Electrical characteristics:
●Working status: Class AB (can be adjusted to Class A as needed)
● Output power: 300W*(8Ω)<* V=±55v>
● Working voltage: recommended voltage drive stage ± 55V; current output stage ± 50V,
● Power mode: Dual voltage, voltage drive and current power output stage are separately powered, and can also be combined.
●PCB size: 215 x 93.5 mm, PCB thickness 2mm, PCB copper foil thickness 2OZ
●Product net weight: 300g
● Power amplifier board design features:
● 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 three pairs of Toshiba 2SA1943/2SC5200 power tubes, which have low output impedance and large power margin.
● Power tube pairing error is within 2%.
● There is a perfect midpoint voltage protection circuit, speaker delay protection circuit, and the main chip adopts UPC1237, which is stable and reliable.
● The voltage level/current stage power supply is designed separately to avoid the influence of the fluctuation of the power supply on the front stage when the current level is large and dynamic, so as to minimize the sound and dye.
Introduction to LME49810:
● LME49810 with 300W mono power amplifier board NS's latest LME49810 driver IC is the core, can be used with a variety of output-level power tubes, LME49810 chip is a high-origin mono audio power amplifier driver, most suitable for Audiophile and professional audio system. The unique feature of the LME49810 chip is the built-in Baker clamp circuit, which ensures that the amplifier output will not saturate in the event of overdrive, because the high-level audio signal passes through "soft clipping" after any undesired audio. False signals are suppressed. The "soft clipping" feature is very useful because the old solid-state amplifiers are especially prone to audio artifacts due to strong clipping.
● LME49810 power amplifier board is mono design. Two power amplifier boards are required to form two channels. Each channel adopts one LME49810+ three pairs of power tubes (bipolar transistor and MOSFET pin compatible) design, left and right channel PCB symmetry structure. The PCB is made of 2mm thick quality sheet.
The main parameters of LME49810 chip:
● Conversion rate 50V/μs
● Drive current 60mA (typ)
● Power supply ripple rejection ratio (f = DC) 110dB
● Total harmonic distortion + noise (f = 1kHz) 0.007
   
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