Product Details

• The valve amplifier has its own "valve taste", with warm and classical sound, good sense of music, good atmosphere, its significant advantage is the sweet and soft sound, natural concern, particularly its size of great dynamic range and good linearity can be easily replaced by other devices.
• A wide range of combinations and strong applicability: it can be combined with all audio signals available in the market: power amplifier and active speaker with analog and digital signal, etc.
• Classic valve 6J1 design: It adopts the classic valve 6J1 design, optimized circuit, the valve design is interchangeable, which produces soft, sweet and soft sound.
• Power conversion module: The product adopts AC-DC power design, DC12V power source, available for universal application.
• Prominent finish, highlight personal style: The product adopts the all-aluminum shell through CNC technology.
• Use boost mode, high voltage power supply: Better than common power supply mode, AC100V-240V
• Soft tone, mellow vocal base, sweet and warm, transparent and classic.
• A937 is a high performance portable mini-sized valve signal preamp, sound quality processor, built-in high performance boost processor and signal amplifier, with respect to circuit design, the assignee I / O signal processing and amplification function to the most classic valve 6J1. This valve is specially used for high performance audio system design, with ultra-low harmonic distortion, low noise, high gain bandwidth and other characteristics. Dual FET input offers a wider dynamic range, as well as audio signal amplification and bipolar circuit for the valve. The valve sound enhancement processing technology can correct and restore signal loss and phase deviation caused by the audio signal system for various reasons, so faithfully reproduce sound, make listener feel enriched bass and treble, the sense of positioning, clarity and brightness are close to the ideal scene effect, the addition of audio signal enhancement circuit to acoustic system will make the sound more beautiful, bring about the enhanced sense of depth, fineness and clarity, fine treble, transparent and mellow tenor, natural and soft bass, as if listener is placed on the scene . Valve signal preamplifier is mainly used for signal input, eg: computer, cellphone, tablet, game console, TV set, TV box, MP3, signal source output device and other signal input, product I / O uses the universal RCA interface, audio signal amplification switch. The product has a wide application range, covering any kind of signal input device, or alternatively used as a signal preamplifier, the power supply and signal uses the boosted module for implementing voltage isolation technology, and applies high-precision Taiwan-made potentiometer for balancing and calibration, with extreme high degree of positive / negative voltage balance. In addition, it has high capacity professional filter capacitor for filtering, and the power supply is considerably clean. signal amplification is cleaner.

Specification

• filament voltage: 6.3 V, current: 0.17A
• plate voltage: 120 V, current: 7.35mA
• second-grid voltage: 120 V, current: 3.2 mA
• transconductance amplifier: 5.2 mA / V
• cathode resistance: 200Ω
• input impedance:> 12 k
• SNR> 100dB
• THD + N: 0.0003%
• Audio I / O: RCA stereo jack
• power supply: DC12V
• net weight: 286g
• Product with package weight: 447g
• dimensions: 99.1mm (L) X 95.1mm (W) X 30mm (H)
• Package size: 20 cm (L) X 18 cm (W) X 5.5 cm (H)

Packing list

• 1 X A937 Valve Amplifier
• 1 X 100-240V AC adapter (DC12V)