Singxer
Singxer SA-1 V2 Fully Balanced Class A Headphone Amplifier
Singxer SA-1 V2 Fully Balanced Class A Headphone Amplifier
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SINGXER SA-1 V2 Balanced Headphone Amplifier Class A
Description
The Singxer SA-1 V2 is a high-performance headphone amplifier and preamplifier based on a Class A architecture with fully balanced discrete circuits. This updated version features an optimized circuit design for lower output impedance and increased thrust, providing an exceptional audio experience for audiophiles.
Features
- Full Analog Amplifier: The SA-1 V2 is completely analog, avoiding EMI interference caused by digital control, ensuring pure audio signal transmission.
- ROHM Input Transistors: Ensures very low noise and excellent performance, with an output stage utilizing multi-stage current amplification similar to high-power amplifiers.
- High-Power Output: Each channel incorporates 2 pairs of ON Semiconductor 4A transistors for low internal resistance and high output power, with comprehensive protection against overcurrent, overload, short-circuit, and more.
- Versatile Connectivity: The SA-1 V2 offers various inputs and outputs, including balanced XLR and unbalanced RCA inputs, as well as balanced 4.4mm jack, 4-pole XLR, and unbalanced 6.35mm jack headphone outputs. Additionally, it features unbalanced RCA and balanced XLR preamplifier outputs.
- Impedance Selection: The front panel includes switches for selecting input source (RCA or XLR) and impedance mode (LOW-Z or HI-Z) to accommodate high-sensitivity or high-impedance headphones.
- Optimized Circuit Design: The V2 version features an optimized PCB routing and DC bias design, enhancing DC performance and output capacity.
Technical Specifications
- Product Type: Headphone amplifier, Preamplifier
- Amplification Type: Class A
- Inputs: 1x Balanced XLR, 1x Unbalanced RCA
- Outputs:
- 1x Balanced XLR (Preamplifier)
- 1x Unbalanced RCA (Preamplifier)
- 1x Balanced 4.4mm jack (Headphone)
- 1x Balanced XLR 4-pole (Headphone)
- 1x Unbalanced 6.35mm jack (Headphone)
- THD+N:
- -120dB @ 1kHz, A-Weighting, 20Hz – 22kHz
- -96dB @ low gain, 1kHz, A-Weighting, 20Hz-22kHz
- Noise Level:
- 0.66µV @ Max Output, SNR/DNR 147dB
- 300nV RMS @ Low Gain, A-Weighting, 20Hz-22kHz
- SNR: 147dB
- Headphone Output Power:
- Balanced output: 10000mW @ 16Ω
- Balanced output: 5500mW @ 32Ω
- Balanced output: 3100mW @ 68Ω
- Balanced output: 2000mW @ 120Ω
- Balanced output: 380mW @ 600Ω
- Unbalanced output: 500mW @ 16Ω
- Unbalanced output: 1375mW @ 32Ω
- Unbalanced output: 775mW @ 68Ω
- Unbalanced output: 500mW @ 120Ω
- Unbalanced output: 95mW @ 600Ω
- Gain Levels:
- Unbalanced input, unbalanced output: low gain 0db, high gain 11db
- Unbalanced input, balanced output: low gain 6 dB, high gain 17 dB
- Balanced input, unbalanced output: low gain -6db, high gain 5db
- Balanced input, balanced output: low gain 0db, high gain 11db
- Output Impedance Levels:
- Low-impedance output: 1.4 ohms (balanced) and 0.7 ohms (unbalanced)
- High-impedance output: 11.4 ohms (balanced) and 10.7 ohms (unbalanced)
- Power Supply: 100-240V AC, 50/60Hz
- Dimensions: 234 x 170 x 46mm
- Chassis Material: Aluminum
- Color: Black
- Weight: 1.8kg
- Package Contents:
- 1x Singxer SA-1 V2
- 1x Power cable
Ultra-low distortion, the following figure shows the performance of APX555 test prototype:
