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Finished Refer to the Swiss FM300A circuit mono 100W HIFI DIY amplifier board

Name: Finished Refer to the Swiss FM300A circuit mono 100W HIFI DIY amplifier board
Brand: BRZ-hifi-audio
SKU: FM300A
Price: 54.28 USD
Availability: InStock

Limited Offer!

5.0 (1 Reviews)

5 Sold

~~$59.00~~ $54.28

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17/05/2026/00:00:00 - 31/05/2026/00:00:00

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Description

Features:

Referring to the well-known FM300A circuit design, after multiple adjustments and upgrades, there has been a significant improvement in performance and sound quality.

● Using metal encapsulated transistor as input and voltage stage, the voltage stage operates in pure Class A state.
● The final stage uses transistors of the same level for output sound, which is full of charm.
● Single channel design ensures that the left and right channels do not interfere with each other.
● The board is equipped with rectification, filtering, protection, and amplification components, with a compact and reasonable layout
● ELNA AUDIO 63v10000uF Audio Electrolytic Capacitor
● ON 15032、 15033 is used to drive transistors.
● Voltage isolated power supply.
● Output power transistor selection ON MJL4281.

Parameters:

● Output power: 100W
● AC voltage: AC30-35 * 2, it is recommended to reserve at least 150W for each channel transformer.
● Static current: 200mA, each channel requires at least 1kG of heat sink
● Signal to noise ratio: 120dB, only 0.3mV
● Full load distortion: 0.003%
● Input sensitivity: 750mV
● Magnification factor: 31.3 times
● Size: 198 * 81mm
● Input impedance: 18k
● Supporting radiator size: L253 * H85 * W50mm（The radiator needs to be purchased separately）

List:

1 x FM300A circuit amplifier board

CUSTOMER REVIEWS

5.0 1 Reviews

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