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Audionote M7 circuit HIFI DIY stereo 5687 tube preamplifier 274B electron tube rectification

Name: Audionote M7 circuit HIFI DIY stereo 5687 tube preamplifier 274B electron tube rectification
Brand: BRZ-hifi-audio
SKU: M7
Price: 225.4 USD
Availability: InStock

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5.0 (1 Reviews)

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Description

Product Details:

This preamp adopts a 5687 single electron tube common cathode amplification+voltage parallel negative feedback architecture, pursuing a warm and delicate listening experience while balancing distortion control and appropriate voltage gain.

● Refer to AN M7 circuit design.
● 70W pure copper wire wound power transformer, shell shielded treatment, small magnetic leakage.
● Dual 220V 80MA high voltage power supply, 5687 3.15V-0-3.15V 1A AC power supply, midpoint grounded, effectively reducing noise. The use of this filament connection for power supply not only retains the musical charm of the AC filament, but also has no current sound, and the sound quality is lively and dynamic..
● No input coupling capacitor, output coupling adopts Japanese Tokyo Electronics TE 0.22UF MKP thin film capacitor in parallel with American SPRAGUE capacitor of 0.1UF, with excellent high and low frequency performance.
● CLRC filtering circuit, with small ripple and quiet background. The rectification effect of electronic tubes is more delicate than that of transistors at high frequencies, and the sound is rounded.
● Key parts adopt well-known brand copper foot carbon film precision resistors.
● Japanese ALPS 16 potentiometer.
● Copper foot gold-plated ceramic electronic tube socket.
● Pure copper gold-plated RCA, sturdy and durable.

Parameters:

● Technical Parameters:
● Input sensitivity: 220mv
● Voltage gain: 4.7 times.
● Signal to Noise Ratio (S/N Ratio): 86DB
● Frequency Response: 20Hz-38KHz (-3DB)
● Input Impedance: 100Kohm
● Output Impedance: 1.3Kohm
● Channel isolation: 68DB
● Weight: 3.5KG
● Size: D 220MM (including knob RCA） H 180mm (including chassis legs to the top of 5Z4P electronic tube) W 160mm

List:

1 x Audionote M7 circuit tube preamplifier（To ensure transportation safety, the power input line is not included by default)

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5.0 1 Reviews

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Audionote M7 circuit HIFI DIY stereo 5687 tube preamplifier 274B electron tube rectification

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Audionote M7 circuit HIFI DIY stereo 5687 tube preamplifier 274B electron tube rectification

Quantity:

CUSTOMER REVIEWS

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