Parameter:
Mode: Mono
Working status: Class A and B (can be adjusted to Class A according to need)
Output power: 400W*(8Ω)<* V=±65v>
Working voltage: recommended voltage drive level ±60V; current output level ±55V, current output level voltage is always lower than voltage drive level voltage by about 5V, speaker protection: AC 20-24V
Power supply mode: dual power supply working mode, voltage drive and current power output stage are powered separately, or combined power supply.
PCB size: 298.5 x 93.5 mm, PCB thickness 2mm, PCB copper foil thickness 2OZ
Net weight: 400g
Power amplifier board design features:
The DC servo design is adopted so that the midpoint output of the power amplifier board is less than 5MV.
The drive adopts Toshiba original 2SA1930/2SC5171.
The current output stage uses 5 pairs of Toshiba 2SA1943/2SC5200 power tubes, with low output impedance and large power margin.
Power tube pairing error is within 2%.
There is a perfect midpoint voltage protection circuit, a horn delay protection circuit, and the main chip uses UPC1237, which is stable and reliable.
The voltage/current level power supply is designed separately to avoid the influence of power supply fluctuations on the front stage when the current level is highly dynamic, and to minimize the sound pollution.
Introduction to LME49810:
LME49810 is equipped with 300W mono power amplifier board NS. The latest LME49810 driver IC is the core and can be used with a variety of output stage power tubes. The LME49810 chip is a highly original mono audio power amplifier driver for audiophiles And professional audio system. The unique feature of the LME49810 chip is the built-in Baker clamping circuit, which can ensure that the amplifier output will not saturate under overdriving conditions, because after the high-level audio signal undergoes "soft clipping", any undesirable audio All false signals will be suppressed. The "soft clipping" function is very useful, because the use of older solid-state amplifiers is particularly prone to audio glitches due to strong clipping.
The LME49810 power amplifier board is a mono design. Two power amplifier boards are required to form a dual channel. Each channel uses a LME49810+5 pair of power tubes (bipolar transistors are compatible with MOSFET pins). The left and right channels are symmetrical. structure. PCB uses 2mm thick high-quality plate.
Main parameters of LME49810 chip:
Wide voltage range: ±20V to ±100V
Conversion rate: 50V/μs
Drive current: 60mA (typ)
Power supply ripple rejection ratio: (f = DC) 110dB
Total harmonic distortion + noise: (f = 1kHz) 0.007
Package: 1pcs LME49810 400W 8Ω Mono DC Servo Class A and Class B Amplifier Board
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accept returns and replacements within 30 days from the day the cutomer
receive the products.Please make first contact within 30 days from
receiving the order.Products should be returned in original condition.
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