id=524757565205
Refer to the wiring diagram, it is the same as the wiring of a single GC1875.
Additional Information
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Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
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