Singxer SA-1 V2
Singxer SA-1 V2
Singxer SA-1 V2

Singxer SA-1 V2: Class A headphone pre/amplifier

Avatar photoMarcus Carlsen·
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Singxer SA-1 V2 is a complete high-performance headphone amplifier and preamplifier based on Class A architecture and fully balanced discrete circuits. The second version of Singxer SA-1 has optimized circuitry for lower output impedance and more power.

Singxer SA-1 V2

Fully analog, no electromagnetic interference caused by digital control will disturb the audio signal. ROHM input transistors provide very low noise and excellent performance. The output stage uses multi-stage current amplification, similar to that used in high-power amplifiers. Each channel uses 2 pairs of ON Semiconductor 4A transistors, which ensures fairly low internal resistance and high output power. These circuits also provide comprehensive overcurrent, overload and short circuit protection, as well as thermal, DC and turn-on delay protection.

Singxer SA-1 V2

The SA-1 V2 also features a full range of connectors. Inputs include unbalanced RCA and balanced XLR. For headphone output, the amplifier offers a balanced 4.4 mm jack and 4-pole XLR, as well as an unbalanced 6.35 mm jack. At the preamplifier output, the SA-1V2 has unbalanced RCA and balanced XLR outputs.

Singxer SA-1 V2

To adapt to all types of headphones, whether high sensitivity or high impedance models, the SA-1 V2 offers gain selection (low or high) via a bipolar switch on the front panel. The second switch selects the signal source (RCA or XLR). The third switch selects the impedance mode for the headphone outputs: LOW-Z is low impedance mode, HI-Z is high impedance mode. The preamp outputs have an unbalanced output impedance of 22.5 ohms and a balanced output impedance of 45 ohms.

Singxer SA-1 V2

Specifications of Singxer SA-1 V2:

  • Product Type: Headphone Amplifier/Preamplifier
  • Amplification Type: Class A
  • Inputs: 1x balanced XLR/1x unbalanced RCA
  • Outputs: 1x balanced XLR/1x unbalanced RCA/1x balanced headphone output 4.4 mm jack/1x balanced XLR 4-pole headphone output/1x unbalanced headphone output 6.35 mm jack
  • THD+N: -120 dB @ 1 kHz, A-Weighting, 20 Hz – 22 kHz/-96 dB @ Low Gain, 1 kHz, A-Weighting, 20 Hz – 22 kHz
  • Noise level: 0.66 µV @ Niveau de sortie max, SNR / DNR 147dB/300nV RMS @ Gain faible, A-Weighting, 20Hz-22kHz
  • SNR: 147 dB
  • 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 6dB, High Gain 17dB/Balanced Input, Unbalanced Output: Low Gain -6dB, High Gain 5 dB/Balanced Input, Balanced Output: Low Gain 0dB, High Gain 11dB
  • Output Impedance Levels: Low impedance output impedance is 1.4 ohms (balanced) and 0.7 ohms (unbalanced)./High impedance output impedance is 11.4 ohms (balanced) and 10.7 ohms (unbalanced)
  • Power: 100-240 VAC, 50/60 Hz
  • Dimensions: 234 x 170 x 46 mm
  • Housing material: Aluminum
  • Black color
  • Weight: 1.8 kg