Features:
*Standard version (Beijing Green Cube Transformer)
*Upgraded version (Imported Talema transformer)
*The circuit is referenced from the Accuphase 3850 preamplifier. The circuit is a preamplifier worth making and admiring. It is more delicate than the general preamplifier, and the sound can be compared with the tone of a beautiful electronic tube. The circuit architecture uses the op amp as the basic amplifier. Discrete parts are added to increase the open loop gain. The voltage and current double feedback circuit is used to reduce distortion. The output tube uses the British original famous tube ZTX450 ZTX550, which is a Class A state output, which is very close to a tube amplifier.
*Pure HIFI (high fidelity) front-end machine 2.0 stereo, the measured sound quality is clean and transparent.
*The low frequency is mellow and powerful, the middle frequency is thick and full, and the high frequency is clear and delicate.
*The product has:
① Balanced input-balanced output, balanced input-single-ended output, single-ended input-balanced output.
②Two-way RCA input selection (true balanced amplifier circuit, power supply for left and right channels is completely independent, and the degree of separation is very good.
*The op amp is equipped with NE5534 op amp by default, and customers can upgrade by themselves. The board does not need to be debugged, just install and weld correctly.
*The capacitor adopts the British NOVER main filter ELNA Switzerland, RIFA decoupling, Philips military resistance, double-sided military PCB and so on.
*Talema square sealing ring cattle: 15VA, double 18V toroidal transformer.
*LME49710NA has a low distortion rate (it is the world's audio dedicated audiophile op amp that can achieve total harmonic distortion and noise indicators below 0.00003%. It is admired by many audio enthusiasts all over the world. One of the best op amps on fever).
*The advantages of low noise, high conversion rate, wide operating voltage range and large output current, high comprehensive performance, can easily meet the needs of demanding audio applications, suitable for professional and high-end audio systems, and can be widely used for high fidelity Buffer amplifier, high-fidelity active filter, high-fidelity headphone amplifier, high-fidelity phono equalization amplifier, high-quality audio amplifier, high-fidelity preamplifier, high-fidelity multimedia, high-performance professional audio, high-fidelity equalization and analysis Frequency network, high-performance line driver, high-performance line receiver, mixer, etc.
*The sound is balanced and clean, natural and durable, high analytical power, dynamic, deep low frequency, full mid-frequency, sweet and moisturized voice, transparent high frequency, delicate and smooth, and full of appeal.
Product parameter:
*Signal to noise ratio: 116Db@1Khz
*Model: C3850 fully balanced preamplifier
*Distortion: 0.003%@1Khz
*Frequency response range: 20Hz~50KHz
*Op Amp: LME49710NA*4
*Output impedance: 600Ω
*Impedance: 50K
*Power supply voltage: AC220V/110V
*Size: 372*241*52mm
*Net weight: 3.04KG
Packing list :
Preamplifier*1