The Singxer SA-1 V2 is a complete, high-performance headphone amplifier and preamplifier based on Class A architecture and fully balanced discrete circuits. Version 2 of the Singxer SA-1 features an optimized circuit design for lower output impedance and greater thrust.
Full analog headphone amplifier
Completely analog, no EMI interference caused by digital control disturbs the audio signal. ROHM input transistors ensure very low noise and excellent performance. The output stage uses multi-stage current amplification, similar to that found in a high-power amplifier. Each channel incorporates 2 pairs of ON Semiconductor 4A transistors to ensure sufficiently low internal resistance and high output power. These circuits also incorporate comprehensive protection against overcurrent, overload and short-circuit, as well as thermal protection, DC protection and turn-on time delay.
Verious inputs and outputs
The SA-1 V2 also features a full range of connectors. Inputs include unbalanced RCA and balanced XLR. For headphone outputs, the amplifier offers balanced 4.4mm jack and 4-pole XLR, and unbalanced 6.35mm jack. On the preamplifier output side, the SA-1V2 offers an unbalanced RCA output and a balanced XLR output.
Special Features
To adapt to all types of headphones, whether high-sensitivity or high-impedance models, the SA-1 V2 offers impedance selection (low or high) via a bipolar switch on the front panel. A second switch selects the source (RCA or XLR). A third switch selects the impedance resistance mode for headphone outputs: LOW-Z is low resistance mode, HI-Z is high resistance mode. On the preamplifier outputs, the unbalanced output impedance is 22.5 ohms and the balanced output impedance is 45 ohms.
| SPECIFICATIONS | |
|---|---|
| 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 4.4mm jack headphone output 1x Balanced XLR 4-pole headphone output 1x Unbalanced 6.35mm jack headphone output |
| THD+N | -120dB @ 1kHz, A-Weighting, 20Hz – 22kHz -96dB @ low gain, 1kHz, A-Weighting, 20Hz-22kHz |
| Noise level | 0.66µV @ Niveau de sortie max, SNR / DNR 147dB 300nV RMS @ Gain faible, 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 @ 600ΩUnbalanced 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 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) |
| GENERAL | |
|---|---|
| Power supply | 100-240V AC, 50/60Hz |
| Dimensions | 234 x 170 x 46mm |
| Chassis material | Aluminum |
| Color | Black |
| Weight | 1.8kg |
| Conditionnement | 1x Singxer SA-1 V2 1x Power cable |
David (verified owner) –
This little box is a great surprise!
The sound quality is very good and sounds great with my hi-fiman Edition X. Very good, the Arya also sounds very good on it.
It is very well built and convenient in daily use.
Only the settings that you don’t use much are at the bottom, which might have been better.
Otherwise a top amplifier!
Rene –
What a nice amplifier, very quiet, black background. Lots of details, very nice placement of instruments and artists. Super tight bass reproduction. Play with Meze 109 pro headphones. Previously I had a Creek OBG21 headphone amplifier, but this is such a big leap forward that I never dared to dream of it. Questions were answered quickly, seriously and honestly. In short, very satisfied.
Massimo –
This is a good amp for the price. Can easily compete with amps up to at least 1000 euros. Sound is more engaging and enjoyable than the good, but more sterile Topping family competitors. Thing I noticed is that the front switch doesn’t really turn it off (it still keeps drawing about 3 watts), with the back switch it turns really off. Also this on/pre/pha switch can cause serious DC offset peaks, at least on the XLR-outs, which can be a serious issue with certain power amps driving speakers (Singxer needs to be turned on first and turned off last to prevent issues). Not sure if this is only my unit (btw I didn’t put jumpers on the power supply protection circuit).