FV-2024 utilizes the SANYO thick-film packaged STK3048 as the pre-amplifier, featuring a dual operational amplifier structure internally. With a maximum voltage capability of ±50V, it significantly enhances the dynamic range of music and minimizes harmonic distortion. In practical tests, compared to ordinary operational amplifiers, the treble sounds clearer and more delicate, while the bass becomes more elastic and pleasant to listen to. This effect is unmatched by ordinary operational amplifier circuits.
STK3048 is a dual-channel, single-in-line thick-film package with two stages inside. The input stage features a differential amplifier with protection, and its collector's resistive-capacitive series phase compensation network prevents transient distortion caused by sudden signals in the input stage. A set of mirror current sources is connected between the two collectors. The main voltage amplification stage is a common-base common-emitter circuit, where the upper transistor performs broadband amplification of the signal and provides impedance matching for direct coupling between the input and output stages; the lower transistor linearly outputs the amplified current of the upper transistor to reduce the open-loop distortion of this stage and provide greater excitation power to the subsequent stage. Both stages of amplification tubes are supplemented with constant current sources as loads, providing strong suppression of power supply ripple.
Model:FV-2024
Frequency response range:10Hz~100KHz
Signal to Noise Ratio:95dB@1KHZ
Input impedance:100K
Output impedance:100Ω
Distortion degree:≤0.003%1KHZ
SoundAdjustment:±12dB
Power supply voltage:AC220V ± 10% (customizable 110V version)
Dimensions:330x210x60MM
Weight:3KG
